What is the initial treatment for an acute episode of supraventricular tachycardia in a hemodynamically stable patient?

What is the initial treatment for an acute episode of supraventricular tachycardia in a hemodynamically stable patient?

• A. Caffeine
• B. Beta Blockers
• C. Valsalva Maneuver
• D. Synchronized Cardioversion

Answer: (C)

The main idea is that when someone with acute SVT is hemodynamically stable, the first move is a vagal maneuver. Valsalva works by changing autonomic tone, which increases conduction time through the AV node and can interrupt the reentrant circuit that often causes SVT. If the AV nodal pathway is reset, the heart can revert to a normal rhythm without drugs or shocks. That’s why this noninvasive, immediate maneuver is chosen before medications or electrical treatment. If the vagal maneuver succeeds, no further intervention is needed right away. If it doesn’t work, the next step is typically a medication like adenosine, given intravenously, to transiently block AV nodal conduction and terminate the tachycardia. In unstable patients, or if the patient deteriorates, synchronized cardioversion becomes necessary. Caffeine would generally worsen tachycardia, and synchronized cardioversion is reserved for instability rather than as the initial move in a stable patient.

The main idea is that when someone with acute SVT is hemodynamically stable, the first move is a vagal maneuver. Valsalva works by changing autonomic tone, which increases conduction time through the AV node and can interrupt the reentrant circuit that often causes SVT. If the AV nodal pathway is reset, the heart can revert to a normal rhythm without drugs or shocks. That’s why this noninvasive, immediate maneuver is chosen before medications or electrical treatment.

If the vagal maneuver succeeds, no further intervention is needed right away. If it doesn’t work, the next step is typically a medication like adenosine, given intravenously, to transiently block AV nodal conduction and terminate the tachycardia. In unstable patients, or if the patient deteriorates, synchronized cardioversion becomes necessary. Caffeine would generally worsen tachycardia, and synchronized cardioversion is reserved for instability rather than as the initial move in a stable patient.