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1.
Drug Res (Stuttg) ; 66(3): 126-9, 2016 Mar.
Article in English | MEDLINE | ID: mdl-26479129

ABSTRACT

BACKGROUND: Besides its antiarrhythmic action, carvedilol has an activity to suppress cardiac tissue damage. However, it is unknown whether it has any effect on cellular apoptosis and ion channel remodelling. PURPOSE: To know whether carvedilol has any effect on apoptosis and ion channel remodeling of HL-1 cells expressing E334K MyBPC, and comparing it with bisoprolol. METHOD: We examined effects of carvedilol and bisoprolol on the levels of pro- and anti-apoptotic proteins and ion channels as well as apoptosis of HL-1 cells transfected with E334K MyBPC using Western blot and flow cytometry. RESULTS: Carvedilol decreased the protein levels of p53, Bax and cytochrome c and increased that of Bcl-2 in HL-1 cells expressing E334K MyBPC. Bisoprolol failed to affect the protein levels. Both carvedilol and bisoprolol increased the protein levels of Cav1.2 but not that of Nav1.5. Carvedilol was stronger than bisoprolol at decreasing the number of annexin-V positive cells in HL-1 cells expressing E334K MyBPC. CONCLUSION: Carvedilol suppressed apoptosis of HL-1 cells expressing E334K MyBPC through modification of pro- and anti-apoptotic proteins, whose was associated with an increase of Cav 1.2 protein expression.


Subject(s)
Apoptosis/drug effects , Carbazoles/pharmacology , Carrier Proteins/metabolism , Ion Channels/metabolism , Myocytes, Cardiac/drug effects , Propanolamines/pharmacology , Bisoprolol/pharmacology , Carvedilol , Cell Line , Humans , Myocytes, Cardiac/metabolism , Proto-Oncogene Proteins c-bcl-2/metabolism , Tumor Suppressor Protein p53/metabolism , bcl-2-Associated X Protein/metabolism
2.
Drug Res (Stuttg) ; 66(5): 270-4, 2016 May.
Article in English | MEDLINE | ID: mdl-26909689

ABSTRACT

BACKGROUND: Although urate impaired the endothelial function, its underlying mechanism remains unknown. We hypothesized that urate impaired nitric oxide (NO) production in human umbilical vein endothelial cells (HUVECs) via activation of uric acid transporters (UATs). PURPOSE AND METHOD: In the present study, we studied effects of urate on NO production and eNOS protein expression in HUVEC cells in the presence and absence of urate lowering agents using molecular biological and biochemical assays. RESULTS: HUVECs expressed the 4 kinds of UATs, URATv1, ABCG2, MRP4 and MCT9. Exposure to urate at 7 mg/dl for 24 h significantly reduced production of NO. Pretreatment with benzbromarone, losartan or irbesartan normalized NO production. The same exposure resulted in dephosphorylation of endothelial NO synthase (eNOS) in HUVECs. Again pretreatment with benzbromarone, losartan or irbesartan abolished this effect. CONCLUSION: Urate reduced NO production by impaired phosphorylation of eNOS in HUVEC via activation of UATs, which could be normalized by urate lowering agents.


Subject(s)
Human Umbilical Vein Endothelial Cells/drug effects , Nitric Oxide Synthase Type III/metabolism , Nitric Oxide/metabolism , Uric Acid/pharmacology , Uricosuric Agents/pharmacology , ATP Binding Cassette Transporter, Subfamily G, Member 2/antagonists & inhibitors , ATP Binding Cassette Transporter, Subfamily G, Member 2/metabolism , Benzbromarone/pharmacology , Biphenyl Compounds/pharmacology , Cells, Cultured , Glucose Transport Proteins, Facilitative/antagonists & inhibitors , Glucose Transport Proteins, Facilitative/metabolism , Human Umbilical Vein Endothelial Cells/metabolism , Humans , Irbesartan , Losartan/pharmacology , Monocarboxylic Acid Transporters/antagonists & inhibitors , Monocarboxylic Acid Transporters/metabolism , Multidrug Resistance-Associated Proteins/antagonists & inhibitors , Multidrug Resistance-Associated Proteins/metabolism , Neoplasm Proteins/antagonists & inhibitors , Neoplasm Proteins/metabolism , Phosphorylation , Tetrazoles/pharmacology
3.
Atherosclerosis ; 154(2): 345-54, 2001 Feb 01.
Article in English | MEDLINE | ID: mdl-11166767

