The ATS bileaflet prosthetic heart valve: mid-term results from a single center

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  • 自治医科大学附属病院におけるATS 機械弁の中期成績

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Background Clinical results of ATS prosthetic heart valve use in Japan have not been fully investi-gated. We analyzed the mid-term results of its use in a single center. Methods Among 88 patients, mean age 61.1±9.9 years, 32 had aortic valve replacement（AVR）, 42 mitral valve replacement（MVR）, and 14 both aortic and mitral valve replacement（DVR）. Mean follow-up was 2.5±1.5 years with a cumulative follow-up of 224.2 patientyears. Results There were 3 early deaths（ 3.4%: all in the MVR group） and 7 late deaths（ 1.8±1.7 %/patient-year: 3 valve related and 4 valve unrelated）. Survival at 5 years was 96.8±17.8 % in the AVR group, 82.2±37.7 % in the MVR group, and 85.7±33.9 % in the DVR group. The linearized incidences of embolism （3）, bleeding events （2）, prosthetic valve endocarditis（3）, hemolysis（1） and re-operation（1） in all patients were 1.3±1.5 %, 1.9±1.9 %, 0.2±0.6 %, 2.1±1.8 % and 0.1±0.6 %/patient-year, respectively. No other complications were observed. Conclusion The ATS prosthetic heart valve showed excellent mid-term clinical results, with a low incidence of valve-related complications.

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