And we also know that we should avoid reducing preload in these patients because reducing preload may cause obstruction of left ventricular outflow tract which is not convenient, so we try to avoid diuretics and nitrates in this kind of patients, but we u
And we also know that we should avoid reducing preload in these patients because reducing preload may cause obstruction of left ventricular outflow tract which is not convenient, so we try to avoid diuretics and nitrates in this kind of patients, but we u
我们也知道我们应该避免减低这些患者的前负荷，因为减低前负荷会使本来就很艰难的左心室流出道更加容易阻塞，所以我们都会尽量避免给这类患者使用利尿剂和硝酸酯类药物，但我们经常会用到钙离子拮抗剂和?