Successful Surgical Management of Lipoma in the Right Ventricle / 日本心臓血管外科学会雑誌

We report a rare case of lipoma arising from the right ventricle. A 66-year-old woman was admitted to our hospital for exertional chest pain and fatigability. She was diagnosed of mild aortic stenosis and regurgitation (ASR), mild mitral regurgitation (MR), and asymptomatic cardiac tumor in the right ventricle about two years previously, for which she had been followed up at other local hospital. A recheck transthoracic echocardiography revealed moderate MR. No evidence of deterioration of ASR and cardiac lipoma were detected. The patient underwent mitral annuloplasty and replacement of aortic valve, plus resection of the right ventricle tumor through the tricuspid valve. Pathological examination of the resected tumor showed mature adipose tissue infiltrated into normal cardiac muscle without atypical cells, which suggested intramyocardial lipoma. Postoperative course was uneventful. Fourteen months after the operation, the patient remains asymptomatic and regular echocardiographic checkup demonstrates no tumor recurrence or residual MR.

Investigation of Mitral Valve Replacement in a Patient with Mitral Valve Stenosis Who Complicated with Myelodysplastic Syndrome and Left Atrial Thrombosis / 日本心臓血管外科学会雑誌

Patients with myelodysplastic syndrome (MDS) most commonly have refractory anemia accompanied by various degrees of granulocytopenia and thrombocytopenia. At the time of cardiac surgery, both major infections and bleeding are severe complications in patients with pancytopenia due to MDS. However, there were very few patients with MDS who had undergone open-heart surgery. We reported a case of mitral valve replacement in a patient with MDS. A 68-year-old man with valvular heart disease and MDS, with a platelet count of 1.9×10⁴/mm³, underwent successful mitral valve replacement. The mitral valve was replaced by an SJM 25 A prosthesis after resection of left atrial thrombosis using cardiopulmonary bypass. Platelets were transfused after the bypass. Perioperative hemorrhage was moderate and postoperative course was uneventful. We evaluated platelet function by Sonoclot coagulation and a platelet function analyzer. We did not need a large amount of transfusion of red blood cells and platelets, and prevented major bleeding and severe wound infections in the acute postoperative state.

Coronary Artery Bypass Grafting for Patients in Whom Preoperative Angiography Determined That the In Situ Left Internal Thoracic Artery Could Not Be Used / 日本心臓血管外科学会雑誌

Use of the internal thoracic artery for myocardial revascularization has regained general acceptance because it offers better long-term results than do venous conduits. However, according to angiographic studies, it has been reported that atherosclerotic changes in the internal thoracic artery occurred in 1-5% of patients with coronary artery disease, although, generally, it is considered that atherosclerotic changes in internal thoracic artery are rare. From January 1998 to August 2001, of the 274 patients who underwent coronary artery bypass grafting, it was estimated that the left internal thoracic artery could not be used for coronary revascularization by preoperative angiography in 7 patients (7/262=2.7%). Two hundred sixty-two patients underwent preoperative angiography to evaluate the grafts for coronary revascularization. All were men and age at the time of operation ranged from 62 to 81 years (mean, 68.6 years). The reason for the left internal thoracic artery being useless were occlusion or stenosis of the subclavian artery in 4 and stenosis or occlusion of the left internal thoracic artery in 3. One patient needed an emergency operation. Four patients had a history of myocardial infarction, 3 patients had hypertension, 2 patients had diabetes mellitus, 4 patients had hyperlipidemia, 1 patient had aortitis and 3 patients had a history of percutaneous transluminal coronary angioplasty. There were 4 patients with peripheral vascular disease. Four right internal thoracic arteries, 9 radial arteries and 6 gastroepiploic arteries were used for coronary revascularization. A composite Y graft (right internal thoracic artery-radial artery) was used in 3 patients, and sequential bypass was performed in the other 3 patients. The total number of distal anastomoses was 2.7±1.0/patient. The angiographic patency of the distal anastmoses was 94.7% (18/19). One patient required intra-aortic balloon pumping postoperatively for perioperative myocardial infarction (Max CK-MB 200IU/<i>l</i>). All other patients had an uneventful postoperative course. In conclusion, although the internal thoracic artery is a protective vessel, there is a certain extent of atherosclerosis, which correlates with known risk factors. Our observations should not preclude use of the internal thoracic artery, but they should be considered for patients who are at risk for atherosclerotic changes of the internal thoracic artery. We considered that it is important to evaluate condition of <i>in situ</i> arterial grafts for patients with coronary artery disease preoperatively. Although further studies are required, <i>in situ</i> arterial grafting with sequential arterial conduit and composite arterial graft were associated with excellent results and achieved complete revascularization.

