How Does the Modified Valsalva Maneuver Work
The Valsalva Maneuver Is a Noninvasive Way to Convert Patients from Svt to Sinus Rhythm. It Increases the Myocardial Refractory Period by Increasing...
The Valsalva maneuver is a noninvasive way to convert patients from SVT to sinus rhythm. It increases the myocardial refractory period by increasing intrathoracic pressure, thus stimulating baroreceptors in the aortic arch and carotid bodies, increasing vagal tone.
Why is modified Valsalva better?
The Valsava manoeuvre increases vagal tone, slows conduction through the atrioventricular (AV) node and prolongs the AV nodal refractory period, leading to a reduction in heart rate and reversion of supraventricular tachycardia.
Why does the Valsalva maneuver work?
Performing the Valsalva maneuver causes an increase in intrathoracic pressure, leading to a reduction in preload to the heart. Cardiovascular changes occur during and after this maneuver due to baroreflex and other compensatory reflex mechanisms that are initiated by decreased preload.
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