What is the most common cause of cardiac arrest in adults?

Coronary artery disease (CAD) is the most common cause of cardiac arrest in adults due to its direct link to the heart's blood supply and electrical conduction system. CAD typically results from the buildup of plaque in the coronary arteries, which can restrict blood flow to the heart muscle. This reduced blood supply can lead to ischemia, arrhythmias, or myocardial infarction, all of which can precipitate cardiac arrest.

In adults, the majority of cardiac arrests are related to the underlying heart problems associated with coronary artery disease, making it a primary concern for medical professionals. When the heart is deprived of oxygen and nutrients due to narrowed or blocked arteries, it can enter a life-threatening rhythm disturbance, significantly increasing the risk of sudden cardiac arrest. Addressing coronary artery disease through lifestyle changes, medication, or surgical interventions can help reduce the incidence of these potentially fatal events.