“I am sure doctors are aware if a patient has a pre-existing heart condition”
It has nothing to do with preexisting heart conditions. HCQ is well known to extend the QTC (part of the heart rhythm, if it becomes to long the heart can descend into a potential fatal rhythm called torsades)
Certainly if a patient already has a long QTC they are at risk , this can be ascertained by a simple EKG.
The bigger concern is then if more QTC prolonging mediations are added, like if the patient takes a z pack for say penumonia.
“if the life would hang in the balance with the threat of coronavirus. The risks have to be weighed”
no question.
I literally said this in my very first post way back on April 6. Go check its still there