APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Your sinoatrial node is sometimes called your heart’s natural pacemaker . It sends the electrical impulses that start the heartbeat. The SA node is in the upper part of your heart’s right atrium.

Detailed explanation-2: -An electrical stimulus is generated by the sinus node (also called the sinoatrial node, or SA node). This is a small mass of specialized tissue located in the right upper chamber (atria) of the heart. The sinus node generates an electrical stimulus regularly, 60 to 100 times per minute under normal conditions.

Detailed explanation-3: -The SA (sinoatrial) node generates an electrical signal that causes the upper heart chambers (atria) to contract. The signal then passes through the AV (atrioventricular) node to the lower heart chambers (ventricles), causing them to contract, or pump. The SA node is considered the pacemaker of the heart.

Detailed explanation-4: -At rest, the SA nodal myocytes depolarize at an intrinsic rate between 60 and 100 beats per minute, which is generally considered a normal heart rate.