Kazuo Yamanaka

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OBJECTIVES We evaluated the durability of aortic valve preservation with root reconstruction for acute type A aortic dissection (AAAD). METHODS From January 2002 to March 2011, 140 patients [70 males, 68 ± 12 (SD) years] underwent emergency operation for AAAD. The aortic valve was preserved and one or more Valsalva sinuses were reconstructed. Techniques(More)
BACKGROUND Although the MAZE procedure allows for the recovery of sinus rhythm and left atrial (LA) mechanical function in the great majority of patients with chronic atrial fibrillation (AF), the effects of MAZE on the precise LA geometry and wall motion remain to be elucidated. We hypothesized that LA size and mechanical function in patients with chronic(More)
PURPOSE The short-term outcome of physiologic repair for congenitally corrected transposition of the great arteries (ccTGA) is generally considered favorable; however, the long-term outcome is the greatest problem, especially with regard to right ventricular (RV) function and tricuspid regurgitation (TR). Although tricuspid valve replacement (TVR) appears(More)
Results Patient characteristics such as preoperative complications and shock status were almost similar between the groups. Although intraoperative parameters such as total cardiopulmonary bypass time, hypothermic circulatory arrest time, minimum bladder temperature and percentage of total arch replacement were also similar between the groups, ascending(More)
BACKGROUND Severe tricuspid regurgitation (TR) sometimes develops late after left-sided valve surgery without left heart failure, pulmonary hypertension or rheumatic tricuspid valve. The purpose of the present study was to investigate clinical characteristics and mechanisms of severe isolated TR late after left-sided valve surgery. METHODS AND RESULTS A(More)
BACKGROUND  According to the Japanese Circulation Society guidelines, a bioprosthesis is recommended for aortic valve replacement (AVR) in patients aged ≥65 years who have no risk factors for thromboembolism. There are few data, however, regarding the actual durability of bioprosthetic valves in Japanese patients. The purpose of this study was to assess the(More)
This case report describes the repair of an aortoesophageal fistula caused by a previously placed aortic arch graft. A 62-year-old man underwent total aortic arch graft replacement one year ago. He was readmitted with hematemesis and a high fever. Examination by endoscopy revealed a perforation and two swollen lesions in the mid-esophagus. With the(More)
BACKGROUND AND AIM OF THE STUDY Prosthetic valve endocarditis (PVE) is considered a time-related event. The study aim was to compare the clinical characteristics and outcomes of early- and late-onset PVE, and to investigate potential preventive measures for each condition. METHODS A total of 47 consecutive patients undergoing surgery for PVE between(More)