ABSTRACT

Although intimal hyperplasia is a major cause limiting the long-term patency of the vein grafts, its precise mechanisms, including the effect of poor runoff, has not yet been well characterized. We thus designed the present study to try to determine the effect of poor runoff arterial flow to the phenotypic alterations of the graft wall by immnohistochemistry using anti-intermediate filaments (alpha-SM actin, desmin, and vimentin) and anti-myosin heavy chain (SM1, SM2, and SMemb) specific antibodies. Vein grafts implanted under the poor runoff hind limb of rabbits showed enhanced intimal hyperplasia, however, no apparent difference in the cytoskeleton expression, including intermediate filaments and MHC, between two groups until 4 weeks. Interestingly, six of eight vein grafts at 2 weeks after implantation in both groups showed the accumulations of perivascular fibroblast-like phenotype (negative for SM1, alpha-SM actin, and desmin) in some parts of the outer neointima, whereas the inner neointima at 2 weeks and the whole neointima at 4 weeks were mainly occupied by a smooth muscle phenotype (positive for these three). Although the cellular origin of these cells is still unknown, these results suggest that the migration of non-muscle mesenchymal cells is involved in the neointima and thus may provide a clue for better understanding vein graft remodeling.


Subject(s)
Femoral Artery/surgery , Femoral Vein/immunology , Femoral Vein/transplantation , Intermediate Filament Proteins/immunology , Myosin Heavy Chains/immunology , Anastomosis, Surgical , Animals , Arterial Occlusive Diseases/metabolism , Arterial Occlusive Diseases/physiopathology , Arterial Occlusive Diseases/surgery , Blood Flow Velocity , Blood Vessel Prosthesis , Femoral Vein/metabolism , Femoral Vein/pathology , Fibroblasts/pathology , Hindlimb/blood supply , Intermediate Filament Proteins/metabolism , Male , Muscle, Smooth, Vascular/metabolism , Muscle, Smooth, Vascular/pathology , Myosin Heavy Chains/metabolism , Phenotype , Rabbits , Transplantation, Autologous/immunology , Transplantation, Autologous/pathology , Tunica Intima/metabolism , Tunica Intima/pathology
4.
Surgery ; 127(1): 87-91, 2000 Jan.
Article in English | MEDLINE | ID: mdl-10660763

ABSTRACT

BACKGROUND: Platelet aggregation is modulated by blood flow. We investigated whether platelet function is altered during percutaneous transluminal balloon angioplasty in patients with atherosclerosis obliterans. METHODS: Blood samples were obtained from the iliac artery in 9 lower limbs of 7 patients undergoing percutaneous balloon angioplasty of the iliac artery. An agonists-induced platelet aggregation test was performed with an aggregometer. Femoral blood flow was measured with a Doppler velocimeter before and after the procedure. RESULTS: Before dilatation, the maximum platelet aggregation rates (+/- SEM) induced by adenosine phosphate, epinephrine, and arachidonic acid were 54.7% +/- 5.8%, 64.8% +/- 4.3%, and 60.5% +/- 6.1%, respectively. After angioplasty, these values reduced to 36.7% +/- 4.1%, 36.1% +/- 8.6%, and 40.1% +/- 5.0%, respectively (P < .05). The pre-procedural ankle-brachial pressure index, mean flow rate, mean velocity, and shear stress variation were 0.63 +/- 0.1, 218.1 +/- 32.1 mL/min, 9.4 +/- 1.1 cm/sec, and 60.6 +/- 17.7 dyne/cm2, respectively. The mean velocity at the stenotic lesion was 215.1 +/- 83.9 cm/sec, which was significantly greater than those of the distal artery or after angioplasty (P < .01). Both ankle-brachial pressure index and shear stress variation increased after angioplasty to 0.99 +/- 0.07 (P < .05) and 139.8 +/- 17.0 (P < .05) dyne/cm2, but the mean flow rate and the mean velocity (198.3 +/- 24.5 mL/min and 8.8 +/- 1.2 cm/sec after angioplasty) did not change significantly. CONCLUSIONS: These results indicate that activated platelet function at a stenosed artery was decreased after angioplasty, possibly because of normalized blood flow with reduction of stenotic lesion.


Subject(s)
Angioplasty, Balloon , Arteriosclerosis/blood , Arteriosclerosis/therapy , Iliac Artery , Platelet Aggregation , Aged , Aged, 80 and over , Arteriosclerosis/physiopathology , Hemodynamics , Humans , Male , Middle Aged
5.
Surgery ; 108(1): 81-9, 1990 Jul.
Article in English | MEDLINE | ID: mdl-2360192

ABSTRACT

The relationship between development of intimal thickening and permeability of an arterial autogenous vein grafts in dogs' limbs was examined with horseradish peroxidase used as a tracer. The transendothelial transports increased under conditions of abnormal blood flow, compared with findings with a normal blood flow, and a large amount of horseradish peroxidase infiltrated the subendothelial spaces for 4 weeks after implantation, a time when intimal thickening progressed rapidly. It would thus appear that, under conditions of abnormal blood flow, intimal hyperpermeation would be a contributing factor to the intimal thickening of an autogenous vein graft before an autovein graft had completely adapted to the new environment.


