Each side of the heart consists of an atrium and a ventricle which are two connected chambers. The atria (plural of atrium) are where the blood collects when it enters the heart. The ventricles ...

Each side of the heart consists of an atrium and a ventricle which are two connected chambers. The atria (plural of atrium) are where the blood collects when it enters the heart. The ventricles ...

This is termed “AV dissociation.” In this situation, the ventricles never see action potentials originating from the atria and compensate by making action potentials of their own. However ...

It starts in the sinus node, located in the right atrium, and travels through both atria to stimulate contraction. It then goes to the atrioventricular node and travels toward the ventricles to ...

Remember that all atrial action potentials must pass through the AV node to reach the ventricle. AV node ablation destroys this connection stopping any atrial activity from reaching the ventricle.

Up to 7% of myxomas arise in the ventricular cavities and are equally divided between the right and left ventricles, and unlike the atria, they are not usually attached to the ventricular septum.