cardiologist
heart specialist
heart surgeon

Pump is the leader of the team and is the heart specialist.

It can be unsettling even to realize you need a heart specialist.

He was a heart specialist with too large a work load.

You may also be sent to a heart specialist, called a cardiologist, for more tests.

Coleman will be re-examined by heart specialists later this week.

And I have made an appointment with this heart specialist.

In turn, Redding did all it could to keep its heart specialists happy.

Many heart specialists have called for wider use of the drugs, particularly among individuals 65 and older.

And some heart specialists say they are now telling patients that they may want to consider taking other drugs for pain.

He's a doctor, one of the best heart specialists we have, and he happened to be treating another friend at the time he left.