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 stimulates the upper chambers (left and right atria) to contract to pump blood down to the lower chambers (ventricles). The electrical impulse travels to an area called the atrioventricular ...

The heart pumps blood around the body and has four chambers. The atria are at the top, and the ventricles are at the bottom. Typically, electrical signals travel from the atria to the ventricles ...

round P wave as electricity stimulates the atria. The P waves are followed by a period of no activity, or PR interval, before ...

This represents the time that it takes for the electrical impulse generated in the sinus node to travel through the atria and across the atrioventricular node to the ventricles. The normal PR ...

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 ...