Subject(s)
Endothelium, Vascular/ultrastructure , Veins/transplantation , Animals , Blood Flow Velocity , Cell Membrane Permeability , Dogs , Endothelium, Vascular/pathology , Female , Femoral Vein/transplantation , Femoral Vein/ultrastructure , Horseradish Peroxidase , Hyperplasia , Male , Microscopy, Electron , Transplantation, Autologous , Veins/pathology , Veins/ultrastructure
6.
Surgery ; 113(6): 700-8, 1993 Jun.
Article in English | MEDLINE | ID: mdl-8506529

ABSTRACT

BACKGROUND: Because blood flow modulates endothelial prostacyclin production, the extent of this production in autologous vein grafts implanted in poor distal runoff limbs needed to be examined. METHODS: Endothelial prostacyclin production in canine autologous vein grafts was measured in poor distal runoff limbs (poor runoff group) and compared with findings in normal runoff limbs (control group). Vein grafts were perfused in a closed circuit at 3 days and 1, 2, 3, and 4 weeks after implantation; after perfusion for the first 30 minutes in a steady flow (basal prostacyclin production), the grafts were exposed to arachidonic acid (stimulated prostacyclin production) for the following 30 minutes. Prostacyclin, as the metabolite 6-keto-PGF1 alpha, was radioimmunoassayed. RESULTS: Basal and stimulated prostacyclin production increased in both groups during a period of time after implantation. At 2 weeks when endothelialization was complete, prostacyclin production in the poor runoff group was impaired, compared with the findings in the control group, and this difference increased with time. At 4 weeks the stimulated prostacyclin production was 18.91 +/- 4.03 ng/cm2 in the control group and 11.60 +/- 1.67 ng/cm2 in the poor runoff group (p < 0.05). CONCLUSIONS: We propose that the impaired capacity of the vein graft to produce prostacyclin in a poor distal runoff may lead to loss of graft patency in reconstructed arteries.


Subject(s)
Endothelium, Vascular/metabolism , Epoprostenol/biosynthesis , Veins/transplantation , Animals , Dogs , Extremities/blood supply , Female , Hyperplasia , Male , Veins/pathology , Veins/ultrastructure
7.
Surgery ; 125(5): 545-52, 1999 May.
Article in English | MEDLINE | ID: mdl-10330944

ABSTRACT

BACKGROUND: To determine the factors influencing the prognosis of patients with abdominal aortic aneurysms (AAA), the clinical characteristics and long-term survival of 366 consecutive patients were examined and compared with those in previous Western studies. METHODS: During the period from January 1979 to December 1995, 376 patients with AAA were admitted to our hospital. Among these, 332 consecutive patients underwent elective reconstruction of infrarenal AAAs. The remaining 44 patients were not surgically treated. With use of the data from the patients who underwent AAA resection, the relationship of various risk factors, such as cardiac dysfunction, hypertension, renal dysfunction, pulmonary dysfunction, and age, to survival rate was investigated by univariate and multivariate analysis. RESULTS: The operative mortality rate was 0.6%. The survival of the patients who underwent the operation at 5 years was 71.0% and at 10 years 51.8%. The survival rate of the patients who were not surgically treated at 5 years was 26.0% and at 10 years 14.9%. There was a significant difference between the 2 groups. A univariate analysis was performed on each possible risk factor affecting survival rates. In relation to the survival rate of 5 and 10 years, there was no statistical significant difference between patients with or without heart disease or hypertension. By contrast, factors influencing long-term survival were associated with renal dysfunction, pulmonary dysfunction, and age at time of surgery. Multivariate analysis of risk factors affecting survival rates demonstrated that renal dysfunction, pulmonary dysfunction, and age at the time of operation were found to be significant, respectively. The main cause of the death for the long-term survival patients with AAA repair was malignancy, whereas that in the patients without repair was rupture. CONCLUSIONS: Risk factors influencing survival after AAA repair were renal dysfunction, pulmonary dysfunction, and advanced age in Japanese patients. In addition, the main cause of death after aneurysmal resection was malignancy. These results were different from outcomes in Western patients. We need to carefully watch out for malignancy during the follow-up period after AAA resection.


