MICROANATOMY

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: -It’s a long nerve that runs from the brain down through the chest and into the abdomen. The vagus nerve has several functions, including slowing the heart rate.

Detailed explanation-3: -If, for instance, the heart produces a larger stroke volume (the second beat in the schema) this is sensed by the baroreceptors and transformed via the vagus nerve into more slowing down. Consequently, the next diastolic pressure is already more or less stabilized, depending on the effectiveness of the baroreflex.

Detailed explanation-4: -Vagal nerve stimulation increases right ventricular contraction and relaxation and heart rate.

Detailed explanation-5: -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.