What is the primary cause of cardiac arrest in adults?

The primary cause of cardiac arrest in adults is coronary artery disease. This condition leads to the narrowing or blockage of the coronary arteries which supply blood to the heart muscle. When these arteries are compromised, the heart can become deprived of oxygen, leading to massive damage to the heart tissue. This damage increases the risk of life-threatening arrhythmias, which can ultimately result in cardiac arrest.

While conditions such as pulmonary embolism and congestive heart failure can also lead to cardiac emergencies, they are not as prevalent as coronary artery disease when it comes to triggering cardiac arrests specifically. Arrhythmias can be a direct consequence of underlying heart conditions like coronary artery disease, and while they often lead to cardiac arrest, they typically stem from this primary condition rather than being an independent cause. Understanding the role that coronary artery disease plays highlights the importance of preventive measures, such as maintaining cardiovascular health, to reduce the risk of cardiac arrest.