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Biomedical subjects

Y Kotsuka

Publications and source records attributed to Y Kotsuka.

16 recordsLinked to original sources
PubMed1992

[Congenital bicuspid aortic valve: stenotic type and insufficient type].

Two-hundred and eighty-one patients underwent surgical treatment of the aortic valves during a 10-year period of 1981 to 1991, 32 of whom (11%) had bicuspid aortic valve. Bicuspid aortic valve is well known to cause calcified aortic stenosis, however, some of these cases develop pure aortic insufficiency of unknown etiology. In our studies of 32 patients with bicuspid aortic valve, 28 patients had aortic stenosis, 2 were aortic insufficiency and 2 were infective endocarditis. Pathogenesis of aortic insufficiency in patients with bicuspid aortic valves was discussed and compared with that of aortic stenosis.

Adult↗
PubMed1992

[Surgical treatment of acute aortic dissection in the aged: a case report].

A 77-year-old woman with Stanford type A acute aortic dissecting aneurysm was successfully treated by the sutureless technique using arringed intraluminal graft. A month after the operation, re-dissection to the distal abdominal aorta occurred. Because of the poor condition of the patient and her great age, we chose an antihypertensive therapy instead of a reoperation. Two years after the operation this patient leads a sound life without any symptoms. In a case of acute aortic dissection of the aged, special consideration may be allowed to a surgical method and a decision-making for a reoperation.

Acute Disease↗
PubMed1991

[Current problems in valvular surgery].

Based upon our experiences of 661 valvular operations for these 10 years, we discussed about three major topics in valvular surgery. The first is the current status of valve repair versus replacement. The second is on the changing aspects of patients undergoing valvular surgery. Finally difficult problems in the treatment of infective endocarditis was discussed.

Aged↗
PubMed1989

Technical modification of aortic valve replacement in aortitis syndrome--report of a case.

In patients who have aortitis syndrome associated with aortic regurgitation, aortic valve replacement (AVR) is frequently complicated by perivalvular leakage (PVL). A 47-year-old male with aortitis syndrome and severe aortic regurgitation was treated by AVR, modified in such a way as to prevent PVL. The aortic cusps were not resected and were placed between Teflon pledgets and the aortic annulus. We believe that this technique is useful for preventing PVL in patients with aortitis syndrome in which the aortic annulus is severely inflammed.

Aortic Arch Syndromes↗
PubMed1989

[Surgical treatment of Stanford type A acute aortic dissection with stenosis of the branches of aortic arch: report of two cases].

Recently two cases of Stanford type A acute aortic dissection with stenosis of the branches of aortic arch were operated. Both of them had the intimal tear in the ascending aorta, and the stenosis caused by the dissection was present in the left subclavian artery in the first case and in the brachiocephalic and the right common carotid arteries in the second case. Repairs of the dissected ascending aorta were performed successfully with the interposition of the ringed intraluminal graft in the first case, and with the composite graft replacement of the ascending aorta and the aortic valve in the second case. Complete remission or significant relief of the branch stenoses which had not been given direct surgical repairs was observed by the postoperative angiograms.

Acute Disease↗
PubMed1986

Conduction disturbance and tachyarrhythmia in postoperative ventricular septal defect and tetralogy of Fallot.

The importance of conduction disturbances and tachyarrhythmias as the determining factors of the late results of postoperative patients with ventricular septal defect and tetralogy of Fallot was reconfirmed in this follow-up study. It was found, however, that the incidences of complete heart block, bilateral bundle-branch block, and ventricular tachyarrhythmia have decreased significantly since the establishment of cold cardioplegia. This has certainly contributed to the remarkable improvement in late follow-up results of postoperative patients with ventricular septal defect or tetralogy of Fallot.

Arrhythmias, Cardiac↗
PubMedDate not supplied

Coronary artery bypass grafting in a patient with cryoglobulinemia.

Coronary artery bypass grafting (CABG) was performed in a patient with cryoglobulinemia. In order to decrease the concentration of cryoglobulin, the patient underwent double filtration plasmapheresis (DFPP) pre- and postoperatively as well as during cardiopulmonary bypass. Bypass surgery was performed under total cardiopulmonary bypass, moderate systemic hypothermia, and ventricular fibrillation without aortic crossclamping. No adverse effects of cryoglobulin appeared during the peri- and postoperative course. Technical considerations for open heart surgery in patients with cryoglobulinemia are described.

Body Temperature↗