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1.
Front Endocrinol (Lausanne) ; 12: 681939, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34393997

RESUMO

Objectives: Evaluating the relationship between circulating metabolic biomarkers and semen parameters in obese, overweight and normal-weight patients. Methods: Patients were recruited at the "Andrology and Pathophysiology of Reproduction Unit", in Santa Maria Goretti Hospital. Divided into three groups were 98 participants (obese, overweight and normal-weight patients) according to BMI and were analyzed for three adipokines and six hormone peptides in blood serum and seminal plasma using Luminex assay. Standard semen analysis was performed for ejaculate volume, sperm concentration, total sperm count, motility, morphology and leukocytes. Results: In all groups of subjects, we observed a higher concentration of blood serum c-peptide, GIP, PAI-1, leptin, ghrelin and GLP-1 in comparison to seminal plasma; differently, higher levels in seminal plasma were observed for insulin and visfatin. In comparison to the non-obese subjects, obese subjects showed a higher blood serum concentration of c-peptide, GLP-1, GIP and leptin and a higher concentration of seminal plasma of GIP and insulin. Total sperm count, progressive motility, motility, and atypical forms directly correlated with PAI-1 and visfatin, whereas GLP-1 directly correlated only with total progressive motility. Conclusion: Obese men showed a different pattern of blood serum and seminal plasma adipokines and hormone peptides concentrations in comparison to normal-weight men. Furthermore, these molecules correlated with functional seminal parameters. Our findings support the option to consider these molecules as new biomarkers and pharmacological targets for a new therapeutic approach in male infertility. However, further studies identifying other potential biomarkers of male infertility with important clinical implication and characterizing their mechanisms of action are mandatory.


Assuntos
Hormônios/metabolismo , Obesidade/metabolismo , Peptídeos/metabolismo , Sêmen/metabolismo , Tecido Adiposo/metabolismo , Adulto , Biomarcadores/sangue , Biomarcadores/metabolismo , Hormônios/sangue , Humanos , Masculino , Pessoa de Meia-Idade , Nicotinamida Fosforribosiltransferase/metabolismo , Obesidade/sangue , Peptídeos/sangue
2.
Ann Surg Oncol ; 28(1): 222-230, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-32779050

RESUMO

OBJECTIVE: The purpose of this study was to evaluate the feasibility and safety in terms of prognostic significance and perioperative morbidity and mortality of cytoreduction in patients affected by advance ovarian cancer and hepato-biliary metastasis. METHODS: Patients with a least one hepatobiliary metastasis who have undergone surgical treatment with curative intent of were considered for the study. Perioperative complications were evaluated and graded with Accordion severity Classification. Five-year PFS and OS were estimated using the Kaplan-Meier curve. RESULTS: Sixty-seven (20.9%) patients had at least one metastasis to the liver, biliary tract, or porta hepatis. Forty-four (65.7%) and 23 (34.3%) patients underwent respectively high and intermediate complexity surgery according. Complete cytoreduction was achieved in 48 (71.6%) patients with hepato-biliary disease. In two patients (2.9%) severe complications related to hepatobiliary surgery were reported. The median PFS for the patients with hepato-biliary involvement (RT = 0 vs. RT > 0) was 19 months [95% confidence interval (CI) 16.2-21.8] and 8 months (95% CI 6.1-9.9). The median OS for the patients with hepato-biliary involvement (RT = 0 vs. RT > 0) 45 months (95% CI 21.2-68.8 months) and 23 months (95% CI 13.9-32.03). CONCLUSIONS: Hepatobiliary involvement is often associated with high tumor load and could require high complex multivisceral surgery. In selected patients complete cytoreduction could offer survival benefits. Morbidity related to hepatobiliary procedures is acceptable. Careful evaluation of patients and multidisciplinary approach in referral centers is mandatory.


