Cardiac arrest and Myocardial infarction

Cardiac arrest noun - Absence of systole; failure of the ventricles of the heart to contract (usually caused by ventricular fibrillation) with consequent absence of the heart beat leading to oxygen lack and eventually to death.

Myocardial infarction and cardiac arrest are semantically related in heart attack topic. In some cases you can use "Myocardial infarction" instead a noun phrase "Cardiac arrest".

Myocardial infarction noun - Destruction of heart tissue resulting from obstruction of the blood supply to the heart muscle.

Cardiac arrest and myocardial infarction are semantically related in heart failure topic. You can use "Cardiac arrest" instead a noun phrase "Myocardial infarction", if it concerns topics such as heart attack.