Subject(s)
Aortic Aneurysm, Abdominal/mortality , Aortic Aneurysm, Abdominal/surgery , Aged , Female , Humans , Male , Middle Aged , Postoperative Complications , Risk Factors , Survival Rate
8.
J Am Coll Surg ; 191(6): 619-25, 2000 Dec.
Article in English | MEDLINE | ID: mdl-11129810

ABSTRACT

BACKGROUND: Cardiovascular disease such as coronary artery disease is a major cause of late death after repair of abdominal aortic aneurysm (AAA). But risk factors are not well known. So, we investigated the incidence of cardiovascular events after surgery and examined the prognostic factors. STUDY DESIGN: We retrospectively reviewed 270 patients who underwent elective surgery for AAA from 1985 to 1995. Kaplan-Meier survival analysis was used to estimate survival rates and the probability of coronary, cerebrovascular, and cardiovascular events. The risk factors for each endpoint were investigated using multivariate analysis. RESULTS: The overall survival rate was 87.3% at 3 years, 76.4% at 5 years, and 52.3% at 10 years. Current cigarette use, renal insufficiency, advanced age (> or = 70 years old), and higher plasma fibrinogen level (> or = 300 mg/dL) were significant factors influencing survival. The probability of a coronary event was 4.9% at 3 years, 7.1% at 5 years, and 20.7% at 10 years. Plasma fibrinogen level and cerebrovascular disease were significant prognostic factors for coronary events. The probability of a cerebrovascular event was 5.3% at 3 years, 7.6% at 5 years, and 18.0% at 10 years. No significant prognostic factors for cerebrovascular events existed. The probability of a cardiovascular event was 10.3% at 3 years, 14.9% at 5 years, and 33.6% at 10 years. Plasma fibrinogen level was a significant risk factor for cardiovascular events. But the presence of coronary artery disease did not affect survival or the incidence of coronary, cerebrovascular, or cardiovascular events. CONCLUSIONS: Plasma fibrinogen level is an independent risk factor of future coronary events after surgery for AAA, and the increased risk of coronary artery events contributes to the impaired survival. Patients with higher plasma fibrinogen level need careful surveillance for cardiovascular disease after surgery.


Subject(s)
Aortic Aneurysm, Abdominal/complications , Aortic Aneurysm, Abdominal/surgery , Cardiovascular Diseases/etiology , Cardiovascular Diseases/mortality , Cerebrovascular Disorders/etiology , Cerebrovascular Disorders/mortality , Coronary Disease/etiology , Coronary Disease/mortality , Fibrinogen/metabolism , Postoperative Complications/etiology , Postoperative Complications/mortality , Adult , Age Distribution , Aged , Aged, 80 and over , Analysis of Variance , Aortic Aneurysm, Abdominal/blood , Cause of Death , Female , Humans , Incidence , Male , Middle Aged , Prognosis , Proportional Hazards Models , Renal Insufficiency/complications , Retrospective Studies , Risk Factors , Smoking/adverse effects , Survival Analysis
9.
Am J Surg ; 164(3): 241-7, 1992 Sep.
Article in English | MEDLINE | ID: mdl-1415923

ABSTRACT

The objective of this study was to evaluate the impact of thrombolysis of synthetic grafts before urgent vascular reconstruction. In 29 patients, 41 thrombosed synthetic grafts that underwent intraarterial thrombolysis were studied. The cases were divided into three groups: group I--complete thrombolysis followed by reconstruction; group II--complete thrombolysis alone; and group III--incomplete lysis requiring reconstruction or sympathectomy. Follow-up ranged from 1 to 556 days (mean: 149 days). Kaplan-Meier analysis was used to determine patency and limb salvage rates. One-year patency and limb salvage rates were 53% and 95%, 34% and 67%, and 38% and 48%, respectively, for groups I, II, and III. Eighteen complications occurred in 16 of the 41 (39%) episodes. One patient died of intracranial hemorrhage. The best results were achieved when complete lysis was followed by appropriate reconstruction. Patency was equally poor in complete thrombolysis alone and reconstructions required by incomplete thrombolysis. Limb salvage was better after complete thrombolysis, regardless of the appropriate reconstruction.


Subject(s)
Graft Occlusion, Vascular/drug therapy , Leg/blood supply , Thrombolytic Therapy , Urokinase-Type Plasminogen Activator/therapeutic use , Aged , Combined Modality Therapy , Female , Follow-Up Studies , Graft Occlusion, Vascular/physiopathology , Graft Occlusion, Vascular/surgery , Humans , Male , Middle Aged , Treatment Outcome , Vascular Patency
10.
Panminerva Med ; 41(1): 1-4, 1999 Mar.
Article in English | MEDLINE | ID: mdl-10230247

