Two Cases of Extended Sandwich Patch Technique through Right Ventriculotomy for Ventricular Septal Perforation : Considerations in Postoperative Left Ventricular Remodeling / 日本心臓血管外科学会雑誌

<p>We report two cases of extended sandwich patch technique through right ventriculotomy for ventricular septal perforation (VSP). One was an 82-year-old woman. Preoperative coronary angiography showed occlusion of the left anterior descending artery proximal to the first major septal branch. Operative inspection revealed relatively extensive infarction of the anterior wall, a part of which had the appearance of free wall rupture. In the other case of an 85-year-old woman, the culprit lesion was occlusion of the left anterior descending artery distal to several septal branches and to the first diagonal branch. Despite their old age and emergency surgery in cardiogenic shock status, their postoperative recovery was uneventful. In the former case, however, echocardiography at the early postoperative phase revealed significant expansion and thinning of the infarcted anterior wall. Furthermore, serial observations showed deterioration of the left ventricular systolic function and mitral regurgitation due to leaflet tethering. In addition to secure VSP closure by transmural stitches, extended sandwich patch technique can offer geometric and functional preservation of postinfarction left ventricle. Although this can eliminate the risk of postoperative low output syndrome even if anterior infarction is extensive, late follow-up will be required because this technique can also allow postinfarction left ventricular remodeling.</p>

Development of Mycotic Aneurysm of the Internal Iliac Artery Following Embolectomy of the Common Iliac Artery : Report of a Case Complicating Infective Endocarditis / 日本心臓血管外科学会雑誌

<p>A 23-year-old woman with mitral valve infective endocarditis complicated by embolism of the right common iliac artery underwent transfemoral embolectomy by a Fogarty catheter and mitral valve replacement. She developed occlusion of the right internal iliac artery, that was revealed by computed tomography on the 9th postoperative day. The occlusion was considered to result from migration of a part of the emboli from the right common iliac artery into the right internal iliac artery during the procedure of embolectomy. On the 16th postoperative day, she underwent repeat mitral valve replacement because of perivalvular leakage. Furthermore, after 2 weeks from the diagnosis of embolism of the right internal iliac artery, the embolic site showed aneurysmal formation finally requiring aneurysmectomy. Her recovery was uneventful. Our case is considered to be rare in that serial observations on computed tomography indicated the development of mycotic aneurysm at the site of septic embolism. In addition, care must be taken to prevent migration of emboli into branched arteries during the procedure of embolectomy for peripheral arterial septic embolism caused by infective endocarditis.</p>

Surgical Results of Valvular Disease in Hemodialysis Patients / 日本心臓血管外科学会雑誌

<b>Background</b> : The Japanese Society for Dialysis Therapy in 2011 reports that the number of hemodialysis patients has been increasing and that there is an increase in long-term hemodialysis patients and the aging of hemodialysis induction. Therefore, it can be expected that the number of valve surgeries in chronic hemodialysis patients will increase. However, there are many problems between chronic hemodialysis and valve surgery. <b>Objectives</b> : To describe the results of valve surgery in chronic hemodialysis patients at our institution and evaluate the selection of prosthetic valve and associated problems. <b>Methods</b> : Between January 2001 and June 2011, a total of 29 patients on chronic hemodialysis including 3 patients for re-operation, underwent valve replacements. The average age was 67.3±9.3 years and 17 (65%) were men. The average dialysis duration was 7.9±6.4 years. The etiologies of renal failure were 8 for chronic glomerulonephritis (31%), 8 for nephrosclerosis (31%) and 3 for diabetic nephropathy (12%). <b>Results</b> : There were 2 (7.7%) in-hospital deaths, which resulted from ischemia of intestine and multiple organ failure due to heart failure. Twelve (46%) patients died during the follow-up period and the 5-year survival rate after surgery was as poor as another authors have reported previously (30.6%). However, the 5-year survival rate after hemodialysis introduction was 87.1%, which was better than the report of the Japanese Society for Dialysis Therapy in 2011 (60%). Average age was significantly higher in bioprosthetic valves than in mechanical valves (<i>p</i>=0.02). There was no significant difference in survival rate among mechanical and bioprosthetic valves (<i>p</i>=0.75). There was no significant difference in valve-related complication free rate among mechanical (27.5%) and bioprosthetic valves (23.4%) (<i>p</i>=0.9). Three patients with mechanical valves had cerebral hemorrhage, and 1 patient with bioprosthetic valve had structural valve deterioration. <b>Conclusions</b> : Surgical result of valvular disease in hemodialysis patients was as poor as another authors reported previously (5-year survival rate : 30.6%), but survival rate after hemodialysis introduction was not very poor (87.1%). There was no significant difference in survival rate among mechanical and bioprosthetic valves. Bioprosthetic valve has the risk of reoperation due to early structural valve deterioration, but there was no significant difference in valve-related complication free rates. Therefore, we should select prosthetic valve in consideration of individual cases.

