Which heart condition is associated with a significant risk of sudden cardiac arrest?

Ventricular tachycardia (VT) is a condition characterized by a rapid heartbeat originating from the ventricles of the heart. This arrhythmia can be particularly dangerous because it may lead to insufficient blood flow to the body and can degenerate into ventricular fibrillation, which is a condition that can result in sudden cardiac arrest. In VT, the heart is unable to pump efficiently due to the abnormally fast heart rate, potentially causing symptoms such as lightheadedness, palpitations, or even loss of consciousness.

The significant risk of sudden cardiac arrest is due to the fact that if the ventricles are not able to fill and empty properly, it can result in a rapid decline in effective circulation, leading to an immediate threat to life. The likelihood of progressing to more severe states, including ventricular fibrillation, makes this condition particularly critical in emergency situations.

While atrial fibrillation can also cause complications, it is less likely to directly lead to sudden cardiac arrest compared to ventricular tachycardia. Bradycardia, characterized by a slow heart rate, can result in symptoms but is usually less acutely dangerous than VT unless it becomes extreme. Heart murmurs are typically benign sounds that indicate turbulent blood flow and, while they may be associated