ABSTRACT

BACKGROUND: Endothelial prostacyclin production is modulated by blood flow (wall shear stress). Local plasma prostacyclin concentrations and hemodynamic parameters have therefore been investigated in patients with atherosclerosis obliterans before and after angioplasty. METHODS. DESIGN: Prospective study. SETTING: Department of Surgery, Matsuyama Red Cross Hospital, Matsuyama, Japan. PATIENTS: Nine lower limbs in eight patients with significant stenoses of the iliac artery were studied. INTERVENTIONS: blood samples were obtained from the femoral artery and femoral vein of nine lower limbs undergoing percutaneous balloon angioplasty of the iliac artery. MEASURES: Prostacyclin concentrations, radioimmunoassayed as 6-keto-prostaglandin F1 alpha, were measured before and after balloon dilatation. Femoral blood flow and the ankle-brachial pressure index (ABI) were measured using a Doppler velocimeter before and after the procedure. The femoral blood flow waveform was used to calculate the mean blood flow and shear stress variation. RESULTS: Before angioplasty, the mean (+/- SEM) plasma prostacyclin concentration was 21.6 +/- 1.5 pg/ml in the femoral artery and 25.4 +/- 1.1 pg/ml in the femoral vein. After angioplasty, these values increased to 25.6 +/- 2.2 pg/ml (p < 0.05) and 32.8 +/- 1.8 pg/ml (p < 0.01), respectively. The pre-procedural ABI, mean flow rate, and shear stress variation were 0.596 +/- 0.071, 354.1 +/- 63.3 ml/min, and 69.1 +/- 9.9 dyne/cm2, respectively. Both ABI and shear stress variation increased after angioplasty to 0.738 +/- 0.076 (p < 0.05) and 111.1 +/- 24.2 (p = 0.0775) dyne/cm2, but the mean flow rate (287.1 +/- 61.1 ml/min after angioplasty) did not increase (p = 0.2002). CONCLUSIONS: These results suggest that prostacyclin production increases after angioplasty, possibly due to increases in the intraluminal pressure and shear stress variation. This enhanced prostacyclin production may help to maintain arterial or bypass graft patency.


Subject(s)
Angioplasty, Balloon, Coronary , Arteriosclerosis Obliterans/therapy , Epoprostenol/biosynthesis , Iliac Artery , Aged , Arteriosclerosis Obliterans/metabolism , Female , Humans , Male , Middle Aged , Prospective Studies
11.
Am Surg ; 67(10): 935-8, 2001 Oct.
Article in English | MEDLINE | ID: mdl-11603548

ABSTRACT

The goal of this study was to assess the management of failed or failing infrainguinal bypasses with distal correctable lesions. A retrospective analysis of 94 procedures was performed for 72 (77%) failed and 22 (23%) failing infrainguinal bypasses with distal correctable lesions in 94 patients. The 94 procedures included 50 (53%) balloon angioplasties and 44 (47%) distal vein graft extensions from the previous graft to the distal artery. Preprocedural thrombolytic therapy was performed in 62 of 94 limbs with a failed graft, and complete thrombolysis was achieved in 30 of 94. The results of thrombolytic therapy (complete or incomplete thrombolysis) or the means of revision procedure (balloon angioplasty or distal vein graft extension) did not affect the patency. Lower patency was observed for women, patients with a secondary bypass, and grafts with multiple episodes of revision. We conclude that the patency of failing infrainguinal bypasses after revision of distal lesions was affected not by means of therapy but by previous vascular procedures, the usual risk factors, and female gender.


Subject(s)
Arterial Occlusive Diseases/surgery , Leg/blood supply , Leg/surgery , Adult , Aged , Anastomosis, Surgical , Female , Graft Occlusion, Vascular , Humans , Male , Middle Aged , Reoperation , Retrospective Studies , Treatment Failure , Vascular Patency , Vascular Surgical Procedures
12.
Am Surg ; 58(8): 506-8, 1992 Aug.
Article in English | MEDLINE | ID: mdl-1642391

ABSTRACT

Between 1981 and 1990, 18 patients (mean age 66.0 years) had aortobifemoral bypass with polytetrafluoroethylene (PTFE) bifurcated grafts. Twelve patients (66.7%) were treated for aortoiliac occlusive disease, 5 patients (27.8%) for abdominal aortic aneurysms and one patient (5.6%) had surgery for hypoplastic aortic syndrome. The authors' overall complication rate was 16.7 per cent and included formation of an anastomotic pseudoaneurysm (1/18, 5.6%), graft infection (1/18, 5.6%), and graft thrombosis (1/18, 5.6%). Sixteen patients were followed for a mean period of 41.4 months. In this subgroup of patients the patency rate was 93.8 per cent. The authors conclude that the PTFE bifurcated graft is a suitable conduit for use in aortobifemoral bypass surgery.