Assuntos
Doenças do Sistema Digestório , Neoplasias Ovarianas , Carcinoma Epitelial do Ovário , Procedimentos Cirúrgicos de Citorredução , Feminino , Humanos , Neoplasias Ovarianas/cirurgia , Prognóstico , Estudos Retrospectivos
3.
Oncology ; 98(11): 807-813, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32892198

RESUMO

INTRODUCTION: Different imaging techniques were introduced to improve preoperative clinical staging of locally advanced cervical cancer (LACC) with transvaginal ultrasound (TV-US) or transrectal ultrasound (TR-US) representing a promising staging technique in the evaluation of the local extension of the disease for invasive tumors. The aim of this study was to evaluate the response to neoadjuvant chemotherapy (NACT) in LACC by 2D/3D ultrasound examination. MATERIALS AND METHODS: We prospectively enrolled patients affected by histologically and clinically confirmed LACC. All patients were scheduled for 3 cycles of platinum-based NACT followed by radical surgery. The ultrasound examination was performed at every cycle and within 10 days before surgery. The parameters evaluated were: the volume (automatically computed by the VOCAL software) and the mass vascularization. RESULTS: From March 2010 to March 2019, 157 women were recruited. Among these patients, 12 of them were excluded: 6 for the presence of distant metastases, 4 for rare histology, and 2 for severe comorbidities not allowing the protocol treatment. Seventeen patients after NACT were excluded because they were not amenable to radical surgery. Thus, 128 were considered for the final analysis of whom 106 (83%) were considered responders to NACT by histology. The sensibility and specificity of ultrasound with regard to the response to chemotherapy compared to histological specimen were 94 and 82%, respectively, with an accuracy of 92%. The positive predictive value and negative predictive value were 96 and 75%, respectively. Finally, we found that nonetheless there was a trend towards a continuous response to chemotherapy among patients who were considered responders to NACT at pathological examination; the major volume and vascularization index (VI) reduction were observed during the first 2 cycles (74, 71% and 47, 63%, respectively). On the contrary, non-responders showed an initial reduction of the VI (4.86 consisting of 33%, 95% CI 0.79-8.92, p = 0.013), but no significant modification in tumour volume along NACT. CONCLUSION: 2D/3D ultrasound is useful in assessing early response to NACT in patients with LACC.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias do Colo do Útero/diagnóstico por imagem , Neoplasias do Colo do Útero/tratamento farmacológico , Adulto , Idoso , Quimioterapia Adjuvante , Feminino , Humanos , Imageamento Tridimensional/métodos , Pessoa de Meia-Idade , Terapia Neoadjuvante , Estadiamento de Neoplasias , Estudos Prospectivos , Ultrassonografia/métodos , Neoplasias do Colo do Útero/cirurgia
4.
Neurobiol Aging ; 96: 79-86, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-32950781

RESUMO

In recent years, aberrant neural oscillations in various cortical areas have emerged as a common physiological hallmark across mouse models of amyloid pathology and patients with Alzheimer's disease. However, much less is known about the underlying effect of amyloid pathology on single cell activity. Here, we used high-density silicon probe recordings from frontal cortex area of 9-month-old APP/PS1 mice to show that local field potential power in the theta and beta band is increased in transgenic animals, whereas single-cell firing rates, specifically of putative pyramidal cells, are significantly reduced. At the same time, these sparsely firing pyramidal cells phase-lock their spiking activity more strongly to the ongoing theta and beta rhythms. Furthermore, we demonstrated that the antiepileptic drug, levetiracetam, counteracts these effects by increasing pyramidal cell firing rates in APP/PS1 mice and uncoupling pyramidal cells and interneurons. Overall, our results highlight reduced firing rates of cortical pyramidal cells as a pathophysiological phenotype in APP/PS1 mice and indicate a potentially beneficial effect of acute levetiracetam treatment.


Assuntos
Potenciais de Ação/efeitos dos fármacos , Doença de Alzheimer/tratamento farmacológico , Doença de Alzheimer/fisiopatologia , Amiloidose/tratamento farmacológico , Amiloidose/fisiopatologia , Lobo Frontal/citologia , Levetiracetam/farmacologia , Células Piramidais/fisiologia , Precursor de Proteína beta-Amiloide/genética , Animais , Modelos Animais de Doenças , Levetiracetam/uso terapêutico , Masculino , Camundongos Transgênicos , Presenilina-1/genética
5.
Minerva Ginecol ; 70(6): 754-760, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29644330

