ABSTRACT
With increasingly elderly patients and also increasing numbers of patients with ischemic heart disease, the number of cases requiring coronary artery bypass grafting (CABG) combined with aortic valve surgery has recently been steadily increasing. In addition, the management of asymptomatic aortic valve diseases at the time of CABG still remains controversial. The purpose of this study was to evaluate the early and late prognoses of patients undergoing a simultaneous aortic valve replacement (AVR) and CABG. Between January 1988 and December 1997, 17 patients underwent AVR and CABG. According to the pressure gradient, the patients were divided into four groups: five with aortic regurgitation (AR), two with mild aortic stenosis (AS), six with moderate AS and four with severe AS. The mean number of distal coronary anastomoses was 1.8 and a mechanical prosthesis was used in all cases. Hospital death occurred in one case with severe AS. The postoperative complications consisted of one mild AS case with transient complete atrio-ventricular block, two cases with a new cerebral infarction, one case with loss of consciousness, one moderate AS case with perioperative myocardial infarction, and one each of severe AS with, respectively, multiple organ failure, congestive heart failure (CHF) and acute renal failure. In addition, three valve-related complications were also observed. Late death occurred in two cases: one due to a cerebrovascular accident and one due to CHF. Both the early and late outcomes of the patients undergoing the above described simultaneous operation were satisfactory, suggesting that this combined operation is therefore considered to be an effective surgical modality for the treatment of ischemic heart disease patients.
ABSTRACT
Complete revascularization of the coronary artery was performed in a 73-year-old man who had severe stenosis of the bilateral subclavian and left vertebral arteries and severe calcification of the ascending aorta. At first, we performed CABG (coronary artery bypass grafting) on the LAD (left anterior descending artery) and the RCA (right coronary artery) without cardiopulmonary bypass. <i>In-situ</i> GEA (gastroepiploic artery) was anastomosed to the LAD and SVG (saphenous vein graft) was anastomosed to 4 PD (4 posterior descending artery) of the RCA. The right brachiocephalic artery was selected as the site of the proximal anastomosis of the SVG. A Palmaz-Schatz stent was then held in place in the LCX (left circumflex artery) postoperatively. The combination of CABG without cardiopulmonary bypass and PTCA was a safe method for preventing cerebrovascular complications in a patient with a severely calcified artery.
ABSTRACT
From July 1984 to June 1998, 159 patients with infrarenal abdominal aortic aneurysms (AAA) were surgically treated in our hospital by the extended retroperitoneal (ERP) approach described by Williams et al. There were 132 men and 27 women, with a mean age of 69.3 years. Of the 159 patients, 82 (52%) had hypertension, 62 (39%) had coronary artery disease, of which 20 cases had previously received coronary artery bypass grafting, 17 (11%) had diabetes, 16 (10%) had thoracic aortic disease, 15 (9.4%) had cerebrovascular disease, and 14 (8.8%) had chronic renal dysfunction, including 6 cases on hemodialysis. Among these patients treated with this approach, 67 cases underwent tube grafting and 92 received Y-grafting. Patent inferior mesenteric arteries were ligated in all cases except one. Postoperative morbidity was observed in 54 cases (34%); lower extremity ischemia including microembolism or acute graft occlusion in 13, abdominal complication including paralytic ileus, liver dysfunction, or gastrointestinal hemorrhage in 11, wound complication in 9, pulmonary in 7, cardiac in 6, cerebral in 4, and the others in 4. No patient suffered ischemic colitis. There was hospital mortality in 4 cases (2.5%). Two patients died because of myonephropathic metabolic syndrome on second postoperative day. Two patients with combinations of several co-existing diseases died because of respiratory failure or multi-organ failure on the 48th and 141st postoperative day. Oral feeding was restarted at a mean of 2.7 days after the operation, and 64% of the cases did not require blood products. The mean postoperative hospital stay of survivors was 16.9 days (range, 7-63 days). Based on our clinical experience, we believe that the ERP approach is a safe and useful procedure for elective surgery for AAA to enable fast recovery and short hospital stay, especially in older and high-risk patients.
ABSTRACT
A 64-year-old woman, with no findings of Marfan's syndrome, was addmited with dyspnea on exsertion. She had a family history of thoracic aortic disease. Moderate aortic regurgitation was diagnosed due to mild annulo-aortic ectasia (AAE) limited in the sinuses of Valsalva with moderately impaired left ventricular function. The aortography showed that the diameters of the ascending aorta, the aortic root, and the aortic ring were 38mm, 48mm, and 23.5mm. We planned aortic valve replacement, as the AAE was small and was limited in the sinuses of Valsalva, but she sufferd from A type acute dissection combined with AAE, while waiting for operation. As she fell into deep shock and cardiac arrest caused by cardiac tamponade, an emergency operation was done. The intimal tear was found in the ascending aorta, but no organic change was seen on the three cusps of the aortic valve. Total aortic root replacement with Cabrol's procedure was performed successfully. We recommend that AR with AAE should be performed with aortic root reconstruction in such cases because AAE is often combined with aortic root dissection, even if the aortic root size is small.
ABSTRACT
The authors examined the frequency of thromboembolism and bleeding complications in cases of mechanical valve replacement during the past 5 years in the Tokyo area. There were 21 cases of thromboembolism and 15 cases of bleeding complications. Analyzing these cases with regard to anticoagulant therapy, 71% of the thromboembolism cases and 47% of the bleeding complication cases had 10∼25% result on the thrombotest at the time of the event. Consequently, in cases of mechanical valve replacement it is necessary to reevaluate the therapeutic range of the thrombotest results. This was a retrospective study of a TAS (The Tokyo area anticoagulation study for cardiac valve replacement by using PT-INR) trial and we intend to carry out a prospective study on the therapeutic range of the thrombotest and PT-INR.
