Cardiac arrhythmias are disturbances in cardiac rhythm that often arise as a lethal complication of heart failure.

Early medical treatment and early access to antivenom can prevent and drastically reduce the chance of developing the severe/potentially lethal complications.

Disease on the Rise Before drugs became available to control AIDS, mycobacterial infections were common and sometimes lethal complications of it.

A pseudoaneurysm of the left ventricle is a potentially lethal complication from a myocardial infarction.

Ventricular tachycardia is a common, and often lethal, complication of a myocardial infarction (heart attack).

This winds up having terrible consequences when a nosy farmer gets in the way, and it's only the beginning of the story's lethal complications.

Also mentioned as a "possible lethal complication of leucotomy" were three murders committed by people who had undergone leucotomy.

Hypoglycaemia and infection are important and potentially lethal complications which should always be considered.

Neuroleptic malignant syndrome is a potentially lethal complication of first or second generation antipsychotics.

"That could lead to lethal complications."