RESUMO

Polycystic ovary syndrome (PCOS) is a common female disorder with a pathogenesis still today not completely known. To the present, PCOS is considered more than just a reproductive disorder since several metabolic consequences that could affect women's health during different stages of reproductive and post-reproductive life were reported. The aim of the current review was to evaluate present evidence-based data regarding the pregnancy complications in infertile patients with PCOS. An extensive literature search until February 2018 was performed in PubMed, Medline, the Cochrane Library and Web of Science. Outcomes were classified in: early pregnancy complications, late pregnancy complications, perinatal complications, offspring health and long-term offspring and maternal health. Even if the exact mechanisms involved are still unclear, women with PCOS have an increased risk of pregnancy-related complications, such as gestational diabetes mellitus (GDM), pregnancy-induced hypertension (PIH), preeclampsia (PE), premature delivery and caesarean section. Moreover, the offspring of women with PCOS are also at increased risk of congenital anomalies and hospitalization in childhood. Further studies are needed to study the mechanism underlying pregnancy complications in PCOS and to identify any interventions to reduce the risk of obstetric and neonatal risks in women affected by PCOS and in their offspring.


Assuntos
Infertilidade Feminina/etiologia , Síndrome do Ovário Policístico/complicações , Complicações na Gravidez/epidemiologia , Cesárea/estatística & dados numéricos , Diabetes Gestacional/epidemiologia , Feminino , Humanos , Hipertensão Induzida pela Gravidez/epidemiologia , Gravidez , Complicações na Gravidez/etiologia , Resultado da Gravidez , Nascimento Prematuro/epidemiologia , Fatores de Risco
6.
J Obstet Gynaecol Res ; 39(1): 442-5, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22889418

RESUMO

Patients with 46,XY complete gonadal dysgenesis (Swyer syndrome) are characterized by the presence of female internal genital tract and bilateral streak gonads in a phenotypic female. These women have a high risk of developing rare type II malignant germ cell tumors. We report a rare case of a 33-year-old 46,XY female patient, who presented with an adnexal mass suspected for dysgerminoma, with a novel mutation of the sex-determining region on the Y chromosome consisting in the variant c.301C> G (p.L101V). Considering that effective screening is not available and the high risk of developing malignant neoplasm, prophylactic gonadectomy is mandatory.


Assuntos
Disgerminoma/genética , Disgenesia Gonadal 46 XY/genética , Neoplasias Ovarianas/genética , Proteína da Região Y Determinante do Sexo/genética , Adulto , Disgerminoma/complicações , Feminino , Disgenesia Gonadal 46 XY/complicações , Humanos , Mutação , Neoplasias Ovarianas/complicações
7.
Ann Thorac Surg ; 93(3): 1002-3, 2012 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-22365004

RESUMO

Cardiac rupture is a life-threatening event that often occurs after myocardial infarction and is often associated with significant death. Pericardiocentesis provides hemodynamic short-term improvement; however, patients with cardiac rupture require an emergency operation. This report describes a new procedure used to repair left ventricle free wall rupture after myocardial infarction. The technique described repairs the rupture off-pump and without the need for suturing. Midterm results demonstrate the feasibility and durability of this procedure.


Assuntos
Ruptura Cardíaca Pós-Infarto/cirurgia , Idoso , Procedimentos Cirúrgicos Cardíacos/métodos , Humanos
9.
Fertil Steril ; 90(5): 2015.e3-5, 2008 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-18394622

RESUMO

OBJECTIVE: To report a case of bilateral ovarian pregnancy in a young patient who had previously undergone intrauterine insemination (IUI) and controlled ovarian stimulation (COS). DESIGN: Case report. SETTING: University hospital. PATIENT(S): A 34-year-old woman who had previously undergone IUI and COS. INTERVENTION(S): Emergency exploratory laparotomy for circulatory collapse. About 350 mL of bloody fluid was collected in the pelvic cavity. The left ovary was about 6 cm in diameter and was completely involved by a darkish hemorrhagic ovarian mass; the right ovary was involved by a 4-cm mass. A left ovariectomy and a partial resection of the right ovary with preservation of two-thirds of ovarian tissue was performed. MAIN OUTCOME MEASURE(S): IUI and COS outcome. RESULT(S): The pathologic diagnosis was considered, and bilateral ovarian pregnancy was confirmed according to the diagnostic criteria described by Spiegelberg. CONCLUSION(S): Diagnosis of primary ovarian pregnancy is very difficult because of its rarity and asymptomatic state before rupture. However, early diagnosis is fundamental to avoid more serious complications and an emergency invasive procedure.


