How do you approach the usage of hydroxychloroquine in patients with rheumatologic conditions and baseline cardiomyopathy or heart failure?

This is an excellent and difficult question that parallels the recent posted question about the use of hydroxychloroquine (HCQ) in someone with an abnormal visual field. There is no question that HCQ can cause cardiomyopathy. There is no question that HCQ can prolong the QT interval. Fortunately, ca...