When left atrial enlargement occurs, it takes longer for cardiac action potentials to travel through the atrial myocardium; thus, the P wave also lengthens. Therefore, the criteria for diagnosing ...

The left atrial appendage is the most common site for cardiac thrombus. It is anatomically attached to the left inferior portion of the left atrium and consists of muscular trabeculae. The left ...

The newly oxygen-rich blood (shown in red) returns to the heart and enters the left atrium. Blood flows through the left atrium into the left ventricle. The left ventricle pumps the oxygen-rich ...

CHICAGO -- For patients at high risk of stroke who underwent catheter-based atrial fibrillation ablation, left atrial appendage closure led to less bleeding compared with oral anticoagulation ...

The left-hand side pumps oxygenated blood around the body. 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 ...