Assuntos
Infertilidade Feminina/terapia , Inseminação Artificial/efeitos adversos , Ovário/patologia , Indução da Ovulação/efeitos adversos , Gravidez Ectópica/patologia , Dor Abdominal/etiologia , Adulto , Gonadotropina Coriônica Humana Subunidade beta/sangue , Feminino , Humanos , Ovariectomia , Ovário/cirurgia , Gravidez , Gravidez Ectópica/etiologia , Gravidez Ectópica/metabolismo , Gravidez Ectópica/cirurgia , Choque/etiologia , Resultado do Tratamento , Ultrassonografia Pré-Natal
10.
J Minim Invasive Gynecol ; 15(2): 166-71, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18312985

RESUMO

STUDY OBJECTIVE: Classic myomectomy was performed via laparotomy. More recently, laparoscopic myomectomy has become a valuable treatment option. Vaginal myomectomy is a surgical procedure that has recently been evaluated. However, few trials have been reported in past literature. The aim of this study was to evaluate feasibility and complication rate of patients submitted to vaginal myomectomy. DESIGN: Prospective study with review of literature (Canadian Task Force classification II-2). SETTING: Department of Obstetrics and Gynecology, S. Filippo Neri Hospital of Rome, Italy. PATIENTS: Consecutive patients with symptomatic myomas who refused hysterectomy. INTERVENTIONS: After preoperative assessment, patients were submitted to vaginal myomectomy using posterior colpotomy. MEASUREMENTS AND MAIN RESULTS: Operative time, perioperative complications, and hospital stay were prospectively recorded. Follow-up examinations were performed at 1 and 12 months postoperatively. Data on possible symptoms, fertility, and pregnancy outcome during follow-up periods were recorded. Myomectomy was completed vaginally in 17 (94%) of 18 patients. Mean operating time was 48 +/- 22 minutes; mean operative blood loss and hospital stay were 210 +/- 350 mL and 3.5 +/- 2.4 days, respectively. Only 2 (11%) patients required blood transfusion. Three patients have conceived spontaneously. CONCLUSION: Vaginal myomectomy is a feasible and safe surgical procedure, with low morbidity and short hospital stay, and could represent a valid alternative to open or laparoscopic myomectomy in selected cases.


Assuntos
Procedimentos Cirúrgicos em Ginecologia/métodos , Leiomioma/cirurgia , Neoplasias Uterinas/cirurgia , Adulto , Colpotomia , Estudos de Viabilidade , Feminino , Humanos , Tempo de Internação , Projetos Piloto , Estudos Prospectivos , Resultado do Tratamento
11.
J Thorac Cardiovasc Surg ; 132(3): 475-80, 480.e1-8, 2006 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-16935098

RESUMO

OBJECTIVES: We sought to evaluate the effectiveness of tranexamic acid in off-pump coronary artery bypass grafting surgery, either when used in combination with mechanical cell salvage or when used alone. METHODS: One hundred patients were randomized to either 2 g of tranexamic acid as an intravenous bolus before sternotomy or to placebo. Intraoperative and postoperative cell salvage was used in all patients. The primary end point was early postoperative blood loss (within 4 hours). To evaluate the efficacy of tranexamic acid in isolation, we also performed a meta-analysis of 4 randomized trials identified from a systematic literature search. The primary end point of the meta-analysis was red cell transfusion. RESULTS: In our randomized trial patients in the tranexamic acid group had a significant reduction in early postoperative blood loss, (median difference, 50 mL; 95% confidence interval, 15-100 mL; P < .01); however, there was no reduction in the frequency of blood component transfusion. Patients in the placebo group received a significantly larger volume of autotransfused red cells (median difference, 120 mL; 95% confidence interval, 0-220 mL; P = .02). The meta-analysis demonstrated a significant reduction in red cell transfusions in patients receiving tranexamic acid compared with those receiving placebo (risk ratio, 0.48; 95% confidence interval, 0.24-0.97; P = .041). There was also a reduction in the frequency of any allogeneic blood component transfusion, as well as a highly significant reduction in postoperative blood loss, in patients receiving tranexamic acid (P < .001). CONCLUSIONS: Tranexamic acid reduces blood loss and transfusion requirements in off-pump coronary artery bypass grafting surgery. A reduction in allogeneic blood transfusion was not evident in the presence of perioperative cell salvage. These data support the routine use of tranexamic acid in off-pump coronary artery bypass grafting surgery.


