ABSTRACT
A 44-year-old woman with dyspnea on effort was admitted. Aortic stenosis and mitral stenosis and pulmonary hypertension were diagnosed. She underwent surgical treatment for her aortic valve and mitral valve by enlarging the aortic and mitral valve ring and replacing them by modified coupling valve methods. The postoperative course was uneventful and she was discharged on the 21st postoperative day.
ABSTRACT
Long-term hemodialysis remains a major risk factor for coronary artery bypass grafting (CABG). In our institution, a surgical strategy for these high risk patients is the complete coronary revascularization with off-pump CABG (OPCAB) using an arterial graft. However in cases of advanced functional disorder, we choose hybrid strategy or reduction strategy, namely the target of surgical intervention is just the key vessel. Aggressive usage of continuous hemodiafiltration (CHDF) to control water and electrolytic balance intra- and post-operatively is an alternative. This study aimed to elucidate whether our strategy is appropriate for hemodialysis patients. We enrolled 608 consecutive patients who underwent CABG between August 1999 and December 2006. Among them, 25 (4.1%) had received regular hemodialysis. As a control group, 100 patients were selected randomly among 583 patients excluding 25 hemodialysis patients. All patients had at least one major complication, and 13 had several major complications. The number of preoperative complications in hemodialysis patients is significantly higher than that of control group. Mean patient age was 66.3±8.7 years. The mean number of diseased vessels was 2.32±0.7, and that of anastomosis per patient was 2.4±1.2. All patients completed the procedure without cardiopulmonary bypass (CPB) as a result. Complete revascularization was performed in 22 (88%). The causes of non-completion were a hybrid strategy with PCI in one patient in the early period and a reduction strategy in 2 on account of social indications. Perioperative mortality was 0%, while the major complication was extended pleural effusion in 3 patients and slowly progressive sternal osteomyelitis in one. Mid-term results showed 2 cardiac deaths. The surgical outcome was equivalent in the hemodialysis group and the control group, though each preoperative state was not equal. Our strategy for patients undergoing chronic hemodialysis attained excellent perioperative and mid-term outcomes. We consider OPCAB produced better outcomes. CHDF is an important tool for use in surgical intervention in these patients.
ABSTRACT
A 51-year-old man developed a high fever with congestive heart failure after treatment for his dental caries and was admitted to our hospital. Transesophageal echocardiogram showed severe aortic regurgitation with a bicuspid aortic valve where vegetation and perforation was identified on its leaflets. Infective endocarditis caused by <i>Streptococcus constellatus</i> was diagnosed by blood culture. A computed tomography scan of the chest showed enlargement of his ascending aorta with a maximum diameter of 5.0cm. After treatment with antibiotics and diuretics for 60 days, he underwent surgical treatment for his aortic valve and ascending aorta. After excising the diseased aortic leaflets with vegetation, a mechanical prosthetic valve (Carbomedicus 23mm) was implanted. His ascending aorta was also replaced separately with a woven Dacron tube graft. There was an anomalous origin of the right coronary artery which was detached from the ascending aortic wall as a button and was implanted on the tube graft. Histologically the aortic wall showed disappearance of elastic fibers with myxomatous degeneration in the media. Immunohistochemical staining also revealed that matrix metalloproteinase-2 (MMP-2) was strongly expressed in the aortic media. The postoperative course was uneventful and he was discharged on the 37th postoperative day.