MUSCLE PHYSIOLOGY

Detailed explanation-1: -The middle (or Wenckebach’s pathway) extends from the superior part of the sinoatrial node, runs posteriorly to the superior vena cava, then descends within the atrial septum, and may join the anterior bundle as it enters the atrioventricular node.

Detailed explanation-2: -Bachmann’s bundle (BB), also known as the interatrial bundle, is well recognized as a muscular bundle comprising of parallel aligned myocardial strands connecting the right and left atrial walls and is considered to be the main pathway of interatrial conduction.

Detailed explanation-3: -The bundle of His is an elongated segment connecting the AV Node and the left and right bundle branches of the septal crest. It is approximately 1.8 cm long in an adult heart[4] and is primarily located deep within the dense connective tissue.

Detailed explanation-4: -Purkinje fibers They send electrical signals very quickly to your right and left heart ventricles. Your Purkinje fibers are in the subendocardial surface of your ventricle walls.