Assuntos
Transfusão de Sangue Autóloga , Ponte de Artéria Coronária sem Circulação Extracorpórea , Transfusão de Eritrócitos , Fibrinolíticos/uso terapêutico , Ácido Tranexâmico/uso terapêutico , Adulto , Terapia Combinada , Feminino , Humanos , Masculino , Ensaios Clínicos Controlados Aleatórios como Assunto
12.
Gynecol Oncol ; 100(3): 612-4, 2006 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-16249017

RESUMO

BACKGROUND: In invasive ovarian cancer, fertility saving surgery is confined to early-stage and low-grade disease, and only few study reported sparing fertility up to FIGO stage IC ovarian cancer. CASE: We present a rare case of a 30-year-old woman affected by IC ovarian cancer with borderline tumor on controlateral ovary who underwent "conservative" debulking surgery followed by adjuvant chemotherapy. A spontaneous planned pregnancy occurred 5 years postsurgery. At 60-month follow-up, patients have no evidence of disease. CONCLUSIONS: Nowadays, preservation of ovarian function in women with tumors in early stage should be evaluated for conservative surgery. It is important to emphasize that patients selected for conservative surgery should have complete surgical staging. Careful follow-up is mandatory to ensure safety of this procedure.


Assuntos
Nascido Vivo , Neoplasias Ovarianas/cirurgia , Adulto , Quimioterapia Adjuvante , Feminino , Fertilidade , Humanos , Neoplasias Ovarianas/tratamento farmacológico , Neoplasias Ovarianas/patologia , Gravidez
13.
Ital Heart J Suppl ; 5(10): 806-15, 2004 Oct.
Artigo em Italiano | MEDLINE | ID: mdl-15615352

RESUMO

BACKGROUND: Surgical revascularization employing bilateral internal mammary arteries (IMAs) is an excellent procedure in elective surgery, but its role in urgent/emergent procedures is still debating. This retrospective study evaluates the feasibility, safety and surgical early outcomes of employing double skeletonized IMAs in patients with unstable angina (UA) undergoing urgent/emergent revascularization. METHODS: From January 1997 to May 2004, 824 patients (491 males, 333 females, mean age 64 +/- 12 years) underwent urgent revascularization for UA. Bilateral IMAs were employed in 346 (42%) patients (group B) and isolated and/or saphenous vein grafts in the remaining 478 (58%) patients (group M). There were no significant differences in preoperative risk factors between the two groups (mean EuroSCORE value). RESULTS: Postoperative stay was free from complications in 87% of patients of group B and 91% of group M. In-hospital mortality (group B 5.9%, group M 5.3%, p = NS) and perioperative myocardial infarction (group B 2.2%, group M 1.96%, p = NS), mean coronary care unit stay and total hospital stay were similar in both groups. Actuarial survival at 1, 3, 5 and 7 years was respectively 98.7, 97.5, 96.9 and 96.1% in group B and 99, 93.4, 92.1 and 88.4% in group M (p < 0.05). At a mean follow-up of 6.6 years the event-free survival (p = 0.021) and reoperation-free cardiac survival (p = 0.003) were better in group B. Multivariate analysis identified that age > 65 years (p = 0.01), congestive heart failure (p = 0.001), left ventricular ejection fraction < 35% (p = 0.03), and > 1 ischemic irreversible area (p = 0.02) are negative predictors for reoperation-free cardiac survival. The employment of the left IMA (p = 0.006) and of both IMAs (p = 0.001) were positive predictors for the overall survival and reoperation-free cardiac survival. CONCLUSIONS: Our results show that the use of skeletonized bilateral IMAs is associated with an acceptable risk and a lower incidence of postoperative complications in patients with UA, improving late outcomes in this group of patients.


