EXPLAINER: What do we know about John Fetterman’s diagnosis?

HARRISBURG, Pa. — Pennsylvania’s lieutenant governor and a top Democratic candidate for U.S. Senate, John Fetterman, is recovering from a stroke he says was caused by a heart condition called atrial fibrillation.

In a statement Sunday, Fetterman says doctors quickly and completely removed the clot.

A cardiologist and chair of the Department of Preventive Medicine at Northwestern University, Dr. Donald Lloyd-Jones, says people who develop A-fib are almost always put on a blood-thinning medication for the rest of their lives.

He says that helps prevent the stroke-causing blood clots that untreated A-fib can create.