ABSTRACT
The authors employed a modified CABG procedure to avoid cerebral infarction in cases of calcified ascending aorta. Among 348 cases of CABG surgery, we used the modified procedure in 14 cases (4%). The mean age was 66. Four patients had a history of previous stroke and one patient had arteriosclerosis obliterans. Our strategy is, (1) use femoral or aortic arch cannulation for cardiopulmonary bypass (CPB), (2) maximal use of <i>in-situ</i> arterial graft, (3) graft-coronary anastomosis under ventricular fibrillation (Vf) without aortic cross clamp, (4) proximal anastomosis of saphenous vein graft (SV), if used, was made at the arterial graft, otherwise direct anastomosis to the aorta was made under circulatory arrest. The internal thoracic artery (ITA) was used in 18 cases and the gastroepiploic artery (GEA) was used in 8 cases, SV was used in 4 cases. The mean Vf time was 48min and mean CPB time was 94min. The peak CPK was 805U and the peak CPK-MB was 52U. There was no significant difference between modified and conventional procedures in terms of operation time and myocardial protection. No cerebrovascular complication was noted with the modified procedure. In conclusion, the modified technique is safe for atherosclerotic-ascending aorta in CABG.
ABSTRACT
A 59-year-old man, who had received graft replacement for the “inflammatory” abdominal aortic aneurysm two years previously was admitted to our hospital because of preshock caused by intermittent intestinal hemorrhage. Gastrointestinal endoscopy revealed an ulcer at the 3rd portion of the duodenum. As aortoenteric fistula was diagnosed and he underwent an emergency operation. After initial axillo-bifemoral bypass grafting, the aortic graft was removed and the aortic stump was closed directly. The duodenal rent was closed by Albert-Lembert suture, He survived the operation and was discharged. We suggest that extra-anatomic bypass is safer than <i>in situ</i> graft replacement in patients with secondary aortoenteric fistula after operation for “inflammatory” abdominal aortic aneurysm, because adjacent organs adhere firmly to the proximal suture line in such cases.
ABSTRACT
Our experience with 13 patients (mean age 52, range 35-71 years) undergoing pericardiectomy at Mitsui Memorial Hospital in the 13 years (from 1977 to 1990) has examined with clinical features and M-mode echocardiographic study. Preoperatively, the patients were either in N. Y. H. A. Functional Class III (11 cases), or Class IV (2 cases). Median sternotomy without using cardiopulmonary bypass was employed in all cases. The area of the right ventricle, atria, cavae, pulmonary veins and left ventricle where can be reached without cardiopulmonary bypass or other hemodynamic support were decorticated completely, and the posterior portion of the left ventricle were not decorticated partially. Intraoperative hemodynamic responses were observed between before and after pericardiectomy monitored by Swan-Ganz catheter; central venous pressure (CVP) were changed from 21.3±5.6 to 13.6±4.0cmH<sub>2</sub>O, pulmonary artery diastolic pressure (PADP) were changed from 19.8±5.5 to 11.3±6.6mmHg, cardiac index (CI) were changed 2.14±1.34 to 3.16±1.73<i>l</i>/min/m<sup>2</sup>. There were no early deaths and no late heart complicated deaths. There were 2 cases died, one for advanced gastric carcinoma and another for wide cerebral infarction whthin 3 years from pericardiectomy. M-mode echocardiographic study that were examined between preoperative and late postoperative periods (mean follow-up time 51 months) showed effective recovery in cardiac function; left ventricular end-diastolic volume index (LVEDVI) were from 34.3±12.1 to 39.5±14.5ml/m<sup>2</sup>, left ventricular end-systolic volume index (LVESVI) were from 17.2±7.8 to 13.1±6.7ml/m<sup>2</sup>, stroke index (SI) were from 17.1±7.3 to 26.6±12.5ml/m<sup>2</sup>, ejection fraction (EF) were from 45.1±19.2 to 61.2±22.5%, mean velocity of circumferential fiber shortening (mean Vcf) were from 0.80±0.35 to 1.13±0.53circ/sec. All the patients showed functional improvement; 9 are in N. Y. H. A. Functional Class I, and 4 are in Class II. These findings would be permitted this procedure with median sternotomy for chronic constrictive pericarditis as one of a safety and effective method conventionally.
ABSTRACT
Three cases of LMCAP for the isolated LMCA stenosis were presentd. In two cases of the proximal LMCA stenosis, the connective tissue between the ascending aorta and the main pulmonary artery was prepared to detect the LMCA. From the left lateral wall of the ascending aorta to the anterior wall of the LMCA over the stenotic lesion was excised and the saphenous vein patch was sutured (anterior approach). In the third case, because the stenosis was locarized at the distal LMCA, the patch angioplasty using the saphenous vein was performed by direct opening of the distal LMCA accessed from the left lateral side of the main pulmonary artery without aortotomy (lateral approach). Ultrasonic cuser was quite useful to isolate the LMCA. LA-LV vent was indispensable to obtain the non-blood clean operation field. All three cases showed the successful enlargement of LMCA at the postopeorative coronary angiography.
ABSTRACT
We report a 68 old male, who underwent coronary artery bypass using left internal mammary artery, right gastroepiploic artery, and saphenous vein graft and ascending aorta to bifemoral bypass using polytetrafluoroethylene graft, under the diagnosis of severe three coronary arterial disease and bilateral occlusive illiac arterial disease. The procedure of ascending aorta to bifemoral bypass is considered to have the advantage compared with traditional femoral by passes especially combined coronary and femoral arterial revascularization is needed.