She was born with a weak heart.

她生来就有一个衰弱的心脏。

《牛津词典》

She suffered from a weak heart.

她心脏不好。

《牛津词典》

Miss Holloway had a weak heart. She must have had a heart attack.

霍洛韦小姐心脏衰弱。她一定得过心脏病。

《柯林斯英汉双解大词典》

They may have a weak or damaged heart, high blood pressure or other problems of the blood system.

VOA: special.2010.07.27

He became weak,and his heart burst.

VOA: special.2009.02.21

Dr. Frank Stegall, a cardiologist at Redmond Regional Medical Center in Rome, told Gonzalez he had a chronically weak heart, or dilated cardiomyopathy.

CNN: Guatemalan in Atlanta awaits word on possible heart transplant

He had a weak heart but a sharp mind.

FORBES: Magazine Article

Zegerman thought that it was imperative to get Arty Groys home, to set him up, with his bad leg and weak heart, in bed or on his sofa, with pillows and remotes and restorative liquids, and to discuss his dietary preferences, so that she would know what to buy at the grocery store.

NEWYORKER: The Valetudinarian