Assuntos
Angina Instável/cirurgia , Ponte de Artéria Coronária , Análise Atuarial , Idoso , Emergências , Estudos de Viabilidade , Feminino , Seguimentos , Humanos , Masculino , Artéria Torácica Interna , Pessoa de Meia-Idade , Análise Multivariada , Complicações Pós-Operatórias , Reoperação , Estudos Retrospectivos , Fatores de Risco , Veia Safena/transplante , Fatores de Tempo , Resultado do Tratamento
14.
J Card Surg ; 19(5): 464-70, 2004.
Artigo em Inglês | MEDLINE | ID: mdl-15383062

RESUMO

OBJECTIVES: The aim of this study was to evaluate the early postoperative outcome in patients undergoing "omega-anastomosis" construction, a technique that permits revascularization of coronary bifurcations employing a single arterial graft. MATERIALS AND METHODS: Between January 2000 and March 2002, omega-anastomosis was employed in 12 patients. The main indication for omega-anastomosis construction was the presence of a significant stenotic lesion involving one of the coronary tree's bifurcations, presenting a relevant secondary branch. There were ten men and two women, with a mean age of 55.4 +/- 4.3 years (range 48 to 66). The omega-anastomosis was constructed employing a single arterial graft (internal mammary artery or radial artery) effectively tailored to obtain a bi-petal shape and anastomosed to the coronary bifurcation according to a three-foliate anastomosis. All patients underwent postoperative coronary angiography. RESULTS: There were no hospital deaths, neither ECG nor enzymatic alterations. One patient was reoperated for excessive bleeding. The mean aortic cross-clamp time and duration of CPB (cardiopulmonary bypass) were 64 +/- 18 minutes (range 45 to 108) and 89 +/- 26 minutes (range 67 to 135), respectively. Thirty-four arterial conduits were used: 12 LIMA, 12 RIMA, and 10 RA. Twelve omega-anastomoses were constructed, in six patients employing the RA, and in six other patients employing one of the internal mammary arteries (IMAs). Five left Y-grafts between the in situ LIMA and free LIMA graft and one right Y-graft between the RIMA and RA were constructed. The mean ICU stay was 14.4 +/- 5.7 hours. The postoperative coronary angiography revealed a good patency of the "omega-anastomosis." Transthoracic color Doppler echocardiography (TTECD) demonstrated a normal IMAs flow pattern in all cases. CONCLUSIONS: We define the reported configuration as a possible surgical alternative to achieve total arterial myocardial revascularization in multi-vessels patients, associated with excellent postoperative outcome that should be part of the coronary surgical armamentarium.


Assuntos
Anastomose de Artéria Torácica Interna-Coronária/métodos , Artéria Radial/transplante , Idoso , Anastomose Cirúrgica/métodos , Ponte de Artéria Coronária , Estenose Coronária/cirurgia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Resultado do Tratamento
15.
Cardiovasc Res ; 63(3): 528-36, 2004 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-15276478

RESUMO

OBJECTIVES: The relationship between atrial stretching and changes in cell excitability is well documented. Once stretched, human atrial myocytes (HuAM) release atrial natriuretic peptide (hANP). Receptors for hANP (NPR) are coupled to a guanylyl cyclase (GC) activity, and are present on HuAM, but the electrophysiological effects of hANP are largely unknown. We investigated the effect of hANP on If, the hyperpolarization-activated current present in HuAM, and the underlying intracellular pathway. METHODS: HuAM were isolated from atrial appendages and utilized for patch-clamp recording. RESULTS: hANP caused a significant and concentration dependent shift of the midpoint activation potential (DeltaVh) toward less negative potentials of 6.9 +/- 1.0 mV at 0.1 nM; 13.0 +/- 2.6 mV at 1 nM and 15.3 +/- 2.2 mV at 10 nM (p < 0.001 for all); a parallel increase of If rate of activation occurred. The effect of hANP was completely blocked by isatin, a potent antagonist of NPR (p < 0.01 vs. hANP). In the presence of the inhibitors of guanylyl cyclase (ODQ and LY83583), hANP caused a significantly smaller DeltaVh (p < 0.01 vs. hANP for both). 8Br-cGMP mimicked the effect of hANP, both in the presence and absence of KT5823, a selective inhibitor of Protein kinase G. Pretreatment with pertussis toxin (PTX) did not change the effect of hANP, thus excluding a major role for the coupling of NPR with the Gi-Proteins system. Pretreating cells with cyclopentyladenosine (CPA), an A1-adenosine receptor agonist, completely blocked hANP effect. Adding hANP to maximal serotonin concentration produced an additive response. CONCLUSIONS: Our data demonstrate for the first time that ANP is able to increase If, likely through a modulation of intracellular cGMP and cAMP levels. This effect could have implications in the relationship between stretch and arrhythmogenesis in the human atrium.


