Arrhythmias during a Symptom-Limited Test other than sustained VT require?

• A. They can be ignored if asymptomatic.
• B. They require immediate defibrillation.
• C. They require strict bed rest.
• D. They require close observation as they may progress or affect hemodynamic stability.

Answer: (D)

During a symptom-limited exercise test, the heart is under stress and rhythm disturbances can reveal how well the electrical system and hemodynamics cope with increasing workload. Any arrhythmia that appears, even if it isn’t causing symptoms at the moment, can progress to more serious problems or disrupt cardiac output. That’s why the proper approach is close observation: continuously monitor the ECG, check blood pressure and symptoms, and be prepared to terminate the test and intervene if the rhythm worsens or the patient’s hemodynamics become unstable. Defibrillation is not routinely required for all non-sustained or non-life-threatening arrhythmias—it's reserved for situations where there is a dangerous rhythm with compromised circulation. Bed rest isn’t relevant during an exercise test, and ignoring an arrhythmia could miss a safety signal. The key idea is vigilant monitoring and rapid response if the rhythm progresses or stability is affected.