question: I had an EKG today. Background- I have an enlarged heart from Rheumatic fever when I was a kid. I normally have abnormal EKGs. Today I had one that showed I may have a blocked artery. But the doc says EKGs are sometimes in error. I am to have a stress test and echo asap he says. Im scheduled for Monday... how worried should I be? How often are these EKG readings false?