Assuntos
Adenosina/análogos & derivados , Fator Natriurético Atrial/farmacologia , Canais de Cálcio/efeitos dos fármacos , Miócitos Cardíacos/fisiologia , Adenosina/farmacologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Aminoquinolinas/farmacologia , Arritmias Cardíacas/metabolismo , Canais de Cálcio/metabolismo , Carbazóis/farmacologia , Proteínas Quinases Dependentes de GMP Cíclico/antagonistas & inibidores , Relação Dose-Resposta a Droga , Feminino , Guanilato Ciclase/antagonistas & inibidores , Átrios do Coração , Humanos , Indóis/farmacologia , Isatina/farmacologia , Masculino , Pessoa de Meia-Idade , Miócitos Cardíacos/efeitos dos fármacos , Técnicas de Patch-Clamp , Agonistas do Receptor Purinérgico P1 , Receptores do Fator Natriurético Atrial/antagonistas & inibidores , Serotonina/farmacologia , Transdução de Sinais/efeitos dos fármacos
16.
J Card Surg ; 19(2): 175-83, 2004.
Artigo em Inglês | MEDLINE | ID: mdl-15016061

RESUMO

OBJECTIVES: The aim of this report is to describe the rationale of our surgical approach, to explore the best management for complete atrioventricular septal defect associated with the tetralogy of Fallot (CAVSD-TOF), and to present our outcome in relation to the previously reported series. MATERIALS AND METHODS: Between January 1990 and January 2002, 17 consecutive children with CAVSD-TOF underwent complete correction. Nine patients (53%) underwent previous palliation. Mean age at repair was 2.9 +/- 1.9 years. Mean gradient across the right ventricular outflow tract was 63 +/- 16 mmHg. All children underwent closure of septal defect with a one-patch technique, employing autologous pericardial patch. Maximal tissue was preserved for LAVV reconstruction by making these incisions along the RV aspect of the ventricular septal crest. LAVV annuloplasty was performed in 10 (59%) patients. Six patients (35%) required a transannular patch. RESULTS: Three (17.6%) hospital deaths occurred in this series. Causes of death included progressive heart failure in two patients and multiple organ failure in the other patient. Two patients required mediastinal exploration due to significant bleeding. Dysrhythmias were identified in 4 of 11 patients undergoing a right ventriculotomy versus none of the patients undergoing a transatrial transpulmonary approach (p = ns). The mean intensive care unit stay was 3.2 +/- 2.4 days. Two patients required late reoperation due to severe LAVV regurgitation at 8.5 and 21 months, respectively, after the intracardiac complete repair. The mean follow-up time was 36 +/- 34 months. All patients survived and are in NYHA functional class I or II. The LAVV regurgitation grade at follow-up was significantly lower than soon after operation, 1.1 +/- 0.4 versus 1.7 +/- 0.5 (p = 0.002). At follow-up, the mean gradient across the right ventricular outflow tract was 17 +/- 6 mmHg, significantly lower than preoperatively (p < 0.001). CONCLUSIONS: Complete repair in patients with CAVSD-TOF seems to offer acceptable early and mid-term outcome in terms of mortality, morbidity, and reoperation rate. Palliation prior to complete repair may be reserved in specific cases presenting small pulmonary arteries or severely cyanotic neonates. The RVOT should be managed in the same fashion as for isolated TOF; however, a transatrial transpulmonary approach is our approach of choice.


