Recent studies offer a reminder that a big risk factor for Pennsylvania Democratic Senate candidate John Fetterman’s health issues is something over which he has no control: his height. Cardiologists have known for years that taller people — such as the 6-foot-8 Fetterman, who is taller than all but a tiny fraction of adult men — are at higher risk for an irregular heart rhythm called atrial fibrillation (A-fib). That heart condition in turn raises a person’s risk of a stroke, like the one Fetterman suffered May 13. Fetterman has said he has lingering speech and communication issues, and his h...