Yes, ventricular contraction occurs shortly after depolarization of the Purkinje fibers. When the Purkinje fibers depolarize, they rapidly conduct electrical impulses throughout the ventricles, leading to synchronized contraction of the ventricular muscle. This contraction, known as ventricular systole, follows the wave of depolarization and is essential for effectively pumping blood out of the heart.
purkinje fibers
The network found in the ventricular myocardium is known as the Purkinje fibers. These specialized cardiac muscle fibers are part of the heart's conduction system and are responsible for rapidly transmitting electrical impulses throughout the ventricles. This helps coordinate the contraction of the ventricles, ensuring efficient pumping of blood. The Purkinje fibers facilitate a synchronized contraction, allowing for effective ventricular function.
Ventricular contractions start in the Purkinje fibers, which are specialized muscle fibers located in the walls of the ventricles of the heart. These fibers rapidly conduct the electrical signals to synchronize the contraction of the ventricles and pump blood out of the heart.
Purkinje cells are specialized cardiac cells, whose purpose it is to spread the electrical signal from the atrioventricular (AV) node down through the right and left ventricles.
Inner ventricular walls of the heart, beneath the endocardium.
His bundle? or the Purkinje fibers?
purkinje fibers
When electrical impulses reach the Purkinje fibers, the ventricular myocardium contracts. This contraction occurs after the impulses have traveled through the heart's conduction system, triggering the ventricles to contract and pump blood out of the heart. This process is essential for maintaining effective blood circulation throughout the body.
AV Bundle
The impulse starts in the right atria in the sinus node, then travels through the intratrial fibers for atrial contraction, then travels down to the the av node where it is delayed, then travels down through the bundle branches to the purkinjee fibers to the ventricular myocardium for contraction.
The Purkinje fibers are located in the inner ventricular walls of the heart, just beneath the endocardium in a space called the subendocardium.
Sinoatrial (SA) Node or "Pacemaker"