Subject(s)
Aorta, Abdominal/surgery , Blood Vessel Prosthesis , Femoral Artery/surgery , Polytetrafluoroethylene , Aged , Anastomosis, Surgical , Aortic Aneurysm/epidemiology , Aortic Aneurysm/surgery , Arterial Occlusive Diseases/epidemiology , Arterial Occlusive Diseases/surgery , Blood Vessel Prosthesis/statistics & numerical data , Evaluation Studies as Topic , Female , Follow-Up Studies , Humans , Male , Middle Aged
13.
J Cardiovasc Surg (Torino) ; 32(3): 353-9, 1991.
Article in English | MEDLINE | ID: mdl-2055935

ABSTRACT

The Ad Hoc Committee on Reporting Standards of the Society for Vascular Surgery and the International Society for Cardiovascular Surgery (SVS/ISCVS) proposed a new angiographic scoring system that grades the quality of vessels distal to the expected bypass site and calculates an overall runoff score. To assess the predictability of the bypass grafts by this runoff scoring system, we compared this runoff score with postoperative increase in the ankle/brachial index (delta ABI) and intraoperatively measured flow waveform patterns in 60 patients undergoing femoropopliteal bypass grafts. No correlation was found between delta ABI and the runoff score. Graft-patent survival time correlated with the runoff score (r = 0.44, p = 0.02). Grafts with type 0 or I flow waveform pattern with a satisfactory long-term patency had a significantly lower runoff score than grafts with type II, III or IV flow waveform pattern (p less than 0.05). When all the grafts were arbitrarily divided into two groups (grafts with a runoff score over 4.5 and those with a score of less than 4.0), a superior long-term patency was obtained in the low runoff score group with polytetrafluoroethylene (p less than 0.01) and saphenous vein grafts (p = 0.04), but not in the group with composite grafts (p = 0.25). Thus, the SVS/ISCVS runoff scoring system can be used to predict the fate of bypass grafts in femoropopliteal arterial reconstructions.


Subject(s)
Femoral Artery/physiopathology , Leg/blood supply , Popliteal Artery/physiopathology , Adult , Aged , Aged, 80 and over , Blood Vessel Prosthesis , Female , Femoral Artery/diagnostic imaging , Femoral Artery/surgery , Follow-Up Studies , Graft Survival , Humans , Male , Middle Aged , Popliteal Artery/diagnostic imaging , Popliteal Artery/surgery , Radiography , Reference Values , Regional Blood Flow , Saphenous Vein/transplantation
14.
J Cardiovasc Surg (Torino) ; 41(2): 307-9, 2000 Apr.
Article in English | MEDLINE | ID: mdl-10901542

ABSTRACT

Inflammation or infection is one of the major causes of superior mesenteric vein thrombosis. A case of secondary superior mesenteric vein thrombosis is presented, which was identified with enhanced CT. The mesenteric venous thrombosis was due to diverticulitis of the ileum, and ilio-cecal resection was performed. Because no findings of intestinal ischemia were present, thrombectomy was not attempted. After surgery, the patient was followed up by repeated CT scan, and spontaneous thrombolysis without thrombectomy or thrombolytic therapy was exhibited. The present case indicated abdominal inflammation or infection strongly related to the development and regression of mesenteric venous thrombosis.


Subject(s)
Digestive System Surgical Procedures , Diverticulitis/complications , Ileal Diseases/complications , Ileocecal Valve/surgery , Mesenteric Vascular Occlusion/etiology , Thrombosis/etiology , Diverticulitis/surgery , Humans , Ileal Diseases/surgery , Laparotomy , Male , Mesenteric Vascular Occlusion/diagnostic imaging , Mesenteric Veins , Middle Aged , Remission, Spontaneous , Thrombosis/diagnostic imaging , Tomography, X-Ray Computed
15.
J Cardiovasc Surg (Torino) ; 41(6): 905-10, 2000 Dec.
Article in English | MEDLINE | ID: mdl-11232974

ABSTRACT

BACKGROUND: Controversy still remains regarding the long-term results and indications for axillofemoral bypass (AxFB). A comparison of axillobifemoral bypass (AxBFB) and aortobifemoral bypass (ABFB) was thus conducted to determine whether AxFB is an acceptable alternative vascular procedure to anatomic bypass for high-risk patients. METHODS: Sixty-three patients who underwent a total of 25 AxBFBs and 38 ABFBs for aortoiliac occlusive disease were reviewed retrospectively, and both univariate and multivarate analyses were perfomed. RESULTS: The overall survival was 82.8% at five years. A univariate analysis revealed significantly lower survival rates for patients with limb-threatening ischemia, coronary disease, and cerebrovascular disease. A multivariate analysis disclosed no significant factors influencing survival rates. The overall primary patency was 79.8% at five years. The primary patency rates for AxBFB (67.7% at five years) were significantly lower than for ABFB (88.5% at five years) based on a univariate analysis (p=0.0045). In addition, the secondary patency rates for AxBFB (80.3% at five years) were significantly lower than for ABFB (96.5% at five years, p=0.0025). A multivariate analysis disclosed significantly lower primary patency rates for grafts with a higher angiographic outflow score and simultaneous infrainguinal reconstructive procedures, but the differences between AxBFB and ABFB were not significant. CONCLUSIONS: The survival and primary patency for the AxBFB group were both inferior to the ABFB group, however a multivarate analysis disclosed no significant differences between the two groups. Poor femoral run-off and the presence of synchronous infrainguinal reconstructive procedures significantly affected graft patency, and these factors modulated the patency of AxBFB. AxFB for aortoiliac occlusive disease is therefore considered to be an acceptable procedure in appropriately selected patients.


