Later in his career, he specialized in cardiology, a decision that those who know him assume was a result of his own life experience as a heart patient.

The doctor described her as his favorite heart patient and even checking her up at her own home.

The discovery could warn heart patients when they are in danger, the researchers believe.

It advises heart patients to seek a doctor's advice before taking over-thecounter remedies.

By the end of 1960 ten heart patients had received one.