A Case Report of Acute Thrombotic Obstruction of the On-X Mitral Valve Prosthesis / 日本心臓血管外科学会雑誌

A 39-year-old woman underwent aortic valve replacement (AVR) with a 21 mm St Jude Medical prosthesis and mitral valve replacement (MVR) with a 27/29 mm On-X valve prosthesis when she was 38-year-old, and she was discharged uneventfully. Five months after the operation, she was admitted with aggravated dyspnea. Upon admission she went into serious heart failure, followed by cardiogenic shock. Cineradiography showed a restricted opening of the On-X mitral valve prosthesis and transesophageal echocardiography demonstrated thrombus formation on the mitral valve annulus. We diagnosed thrombosed valve and reoperated urgently. Intraoperatively we found a large amount of fresh thrombus extending from the sewing cuff that restricted valve motion. The valve was cleaned and left in place. Although the heart recovered well, she lost some neurologic functions and was transferred to another hospital for rehabilitation. We also investigated the opening angle of the On-X mitral prosthesis in other patients who had clinically normal valve function.

Operation for Acute Aortic Dissection 13 Years after Operation for Funnel Chest in Marfan Syndrome / 日本心臓血管外科学会雑誌

Abnormalities of the skeleton and joint as well as ophthalmic symptoms and cardiovascular abnormalities are found in Marfan's syndrome, one of the connective tissue diseases associated with autosomal dominant inheritance. A 34-year-old man was operated on for Stanford type A acute aortic dissection that developed 13 years after sternal turnover surgery for funnel chest. After approaching by median incision made on the sternum, composite graft replacement and aortic arch replacement were performed. After surgery, the sternum at the site of reflections became unsteady, causing flail chest, which required internal fixation with an artificial respirator for 15 days. A patient with Marfan's syndrome may undergo cardiovascular operation twice or more throughout his lifetime. Where a longitudinal incision is made on the sternum after operation on the funnel chest, care should be exercised even if it is a long time after surgery. In this sense, minimal invasive surgery with a steel bar inserted percutaneously, a surgical technique that has come to be used recently, should be useful.

How Do Patients Think about Their Operation Scar after Cardiac Surgery? / 日本心臓血管外科学会雑誌

Because of the improved safety of cardiovascular surgical techniques, the small incision approach, called minimally invasive cardiac surgery (MICS), has recently been employed. In some cases of MICS, however, prolonged extracorporeal circulation time is required, and it is not minimally invasive in some aspects. It has been reported that the most prominent advantages of MICS is reducing the adverse consequences of conventional full-sternotomy, such as pain, bleeding and risk of mediastinitis, therefore it is helpful to reduce the period of hospitalization and costs. The small incision and cosmetic advantage is one of the objective advantages of MICS, so we interviewed 139 patients who underwent cardiac surgeries, to find out how they think of their operation scar. Most (61.9%) of the patients were not bothered by their scar, and the presence of keloid lesions mattered move than the size of their wound. What the patients considered to be most important were less pain after operation and shorter hospital stay, not to mention good results of the operation. The size and place of the wound ranked low in importance. It is important to be aware of the difference in thinking between the operative wound by patients and by the healthy medical staff. Furthermore it is important to recognize the difference between minimaly invasiveness and small incisions in cardiac surgery.

An Operation Case of Aortic Regurgitation and Pseudocoarctation of Aorta Associated with Takayasu's Aortitis / 日本心臓血管外科学会雑誌

A 53-year-old woman was admitted with cardiac failure due to aortic regurgitation (AR) and pseudocoarctation of the aorta associated with Takayasu's aortitis. It was revealed that her hypertension of upper extremities was based on Takayasu's aortitis at her 37-year-old age. But at that time there was no sign of inflammation, only drug therapy for hypertension had been employed. She started to complaint of dyspnea on exertion and palpitation when 47 years old, ultrasonic echocardiography and cardiac catheterization revealed that her symptoms were based on pseudocoarctation and AR. Despite of drug therapy, her symptoms progressed and reached NYHA class III. Detailed examination showed progressed AR and occurrence of mitral regurgitation (MR). Surgical treatment, ascending aorto-terminal aortic bypass, aortic valve replacement (AVR), and mitral valvuloplasty was performed at the age of 53 years old. In instituting the extracorporeal circulation, an arterial cannula was placed in the graft that anastomosed to the terminal aorta, in addition to the arterial cannula to the ascending aorta, to prevent low perfusion of the organs distal to the pseudocoarctation. The postoperative course was uneventful. Special attention should be paid to prevent low perfusion of the organs in such case with presence of pressure gradient in the aorta.

A Case of Acute Bowel Necrosis Caused by Ischemia of the Lower Half of the Body at 9 Years after Aortic Arch Replacement / 日本心臓血管外科学会雑誌

A 60-year-old man who had undergone aortic arch replacement 9 years prerviously was admitted complaining of motor and sensory disturbance of bilateral lower extremities. Bilateral femoral arteries were not palpable and he showed acute panperitonitis just after admission. Enhanced CT and arteriography revealed that the lower half of the body was severely ischemic due to the compression of the graft by a pseudoaneurysm of the proximal anastomotic portion of the aortic arch, and therefore performed an urgent operation. Recognizing acute bowel necrosis of the inferior mesenteric artery (IMA) area on laparotomy, Hartmann's operation was performed. After that, a right axillo-bifemoral bypass was also made in order to improve the perfusion of the lower half of the body. Though acute renal failure occurred because of DIC and myonephropathic metabolic syndrome (MNMS) postoperatively, the intensive therapy was eventually effective and he recovered.