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 ...

The heart is a muscular pump with four chambers: two upper chambers called atria, and two lower chambers called ventricles. These chambers are hollow and surrounded by muscle and other tissue.

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 twisting results in the shape of the heart and the positioning of the atria and ventricles seen in adult amniotes. In lungfish, the heart is partially divided into a right and left atrium. The ...

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 ...

Dear Doctors: I am a 47-year-old woman in good health. I exercise regularly and eat a healthy diet. At my physical, I was surprised when my doctor said I have A-fib. I have never felt anything ...

The heart has two upper chambers, called atria, which move blood to the lower chambers, called ventricles, which then pump the blood to the lungs and the rest of the body. Heartbeats are ...

The Lown-Ganong-Levine (LGL) syndrome occurs when an accessory pathway is congenitally present that directly connects the atria to the ventricles, bypassing the AV node similar to the Wolff ...

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 ...