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Posts Tagged ‘Branch block’

The heart has a “pacemaker” called natural senatorial node (SA). The SA node is a group of specialized cells located at the top of the right upper heart chamber (right atrium). The SA node sends electrical impulses through the heart, between 60 and 100 times per minute, to beat (contraction).

When the SA node sends an electrical impulse, it first passes through the heart’s upper chambers (the atria), and then passes through a small group of cells called the atrioventricular (AV). The AV node checks the impulse and sends it to a conduction pathway called the bundle. The bundle of His divides into a right branch and left branch leading to the heart’s lower chambers (ventricles). Read the rest of this entry »