Asymptomatic Stanford Type A Aortic Dissection Developing after Off-Pump Coronary Artery Bypass Grafting with Right-Sided Aortic Arch / 日本心臓血管外科学会雑誌

A 69-year-old man with type II right-sided aortic arch (RAA) underwent an off-pump coronary artery bypass grafting (OPCAB) in December, 2017. He underwent an abdominal aortic aneurysm resection and graft replacement in April, 2018. The postoperative computed tomography (CT) that was performed in May 2018 revealed aortic dissection from the ascending aorta to the aortic arch, although he was asymptomatic. We evaluated the native coronary artery and patent bypass grafts by coronary CT. Graft replacement of the ascending aorta and partial aortic arch was carried out on an elective basis and the proximal anastomotic site of the vein grafts was attached to the prosthetic graft. Stanford type A aortic dissection (AAD) after previous coronary artery bypass grafting differs from spontaneous AAD in presentation, management and outcome. We report here a successful surgical case with RAA and AAD after OPCAB.

A Surgical Case of Ventricular Double Rupture after Acute Myocardial Infarction / 日本心臓血管外科学会雑誌

A 76-year-old woman with acute myocardial infarction (AMI) suddenly fell down with cardiogenic shock. Echocardiography showed free wall rupture (FWR), therefore emergency operation was performed under IABP and PCPS assistance. Seven days after initial operation, onset of ventricular septal perforation (VSP) was recognized. Eighteen days after initial operation, the infarct exclusion technique with a bovine pericardial patch was performed. She has been doing well 4 months after the operation with trivial residual shunt. Mechanical complications after AMI are classified as FWR, VSP, and papillary muscle rupture. A combination of any two types of these is called ventricular double rupture. Ventricular double rupture is a very rare condition, and its prognosis is poor. We report here a surgical case with ventricular double rupture after AMI.

Surgical Treatment of Cardiac Penetration Induced by Pericardiocentesis / 日本心臓血管外科学会雑誌

We report a case of surgical treatment of iatrogenic cardiac trauma. A patient with cardiac tamponade was treated by pericardiocentesis. During pericardiocentesis both right and left ventricles were perforated. These perforations were repaired in the beating heart state using 20 monofilament mattress sutures reinforced by felt pledgets. Iatrogenic cardiac trauma is rare. Fatal complications might arise when proper procedures are not followed during the placement of a catheter for pericardiocentesis. Here we present successfull surgical treatment of cardiac penetrations induced by pericardiocentesis.

Multiple Mycotic Aneurysms of the Thoracoabdominal Aorta and Abdominal Aorta / 日本心臓血管外科学会雑誌

A 59-year-old man had been treated at another institution for bacterial meningitis (<i>Streptococcus pneumoniae</i>). He had severe back pain and lumbago. Computed tomographic (CT) scanning of the chest and abdomen demonstrated saccular aneurysms at the diaphragm in the descending thoracic aorta and the infrarenal abdominal aorta. An extended left posterolateral retroperitoneal incision was performed for resection of the thoracoabdominal aneurysm and replacement of an <i>in situ</i> dacron graft with rifampicin using cardiopulmonary bypass. The abdominal aneurysm was resected and replaced by an <i>in situ</i> dacron graft with rifampicin. The grafts were covered with a pedicled omental flap. The tissue culture was negative. After subsequent intravenous antibiotic therapy for 2 months, the patient was discharged without any evidence of remaining infection.

A Case of Successful Treatment of Intraoperative Pulmonary Tumor Embolism Using Pulmonary Angioscopy under Cardiopulmonary Bypass / 日本心臓血管外科学会雑誌

The case involved a 73-year-old woman who underwent surgical resection for right renal cell carcinoma extending to the inferior vena cava. During surgery the tumor thrombus disappeared from the inferior vena cava. We performed transesophageal echocardiography and detected the tumor thrombus in the right ventricle. Therefore, we immediately tried to remove the thrombus using cardiopulmonary bypass. However, we could not find the tumor thrombus in the right ventricle or in the main pulmonary artery. We used angioscopy of the pulmonary artery and detected the tumor thrombus at the orifice of the inferior pulmonary artery. The tumor thrombus was removed under direct visualization. In the event of an intraoperative pulmonary embolism, simple and safe techniques for exact and rapid diagnosis are needed. Intraoperative angioscopy allows direct visualization of the pulmonary arterial branches and appears to be very useful for detection of tumor thrombi even in emergency cases.

Study of Plasma Levels of Brain Natriuretic Peptide (BNP) in the Late Phase after Aortic Valve Replacement / 日本心臓血管外科学会雑誌

This study was designed to assess the correlation of brain natriuretic peptide (BNP) levels with cardiac function and to determine the usefulness of BNP as a prognostic marker in patients undergoing cardiac valvular surgery. We measured plasma levels of BNP in 53 patients who had undergone aortic valve replacement (AVR) or aortic and mitral valve replacement (DVR) more than 1 year earlier. These cases were divided into the aortic stenosis (AS) group and an aortic regurgitation (AR) group. Fifty-two patients were in NYHA class I, and 43 (82.7%) of them had plasma levels of BNP above the normal range. There were significant correlations between the plasma levels of BNP and ejection fraction (EF) in both the AS and AR groups (<i>r</i>=-0.460, <i>p</i><0.05; <i>r</i>=-0.529, <i>p</i><0.01). In the AR group, BNP showed significant correlations with LVMI and LVDd (<i>r</i>=-0.469, <i>p</i><0.05; <i>r</i>=0.680, <i>p</i><0.0001), whereas, in the AS group, BNP showed no significant correlation with these factors. The most remarkable finding was the development of heart failure in 3 patients whose plasma levels of BNP were over 80pg/ml, despite remaining in NYHA I during follow-up. We concluded that plasma levels of BNP in a late phase after AVR or DVR can be an excellent biochemical marker for predicting of heart failure and overall prognosis.

The Early Repair of Postinfarction Ventricular Septal Perforation Performed with Normothermic Cardiopulmonary Bypass during Beating. A Case Report / 日本心臓血管外科学会雑誌

A 60-year-old woman underwent surgical treatment of postinfarction ventricular septal perforation (VSP) in the early phase after receiving total cardiopulmonary bypass without aortic occlusion. VSP developed four days after anterior myocardial infarction. On admission, inraaortic balloon pumping was used to obtain hemodynamic stabilization. On the day of admission, emergency total cardiopulmonary bypass was performed. VSP was closed with a Dacron felt patch positioned on the left side of the septum. The anterior wall of the left ventricle was closed with Dacron felt strips and reinforced using a Gore-Tex sheet. Postoperative hemodynamics improved significantly. Although the operation while the heart was beating was difficult technically, the total cardiopulmonary bypass time of this method was not longer than that of operations under cardioplegic arrest. Further more, the area of infarction was easily distinguished by color and bleeding. The surgery during normothermic heart beat was effective in preventing further ischemia of the myocardium. The surgical treatment of VSP in the early phase during normothermic heart beat under total cardiopulmonary bypass was considered to be more effective and safer than operations under cardioplegic arrest.