Aortic Valve-Sparing Operation in a 8 Years Old Boy with Loeys-Dietz Syndrome with Annuloaortic Ectasia / 日本心臓血管外科学会雑誌

An 8 year-old boy had a cardiac murmur pointed out on day three after birth and was given a diagnosis of ventricular septal defect (VSD). He underwent VSD patch closure at two months after birth. He was also found the having Loeys-Dietz syndrome on the basis of mutation of <i>TGFBR2 </i>and physical examination at the age of 2 years. He had been followed up at pediatrics clinic of our hospital since then, and was hospitalized for a 46.5-mm extension of valsalva sinus diameter and moderate aortic insufficiency. The aortic valve was three-cusped and had no abnormality. We performed valve-sparing aortic root replacement. He was discharged on day 18 after the operation without any problems in the postoperative course. Use of an artificial heart valve for the surgery of the aortic root lesion in childhood will probably cause reoperation in the future and difficulty in Warfarin anticoagulation control. A careful decision is needed in the choice of an operation method. Valve-sparing aortic root replacement is a useful operation for patients without aortic valve abnormality.

Reconstruction of the Left Ventricular Outflow Tract with a Rolled Equine Pericardium for Annular Abscess after Aortic Root Replacement / 日本心臓血管外科学会雑誌

A 61 year-old man was admitted with fever and chest discomfort. He had undergone aortic root replacement for annuloaortic ectasia at age 57. Computed tomography showed a pseudoaneurysm and an abscess formation around the aortic root. Prosthetic valve endocarditis was diagnosed and the underwent repeat aortic root replacement. After debridement and irrigation of the abscess cavity, the left ventricular outflow tract was reconstructed with an equine pericardium, which was rolled to form a conduit. The pericardial conduit was securely sutured to the healthy left ventricular wall and the mitral annulus. A 25 mm-Freestyle valve was then sutured to the distal end of the conduit. The previous prosthetic vascular graft was removed and Completely replaced with a new prosthesis. This method provided secure fixation of a new prosthetic valved conduit to the normal left ventricular tissue with an excellent operative visual field.

Familial Aortic Dissection: A Report of Four Cases in Two Families / 日本心臓血管外科学会雑誌

There are rare reports of families with multiple members with aortic dissection in the absence of Marfan syndrome. We encountered four cases of aortic dissection in two families. The aortic dissection occurred in the mother and child of the first family and in sisters of the second family. All cases had systemic hypertension preoperatively and presented Stanford type A aortic dissection. All of them were operated successfully. None of them showed the characteristics of connective tissue disease affecting the skeletal, ocular, and cardiovascular system. However, many members of the two families had systemic hypertension and histopathological examination of the aorta showed cystic medial necrosis in all of the four cases. The present study suggests that the familial aortic dissection may be caused by weakness of the aortic wall related to heredity and systemic hypertension.

A Case of Unruptured Aneurysm of the Sinus of Valsalva / 日本心臓血管外科学会雑誌

A 36-year-old woman was admitted because of dyspnea on exertion and palpitations, during follow-up for ventricular septal defect since age 5. Physical examination revealed a grade IV/VI ejection systolic murmur at the second left intercostal space. Echocardiogram failed to recognize an unruptured aneurysm of the sinus of Valsalva protruding into the right ventricle which was seen on right ventriculogram (type I of Konno). Surgical treatment was successfully performed. Right ventriculography was much more effective rather than echocardiography in this case.

A Case of Ischemic Limb Perfusion during Cardiopulmonary Bypass / 日本心臓血管外科学会雑誌

A 64-year-old woman with chest pain and intermittent claudication was admitted to our hospital. Unstable angina pectoris and arteriosclerosis obliterans (ASO) of both leg were diagnosed. Angiography indicated total occlusion of the right external iliac artery and severe stenosis of the left external iliac artery, in addition to significant stenoses of the three major coronary arteries. The ankle pressure index was 0.49 in her right leg, and 0.74 in the left. Because coronary stenting was unsuccessful, emergency coronary artery bypass grafting was performed prior to arterial reconstruction of the lower extremities. To prevent exacerbation of limb ischemia during cardiopulmonary bypass (CPB), selective limb perfusion was performed with a 14-gauge intravenous catheter inserted into the right superficial femoral artery. There were no complications related to limb ischemia during or after the operation. Selective limb perfusion was considered to be useful to prevent limb ischemia during CPB in patients with ASO of the legs.