PATHOLOGY

Detailed explanation-1: -Vagal maneuvers can slow down a supraventricular tachycardia (SVT) (fast heart rate) 20% to 40% of the time. However, if you have a fast heart rate again and again, your healthcare provider may prescribe medication for you and/or recommend other treatment, such as catheter ablation.

Detailed explanation-2: -The higher the vagus nerve activity is, the slower the heart rate is, the greater the increase in the parasympathetic component of heart rate variability is, and the better the outcome is.

Detailed explanation-3: -The left vagus nerve mostly innervates atrioventricular (AV) node, which slows conduction between the atria and the ventricles. The end product of vagal stimulation is a decrease in the speed and frequency of electrical impulses in the heart, which could ultimately slow or terminate a tachydysrhythmia.