myocardial insufficiency

The official cause of death was "pneumonia with myocardial insufficiency".

The prison doctor said he had died during the night of "myocardial insufficiency with sudden heart failure."

Beau's syndrome: Defined as myocardial insufficiency and inability of the heart to perform a complete systole.

Kate died on November 2, 1940, just five days before her 90th birthday, of acute myocardial insufficiency, a condition she showed symptoms of for one day before her death.