Mitral Valve Replacement for Mitral Regurgitation with Annular Calcification after Esophageal Resection and Retrosternal Gastric Tube Reconstruction / 日本心臓血管外科学会雑誌

A 79-year-old man developed congestive heart failure. He was given a diagnosis of severe mitral regurgitation with calcification of the posterior mitral annulus and secondary tricuspid regurgitation. He had a history of esophageal resection with retrosternal gastric tube reconstruction about 20 years previously. We replaced the mitral valve with a mechanical prosthesis and performed tricuspid ring annuloplasty through a right parasternal approach. We did not risk resecting the calcified annulus, but fixed the prosthesis and annulus with the equine pericardium in between as a cushion and collar, to prevent perivalvular leakage. The postoperative course was uneventful.

Mitral Valve Repair in a Patient with Partial Rupture of the Posterior Papillary Muscle after Acute Myocardial Infarction / 日本心臓血管外科学会雑誌

Papillary muscle rupture after acute myocardial infarction (AMI) is an infrequent but fatal complication. We report a case of mitral valve repair performed in a patient with partial papillary muscle rupture after AMI. An 85-year-old man was admitted to our hospital for AMI with cardiac shock. Emergency coronary angiography revealed triple-vessel disease, and percutaneous coronary intervention for the culprit lesion of the left circumflex artery was successfully performed. Eleven days after the onset of the AMI, the pulmonary artery pressure abruptly increased to 60 mmHg and a pansystolic murmur was detected. Transesophageal echocardiography showed severe mitral regurgitation (MR) with flail in the A1—A2 region of the anterior mitral leaflet. We demonstrated erratic motion of the ruptured anterior head in the left ventricle, and this was diagnosed as partial rupture of the posterior papillary muscle. Intra-aortic balloon pumping (IABP) was performed to maintain the systemic circulation. Four days after the onset of acute MR (15 days following AMI), we performed mitral valve repair with coronary artery bypass grafting. We reattached the ruptured head to the viable posterior head with pledget sutures and performed annuloplasty using Carpentier-Edwards classical ring M28. Postoperative echocardiography showed no MR, and the patient was uneventfully discharged on the 45th postoperative day.

A Recovery Case of Severe Heart Failure after Emergency Coronary Artery Bypass Grafting Supported by a Left Ventricular Assist System / 日本心臓血管外科学会雑誌

In general strategy for postcardiotomy heart failure includes inotropic support followed by the use of an intra-aortic balloon pump and percutaneous cardiopulmonary bypass support (POPS). The insertion of a ventricular assist system (VAS) may become necessary when these procedures fail to restore hemodynamic stability. The ABIOMED BVS 5000 left ventricular assist support system (LVAS) has been approved for clinical use in Japan since 1998. Here we describe our experience with the recovery of a 52-year-old man from postcardiotomy heart failure after using an ABIOMED BVS 5000 LVAS. The patient was admitted to our institution with dyspnea. Heart failure with severe left ventricular dysfunction was diagnosed, and recent myocardial infarction was suspected from his history and electrocardiogram. Two days after admission, ventricular fibrillation occured and the arrythmia was hard to control. PCPS was connected and emergency coronary angiography showed triple vessel disease. We performed emergency coronary artery bypass grafting with the heart beating under PCPS and immediately implanted an ABIOMED BVS 5000 device to achieve myocardial recovery after stopping PCPS. He was weaned from the LVAS at 6 days after surgery. His postoperative course was relatively uneventful and he was discharged after recovery.

Surgical Treatment of Aortic Valve Regurgitation due to Infective Endocarditis Associated with Congenital Quadricuspid Aortic Valve / 日本心臓血管外科学会雑誌

An isolated quadricuspid aortic valve is an extremely rare congenital anomaly and there have been few surgical case reports published. A 47-year-old man with untreated diabetes mellitus was admitted to our institution because of fever and dyspnea. Transesophageal echocardiography showed severe aortic valve regurgitation and a quadricuspid valve with vegetations. Blood culture revealed <i>Streptococcus agalactiae</i>. Despite administration of antibiotics and treatment of his heart failure, the infection and heart failure were not controlled. Therefore, we performed aortic valve replacement in the presence of active infective endocarditis. The aortic valve had 2 equal-sized larger cusps and 2 equal-sized smaller cusps. There were vegetations on each cusp and an annular abscess was detected. The resection site of the abscess was reinforced with an autologous pericardial patch, and the aortic valve was replaced using a 21-mm SJM valve. His postoperative course was uneventful and he was discharged after recovery.

Stroke after Coronary Artery Bypass Grafting / 日本心臓血管外科学会雑誌

Risk factors for stroke after coronary artery bypass grafting (CABG) were assessed. We retrospectively investigated 681 consecutive patients who underwent isolated, first-time CABG at our institute between 1987 and 1998. Ninety-eight patients (14%) had a history of preoperative stroke. They tended to be older and with a higher incidence of peripheral vascular disease (PVD) than those without preoperative stroke. In spite of several techniques for prevention of postoperative stroke, such as the aortic non-touch technique, 14 patients (2.0%) suffered postoperative stroke. Postoperative stroke was diagnosed soon after surgery in 7 patients (50%), and the causes of stroke in these patients seemed to be intraoperative manipulation of the ascending aorta in 5, and hypoperfusion during cardiopulmonary bypass in two. Stroke in the remaining 7 patients occurred after normal awakening from anesthesia, and the cause was unknown. We then compared the patients with postoperative stroke (<i>n</i>=14) to those without postoperative stroke (<i>n</i>=667). Statistical analysis demonstrated no significant difference between the two groups in variables such as history of preoperative stroke, duration of cardiopulmonary bypass, and prevalence of PVD. Four (29%) of the patients with postoperative stroke died, due mainly to aspiration pneumonia. The morbidity and mortality of the patients who suffered postoperative stroke were very high.

Percutaneous Transluminal Coronary Angioplasty before Repair of an Aortic Aneurysm: Initial and Late Results / 日本心臓血管外科学会雑誌

Patients with an aortic aneurysm have a high incidence of coronary artery disease. Percutaneous transluminal coronary angioplasty (PTCA) has not established as a safe, effective procedure in patients with an aortic aneurysm. From November 1987 to November 1993, 5 patients underwent PTCA prior to aortic aneurysm repair. Three patients had abdominal aortic aneurysm and 2 had thoracic aortic aneurysm. There were 4 men and 1 woman whose mean age was 68 years (range 63 to 76). In 4 patients primary success of PTCA was achieved. The remaining 1 patient failed PTCA and underwent emergency coronary bypass surgery. Early mortality was 0%. All five were followed up after aneurysm repair for a mean of 28 months (range 12-66 months). There was no myocardial infarction or death. These results indicate that PTCA prior to aneurysm repair is a relatively safe and effective procedure, particularly in elderly patients with an aortic aneurysm.