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

The most common cause of cardiac arrest in adults is coronary artery disease. This condition primarily arises from atherosclerosis, where the coronary arteries become narrowed and restricted due to the buildup of plaque. As a result, the heart may not receive adequate blood supply, leading to ischemia. If the ischemic condition is severe and prolonged, it can culminate in a heart attack, which may then progress to cardiac arrest if the heart ceases to function effectively.

Understanding the prevalence of coronary artery disease is crucial for EMTs because it informs their approach to patient care. Many adults presenting with cardiac arrest have underlying heart disease, emphasizing the need for quick recognition, assessment, and appropriate interventions like CPR and defibrillation. Recognizing this common cause helps EMTs prioritize their training and readiness to manage such emergencies effectively.