What is the primary cause of cardiac arrest in adults?

The primary cause of cardiac arrest in adults is coronary artery disease. This condition involves the narrowing or blockage of coronary arteries that supply blood to the heart muscle. Over time, atherosclerosis can lead to the buildup of plaques, which may rupture and form a blood clot, obstructing blood flow. When the heart does not receive sufficient oxygenated blood, it can lead to arrhythmias and ultimately result in a cardiac arrest.

Coronary artery disease is prevalent in adults due to risk factors such as high blood pressure, high cholesterol, smoking, obesity, and a sedentary lifestyle. Understanding this connection highlights the importance of preventive measures and management of cardiovascular health to reduce the incidence of cardiac arrest.

In contrast, while trauma, respiratory failure, and stroke can lead to cardiac arrest, they are not as prevalent or common as coronary artery disease in the adult population. Thus, the significant role of coronary artery disease in cardiac events makes it the primary cause of cardiac arrest among adults.