What is the most common cause of sudden cardiac arrest?

The statement that cardiac arrhythmia secondary to acute coronary syndrome is the most common cause of sudden cardiac arrest is accurate because a significant number of cases arise from electrical disturbances in the heart, often triggered by underlying coronary artery disease. This condition can lead to the development of life-threatening arrhythmias, such as ventricular fibrillation or pulseless ventricular tachycardia, which can abruptly stop effective heart function.

Acute myocardial infarction, while a common cause of cardiac issues, specifically leads to heart muscle damage and does not always result in sudden cardiac arrest without a concurrent arrhythmia. Severe hypoxia from airway obstruction is a critical situation that can lead to cardiac arrest, but this is less frequent than arrhythmias associated with coronary syndromes. Uncontrolled hypertension can lead to various cardiovascular problems over time, but it is not typically the immediate trigger for sudden cardiac arrest compared to the effects of a cardiac arrhythmia.