Tuberculous Thoracic Aneurysm Which Ruptured into the Lung / 日本心臓血管外科学会雑誌

We present a rare case of tuberculous thoracic aneurysm which ruptured into the lung. A 66-year-old woman who has been treated for lung tuberculosis and spondylocace was referred to our hospital for treatment of a descending thoracic aneurym confirmed by enhanced CT scan. On the 6th hospital day, she had massive hemoptysis and her systolic pressure dropped to 70mmHg. Emergency operation was performed under an F-F bypass. The saccular aneurysm was excised and surrounding infected tissue was debrided. UBE graft was inserted in situ and totally covered with omentum. The pathological diagnosis of the specimen was tuberculous aortic aneurysm. The postoperative course was uneventful. Good reconstruction and omental vessels around the replaced graft were revealed by postoperative angiogram. Two years later she is well. The omental covering of the replaced graft was a useful method for preventing graft infection.

Graft Replacement and Reconstruction of the Celiac, Superior Mesenteric and Both Renal Arteries in a Patient with Primary Dissection of Juxtarenal Abdominal Aorta / 日本心臓血管外科学会雑誌

Primary abdominal aortic dissection occurs infrequently. We experienced aortic dissection originating at the level of the right renal artery, for which graft replacement and reconstruction of the aorta and also the celiac, superior mesenteric and both renal arteries were performed. A 44-year-old woman with severe back pain was admitted to our hospital. CT and aortogram revealed primary abdominal aortic dissection. The abdominal aorta was replaced with a trunk prosthetic graft, to which were connected smaller grafts for the four abdominal visceral and also lumbar arteries. The intercostal artery was preserved by a diagonal trasection at the upper end of the graft site. To prevent ischemia of the visceral organs, we used a selective perfusion technique to the superior mesenteric artery and both renal arteries. The postoperative course was uneventful. The postoperative aortogram demonstrated good patency and function of the trunk graft and reconstructed visceral arteries

A Case of Ruptured Dissecting Aortic Aneurysm Involving a Right-sided Aortic Arch / 日本心臓血管外科学会雑誌

A case of ruptured dissecting aortic aneurysm (DeBakey IIIa) involving a right-sided aortic arch is reported. A 54-year-old man was admitted to our hospital with a complaint of severe back pain. Roentgenogram and enhanced computed tomography of the chest revealed a right-sided aortic arch, right descending thoracic aorta and right pleural effusion. Thoracocentesis of the right thoracic cavity revealed bloody fluid. The ruptured dissecting aortic aneurysm was suspected. The enhanced CT of the chest revealed leakage of the contrast medium at the level of the bifurcation of the trachea so aortography wasn't performed. There was a 2cm intimal tear in the descending aorta. Resection and grafting of the aneurysm via right thoracotomy was performed. The patient made an uneventful recovery and was discharged 4 weeks later. It is pointed out that the operative method and/or decision of the method of approach for the aneurysm involving a right arch are difficult because of the aberrant left subclavian artery and/or tortuous descending thoracic aorta. Impeccable judgement is needed for emergency operation of ruptured dissecting aneurysms like the present case.

Surgical Management of Patients with Coronary Artery Disease and Aortoiliac Occlusive Disease / 日本心臓血管外科学会雑誌

When coronary artery bypass grafting (CABG) is to be done, we use the internal thoracic artery (ITA) as a graft conduit in order to obtain longer patency. When the ITA acts as a good collateral to the lower extremities, blood flow to the extremities may decrease after CABG with ITA. Simultaneous open heart surgery and laparotomy may cause pulmonary complication. We made an algorithm of treatment for patients with coronary artery disease (CAD) and aortoiliac occlusive disease including these problems. From July 1991 to March 1992, 6 patients were operated and reviewed. Four patients were operated on for CAD and AIOD simultaneously. Two patients were operated on for CAD or AIOD at first and for the other secondarily. All 6 cases were discharged without any complications and are now free from angina and intermittent claudication. When the therapeutic plan for the patients with CAD and AIOD is made, it is very important that coronary revascularization is planned at first with careful evaluation of the blood flow to the lower extremities in cases with AIOD.