CLINICAL MEDICINE

Detailed explanation-1: -The sinus node continuously generates electrical impulses, thereby setting the normal rhythm and rate in a healthy heart. Hence, the SA node is referred to as the natural pacemaker of the heart.

Detailed explanation-2: -The heart’s natural pacemaker is a cluster of cells. Doctors refer to it as the sinoatrial (SA) node or sinus node. The SA node produces electrical impulses that set the heart rate and rhythm. The SA node is one of the most important tissues in the body as it initiates every heartbeat.

Detailed explanation-3: -Your heart’s sinus node is your natural pacemaker (found in the upper right chamber of the heart, known as the atrium). It sends an electrical impulse to make your heart beat. The job of a pacemaker is to artificially take over the role of your sinus node if it’s not working properly.

Detailed explanation-4: -The heart actually has two natural pacemakers. The sinoatrial node (SA node) is the primary pacemaker and the atrioventricular node (AV node) is the secondary. The AV node is in a bundle of tissues on the border that separates the right atrium and the right ventricle.

Detailed explanation-5: -Single chamber. One lead attaches to the upper or lower heart chamber. Dual-chamber. Uses two leads, one for the upper and one for the lower chamber. Biventricular pacemakers (used in cardiac resynchronization therapy).