Assuntos
Procedimentos Cirúrgicos Cardíacos , Comunicação Interatrial/cirurgia , Comunicação Interventricular/cirurgia , Tetralogia de Fallot/cirurgia , Ponte Cardiopulmonar , Criança , Proteção da Criança , Pré-Escolar , Seguimentos , Humanos , Lactente , Bem-Estar do Lactente , Itália , Complicações Pós-Operatórias/etiologia , Complicações Pós-Operatórias/mortalidade , Complicações Pós-Operatórias/fisiopatologia , Complicações Pós-Operatórias/cirurgia , Reoperação , Resultado do Tratamento
17.
J Thorac Cardiovasc Surg ; 126(5): 1302-13, 2003 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-14666000

RESUMO

BACKGROUND: The aim of this study was to investigate whether, by using the in situ right internal thoracic artery via the transverse sinus (eventually retrocaval), both the proximal and distal major branches of the circumflex system could be grafted and to evaluate the early and late outcome in these patients. METHODS: Between January 1997 and March 2002, 452 consecutive patients underwent grafting of the circumflex system with the in situ skeletonized right internal thoracic artery routed via the transverse sinus. The mean age was 62.4 +/- 10.3 years. A mean of 2.2 +/- 0.3 arterial grafts per patient were used, and 271 (60%) patients underwent total arterial myocardial revascularization. At 3 months after surgery, 86 patients (right Y or T graft) underwent echo color Doppler imaging before and after an adenosine provocative test. The mean follow-up was 27 +/- 8 months. RESULTS: The success rate of skeletonized right internal thoracic artery grafting to the circumflex system branch was 100%. There were 15 (3.4%) hospital deaths. In 116 patients who underwent postoperative angiography, the total patency rates of the right and left internal thoracic arteries were 94% and 96.6%, respectively. Strong predictors for nonfunctional internal thoracic artery grafts were a small internal thoracic artery caliber (P <.001), recipient coronary artery diameter less than 1.5 mm (P =.012), stenotic lesions of less than 60% (P =.016), and diffuse stenotic lesions (P =.015) of the recipient coronary artery. In 86 patients who underwent postoperative echo color Doppler imaging, the flow reserves at the main stem of the left and right internal thoracic arteries were 2.24 +/- 0.5 and 2.48 +/- 0.6, respectively. Cumulative actuarial survival at 3 years was 96.3%, and event-free cumulative survival was 93%. The Cox model revealed a left ventricular ejection fraction of less than 35% (P =.016), age greater than 70 years (P =.025), New York Heart Association grade greater than III (P =.0019), nontotal arterial myocardial revascularization (P =.002), and the preoperative presence of more than 1 ischemic area (P <.001) as strong predictors for poor overall cumulative event-free survival. CONCLUSIONS: The skeletonized right internal thoracic artery, placed via the transverse sinus and eventually retrocaval, can reach most branches of the circumflex system and is associated with an excellent patency rate. The predictors for poor overall event-free survival seem to be similar to those of the general population undergoing conventional coronary artery bypass grafting. Use of bilateral internal thoracic arteries and in situ right internal thoracic artery grafting via the transverse sinus offers the possibility of various configuration constructions, making possible total arterial myocardial revascularization with a minimum number of arterial conduits.


Assuntos
Ponte de Artéria Coronária/métodos , Doença da Artéria Coronariana/cirurgia , Anastomose de Artéria Torácica Interna-Coronária/métodos , Artéria Torácica Interna/transplante , Adulto , Idoso , Estudos de Coortes , Angiografia Coronária , Ponte de Artéria Coronária/mortalidade , Doença da Artéria Coronariana/diagnóstico por imagem , Doença da Artéria Coronariana/mortalidade , Ecocardiografia Doppler , Feminino , Seguimentos , Oclusão de Enxerto Vascular/diagnóstico por imagem , Oclusão de Enxerto Vascular/epidemiologia , Sobrevivência de Enxerto , Testes de Função Cardíaca , Humanos , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Complicações Pós-Operatórias/diagnóstico por imagem , Complicações Pós-Operatórias/epidemiologia , Probabilidade , Modelos de Riscos Proporcionais , Estudos Retrospectivos , Medição de Risco , Estatísticas não Paramétricas , Taxa de Sobrevida , Coleta de Tecidos e Órgãos , Resultado do Tratamento , Grau de Desobstrução Vascular
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