What is a life-threatening consequence of ventricular tachycardia?

• A. Paroxysmal nocturnal dyspnea
• B. Sudden cardiac arrest
• C. Nausea and vomiting
• D. Stable angina

Answer: (B)

Ventricular tachycardia (VT) is a potentially life-threatening arrhythmia characterized by a fast heart rate originating from the ventricles. One of the most significant dangers of VT is that it can lead to sudden cardiac arrest. This occurs because the heart may not be able to pump blood effectively during such rapid electrical activity, which can disrupt its ability to maintain adequate blood flow to vital organs. Without prompt treatment, patients can deteriorate quickly, and immediate medical intervention is often required to restore a normal heartbeat and prevent fatal outcomes.

The other potential consequences listed, such as paroxysmal nocturnal dyspnea, nausea and vomiting, and stable angina, are not typically classified as direct life-threatening outcomes of ventricular tachycardia. While these symptoms may relate to underlying heart conditions or heart failure, they do not capture the acute risk posed by VT itself, which is the critical concern when dealing with this condition. Hence, sudden cardiac arrest is the most accurate and relevant consequence associated with ventricular tachycardia.