About cardiac issues. Probably about 98% of those reported are traceable to Genetic patterns, at least in part. I happen to have about 10 active genes which touch on the heart. So that is the first thing one should arrange at the first real sign of cardiac problems. Most of the good sequencers are now charging less than $400 for a good screening of the whole genome. And it is very simple. Also, various scans are very helpful, especially echocardiography, which is the easiest ant perhaps the best for many cardiac issues. And finally, a very good test is simple. "How do you feel?" Pain in the middle of your chest? does the top of your head get cold? Do you feel your heart pounding or fluttering or stuttering? How does your O2 level read at various places around your body--toes, fingers, ears, nose, tongue. Finally, af the local doc says you don't have any problems, you probably have a pile of them. And almost every person has some heart problem. Cardiomegaly, etc.