In a patient with stable PSVT, what is the initial treatment step?

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Multiple Choice

In a patient with stable PSVT, what is the initial treatment step?

In stable PSVT, the first step is nonpharmacologic vagal maneuvers. These techniques, such as a Valsalva maneuver or carotid sinus massage when not contraindicated, work by increasing vagal tone and slowing conduction through the AV node. Since many PSVT episodes are AV nodal reentrant tachycardias, slowing AV nodal conduction can interrupt the reentrant circuit and restore a normal rhythm without medications. If vagal maneuvers fail to terminate the tachycardia, the next step is a rapid IV push of adenosine, which briefly blocks AV nodal conduction and can terminate the rhythm or reveal the underlying rhythm for easier diagnosis. Amiodarone or beta-blockers are not first-line for stable narrow-complex PSVT and are generally considered after pharmacologic AV nodal blockade with adenosine or in different clinical scenarios. Remember to use vagal maneuvers only in a stable patient and beware contraindications to carotid sinus massage.

In stable PSVT, the first step is nonpharmacologic vagal maneuvers. These techniques, such as a Valsalva maneuver or carotid sinus massage when not contraindicated, work by increasing vagal tone and slowing conduction through the AV node. Since many PSVT episodes are AV nodal reentrant tachycardias, slowing AV nodal conduction can interrupt the reentrant circuit and restore a normal rhythm without medications.

If vagal maneuvers fail to terminate the tachycardia, the next step is a rapid IV push of adenosine, which briefly blocks AV nodal conduction and can terminate the rhythm or reveal the underlying rhythm for easier diagnosis. Amiodarone or beta-blockers are not first-line for stable narrow-complex PSVT and are generally considered after pharmacologic AV nodal blockade with adenosine or in different clinical scenarios.

Remember to use vagal maneuvers only in a stable patient and beware contraindications to carotid sinus massage.

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