What is the management for stable SVT with SBP greater than 90 mmHg?

In the context of managing stable Supraventricular Tachycardia (SVT) with a systolic blood pressure (SBP) greater than 90 mmHg, the modified Valsalva maneuver is a first-line intervention because it is a non-invasive technique aimed at restoring normal sinus rhythm. This maneuver involves the patient performing a controlled breath-holding technique, which can increase intrathoracic pressure and help in stimulating the vagus nerve. This vagal stimulation can slow down or potentially interrupt the rapid heart rate caused by SVT.

This approach is particularly suitable for patients who are stable, as it avoids the need for medications or invasive procedures while potentially restoring normal heart rhythm. It is important to note that while adenosine can be effective for SVT, it is typically administered if the initial vagal maneuvers are unsuccessful. In cases of unstable patients, immediate defibrillation or synchronized cardioversion would be appropriate, but these are not indicated in stable patients.