He'd seemed fine, but with his weak heart he wouldn't be able to fight off an infection this strong.

My grandfather had a weak heart, and he died in this way.

He had a weak heart, which caused him to die easily.

We already knew from his company's medical report he had a weak heart.

I had seen that look before in men with weak hearts.

Peter lived for some time after that, despite his weak heart.

Unless she had the same weak heart as her father.

That weak heart you have warned about is none too good.

Perhaps it was too much for a man with a weak heart.

This was all too much for him, I suppose, with his weak heart.