Which of the following can be a cause of ventricular tachycardia?

Ventricular tachycardia (VT) can occur for various reasons, but electrolyte imbalances are a significant and well-established cause. The heart relies on a delicate balance of electrolytes—such as potassium, magnesium, and calcium—to maintain its electrical activity and rhythm. When these electrolytes are out of balance, it can lead to abnormal electrical signals and trigger arrhythmias like VT. For example, hypokalemia (low potassium) and hypomagnesemia (low magnesium) are two specific imbalances that can increase the risk of developing ventricular tachycardia.

While stress, dehydration, and high cholesterol can impact heart health and potentially contribute to various arrhythmias, they are less commonly directly associated with the specific mechanism that leads to VT. Stress and anxiety may exert indirect effects on heart rhythm by activating the sympathetic nervous system, but they do not directly cause VT in the way that electrolyte imbalances do. Dehydration can affect blood volume and heart function but is also not a primary causative factor for VT. High cholesterol levels may lead to cardiovascular disease over time but do not acutely influence the electrical instability of the heart associated with VT. Therefore, the role of electrolyte imbalances is clear and direct in the context of ventricular