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 ...

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 ...

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Small abnormal areas in either the atrium or the ventricle can cause "atrial tachycardia," and "ventricular tachycardia." Blocks at various points can cause slow heart rates and episodes of passing ...

The left atrium and left ventricle work together to receive the now-oxygen-rich blood exiting the lungs and to send it off to the tissues of the body. When someone has atrial fibrillation ...

Atrial flutter occurs when a “reentrant” circuit is present, causing a repeated loop of electrical activity to depolarize the atrium at a rate of about 250 to 350 beats per minute; the atrial ...

Atrial flutter is similar to atrial fibrillation in that the rhythm originates in the atrium and causes a narrow complex tachycardia, which carries thromboembolic risk. Typical atrial flutter ...

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 ...