What does sustained ventricular tachycardia during a Symptom-Limited Test interfere with?

What does sustained ventricular tachycardia during a Symptom-Limited Test interfere with?

• A. It indicates good hemodynamic stability.
• B. It reduces risk of death.
• C. It interferes with cardiac output, increasing the risk of sudden cardiac arrest.
• D. It has no effect on prognosis.

Answer: (C)

Sustained ventricular tachycardia during a symptom-limited exercise test disrupts the heart’s ability to pump effectively. The rapid, abnormal rhythm shortens diastolic filling time and lowers stroke volume, so cardiac output drops. That reduces perfusion to vital organs, including the brain and heart, and can lead to hypotension, syncope, or progression to more dangerous arrhythmias. Because of this unstable hemodynamics, sustained VT markedly increases the risk of sudden cardiac arrest and worsens prognosis. The idea that it indicates good stability or that it reduces death risk isn’t correct, and it does have prognostic implications.

Sustained ventricular tachycardia during a symptom-limited exercise test disrupts the heart’s ability to pump effectively. The rapid, abnormal rhythm shortens diastolic filling time and lowers stroke volume, so cardiac output drops. That reduces perfusion to vital organs, including the brain and heart, and can lead to hypotension, syncope, or progression to more dangerous arrhythmias. Because of this unstable hemodynamics, sustained VT markedly increases the risk of sudden cardiac arrest and worsens prognosis. The idea that it indicates good stability or that it reduces death risk isn’t correct, and it does have prognostic implications.