Cardiac infarction and Cardiac arrest

Cardiac arrest and cardiac infarction are semantically related In some cases you can replace phrase "Cardiac arrest" with "Cardiac infarction", this phrases are similar.

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.

Cardiac infarction and cardiac arrest are semantically related in heart attack topic. You can use "Cardiac infarction" instead a noun phrase "Cardiac arrest".