主要结果：采用堪萨斯城心肌病调查表的大体概要指标和主要的次级指标基线，第一年每三个月测量一次，以后到第四年每年测定一次。
Main Outcome Measures Kansas City Cardiomyopathy Questionnaire (KCCQ) overall summary scale and key subscales at baseline, every 3 months for 12 months, and annually thereafter for up to 4 years.
主要结果：采用堪萨斯城心肌病调查表的大体概要指标和主要的次级指标基线，第一年每三个月测量一次，以后到第四年每年测定一次。
Main Outcome Measures Kansas City Cardiomyopathy Questionnaire (KCCQ) overall summary scale and key subscales at baseline, every 3 months for 12 months, and annually thereafter for up to 4 years.
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