What distinguishes SVT from VT?

The distinction between supraventricular tachycardia (SVT) and ventricular tachycardia (VT) is fundamentally based on their anatomical origins within the heart. SVT originates from the atria, which are the upper chambers of the heart, resulting in rapid heart rates that typically range from 150 to 250 beats per minute. This can occur due to re-entry circuits or abnormal impulses from the atria.

On the other hand, VT arises from the ventricles, the heart's lower chambers, and usually indicates a more severe underlying cardiac issue. VT can lead to less effective pumping of blood, potentially resulting in hemodynamic instability or progression to more serious rhythms like ventricular fibrillation.

Understanding this distinction between the atrial source of SVT and the ventricular source of VT is crucial in managing these conditions effectively. Appropriate treatment strategies differ greatly depending on whether the tachycardia originates in the atria or the ventricles. This knowledge is vital when assessing a patient, determining the urgency of intervention, and selecting the best therapeutic approach.