Subject(s)
Aorta, Abdominal , Arterial Occlusive Diseases/surgery , Axillary Artery/surgery , Blood Vessel Prosthesis Implantation/methods , Femoral Artery/surgery , Iliac Artery , Adult , Aged , Aged, 80 and over , Anastomosis, Surgical/instrumentation , Anastomosis, Surgical/mortality , Angiography , Aorta, Abdominal/diagnostic imaging , Aorta, Abdominal/surgery , Arterial Occlusive Diseases/diagnosis , Arterial Occlusive Diseases/mortality , Arterial Occlusive Diseases/physiopathology , Axillary Artery/diagnostic imaging , Biocompatible Materials , Blood Flow Velocity , Blood Vessel Prosthesis , Blood Vessel Prosthesis Implantation/instrumentation , Blood Vessel Prosthesis Implantation/mortality , Female , Femoral Artery/diagnostic imaging , Follow-Up Studies , Graft Survival , Humans , Iliac Artery/diagnostic imaging , Iliac Artery/surgery , Male , Middle Aged , Polyethylene Terephthalates , Polytetrafluoroethylene , Retrospective Studies , Survival Rate , Ultrasonography, Doppler
16.
J Cardiovasc Surg (Torino) ; 37(1): 1-6, 1996 Feb.
Article in English | MEDLINE | ID: mdl-8606200

ABSTRACT

OBJECTIVE: Long-term results after repair of abdominal aortic aneurysm (AAA) with concomitant malignancy were reviewed, and factors which may affect survival were analyzed. DESIGN: Retrospective series with follow-up of three to 125 months. Setting. Department of Surgery, Matsuyama Red Cross Hospital, Matsuyama, Japan. PATIENTS: Among 112 consecutive repairs of AAA, 16 cases had concomitant malignancy. The malignant lesions included eight gastric cancers and eight other malignant tumours. The malignancies were divided using TNM Classification into an early stage (stage O or I) group (n=9) and an advanced stage (stage II, III, or IV) group (n=7). INTERVENTIONS: All aneurysms were successfully repaired, and simultaneous resection of the concomitant malignancy was performed in five cases. While 13 malignant lesions were resected completely, three could not be resected completely, but were treated by other surgical procedures. MEASURES: Survival rates were predicated using the Kaplan-Meier method. The log-rank test was used to compare survival rates. RESULTS: The one-, two-, and five-year survival rates after repair of AAA were 80%, 72% and 63%, respectively. The survival rates for the early stage group were significantly higher than those for the advanced stage group (p<0.05). Patients with concomitant gastric cancer or who underwent complete resection of the malignant lesion survived longer. CONCLUSION: In patients with concomitant AAA and malignancy, factors influencing survival for those with malignant lesions also affected survival after aneurysmectomy. Detection of early-stage concomitant malignancy and more aggressive treatment for the malignancy may improve the outcome.


Subject(s)
Aortic Aneurysm, Abdominal/surgery , Neoplasms/complications , Age Factors , Aged , Aged, 80 and over , Aortic Aneurysm, Abdominal/complications , Aortic Aneurysm, Abdominal/mortality , Blood Vessel Prosthesis , Female , Follow-Up Studies , Humans , Linear Models , Male , Middle Aged , Neoplasms/mortality , Neoplasms/surgery , Prognosis , Retrospective Studies , Stomach Neoplasms/complications , Stomach Neoplasms/mortality , Stomach Neoplasms/surgery , Survival Rate , Time Factors
17.
J Cardiovasc Surg (Torino) ; 38(4): 359-65, 1997 Aug.
Article in English | MEDLINE | ID: mdl-9267344

ABSTRACT

OBJECTIVE: The purpose of this study was to evaluate the efficacy of a newly developed antiplatelet agent, 4-cyano-5, 5-bis[methoxyphenyl]-4-pentenoic acid (E5510) on intimal hyperplasia of experimental autologous vein grafts in a distal poor runoff canine model. METHOD: The femoral vein was implanted into the femoral artery preparing a distal poor runoff model. These animals were divided into three groups consisting of the E5510 group, the Aspirin group, and the Control group. The vein grafts were harvested at either 1 or 4 weeks after implantation. RESULTS: At 4 weeks, the degree of intimal hyperplasia of the graft of E5510 group was significantly less than that of the Aspirin group and the Control group (p < 0.05). No significant difference was observed between the Aspirin group and the Control group. At 1 week, the degree of intimal cell proliferation was determined by bromodeoxyuridine (BrdU) incorporation and was expressed as the BrdU labeling index. The BrdU labeling index of the E5510 group was also significantly lower than that of the Control group (p < 0.05). CONCLUSIONS: These data demonstrate the efficacy of E5510 in reducing intimal hyperplasia of vein grafts under distal poor runoff conditions by reducing the degree of smooth muscle cell proliferation.


Subject(s)
Fatty Acids, Monounsaturated/pharmacology , Femoral Vein/transplantation , Platelet Aggregation Inhibitors/pharmacology , Tunica Intima/pathology , Animals , Aspirin/pharmacology , Blood Flow Velocity , Bromodeoxyuridine/pharmacology , Cell Division/drug effects , Dogs , Femoral Artery/surgery , Femoral Vein/pathology , Hyperplasia , Male , Platelet Aggregation/drug effects , Tunica Intima/drug effects
18.
Hepatogastroenterology ; 46(28): 2212-5, 1999.
Article in English | MEDLINE | ID: mdl-10521970

ABSTRACT

Torsion of the gallbladder is a rare disease and pre-operative diagnosis of the disease is uncommon. About 400 cases have been reported, but only 4 were diagnosed by pre-operative imaging. We report on a case of gallbladder volvulus diagnosed pre-operatively using pre-operative imaging with ultrasound and computed tomography.


Subject(s)
Gallbladder Diseases/diagnosis , Aged , Female , Gallbladder Diseases/diagnostic imaging , Gallbladder Diseases/surgery , Humans , Tomography, X-Ray Computed , Torsion Abnormality/diagnosis , Torsion Abnormality/surgery , Ultrasonography
19.
Hepatogastroenterology ; 48(41): 1513-6, 2001.
Article in English | MEDLINE | ID: mdl-11677998

ABSTRACT

BACKGROUND/AIMS: Total gastrectomy has generally been performed for the treatment of early gastric cancers involving the upper third of the stomach. However, proximal gastrectomy has also been used for the treatment of cardial early gastric cancer. METHODOLOGY: To compare the nutritional parameters after proximal gastrectomy with the parameters after total gastrectomy, and to also determine the advantages of the postoperative nutritional states, a retrospective analysis was made to evaluate the nutritional status of patients with early gastric cancer who underwent proximal gastrectomy with those undergoing total gastrectomy. Forty-nine patients were studied for one year after surgery; 9 underwent proximal gastrectomy while 40 had a total gastrectomy. RESULTS: Proximal gastrectomy allowed the patient to better maintain both their nutritional parameters and body weight. CONCLUSIONS: Proximal gastrectomy was thus found to be a beneficial modality for early gastric cancer patients regarding terms of the postoperative nutritional status, in comparison to total gastrectomy.


Subject(s)
Gastrectomy/methods , Nutritional Status , Postoperative Complications/etiology , Stomach Neoplasms/surgery , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Neoplasm Staging , Retrospective Studies , Stomach Neoplasms/pathology
20.
Hepatogastroenterology ; 47(35): 1485-8, 2000.
Article in English | MEDLINE | ID: mdl-11100383

ABSTRACT

BACKGROUND/AIMS: Prognosis of scirrhous gastric cancer remains low. To determine the clinicopathological features that are correlated with prognosis, we studied long-term survivors of scirrhous gastric cancer (survival duration more than 5 years) in comparison with patients with short survival. METHODOLOGY: Among 2719 gastric cancer patients who underwent surgery at Matsuyama Red Cross Hospital, 211 cases were diagnosed as scirrhous type gastric cancer. Seventeen patients survived more than 5 years, and the rest had short survival (less than 5 years). Comparison of clinicopathological factors was done by chi 2 analysis. Multivariate analysis was done in order to focus on the prognostic factors. RESULTS: The 5-year survival of the total 211 patients was 12%. The 5-year survival of patients who underwent curative surgery (67 cases) was 30%, which was significantly higher than that of the non-curative surgery group (144 cases, 6%). Significant differences were noted in the following variables: peritoneal dissemination, hepatic metastasis, lymph node dissection, pattern of infiltrating growth, depth of invasion, histological lymph node metastasis, histological stage, and histological curability. Patients with either hepatic metastasis or peritoneal dissemination did not survive 5 years. Multivariate analysis revealed that the most significant independent prognostic factor was histological curability, followed by peritoneal dissemination. CONCLUSIONS: There is a possibility of long-term survival for patients with scirrhous gastric cancers without hepatic metastasis, peritoneal dissemination, or extensive lymph node metastasis. Curative surgery is important, suggesting that the extended operation is rational if possible.


Subject(s)
Adenocarcinoma, Scirrhous/mortality , Adenocarcinoma, Scirrhous/pathology , Stomach Neoplasms/mortality , Stomach Neoplasms/pathology , Adenocarcinoma, Scirrhous/surgery , Female , Humans , Male , Middle Aged , Prognosis , Stomach Neoplasms/surgery , Survival Rate
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