The heart is a muscular organ composed of four chambers: two upper chambers called atria and two lower chambers called ventricles. These four chambers pump blood through the body in a rhythmic pattern ...

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 ...

Medically reviewed by Yasmine S. Ali, MD, MSCI Bigeminy is an irregular heart rhythm where every normal beat is followed by ...

The mitral valve is positioned between the heart’s left atrium and ventricle. It opens to allow blood to flow into the left ventricle and closes to prevent backflow into the left atrium.

Reduced atrial function over time can increase pressure and impair the ability of the lower chamber of your heart, called the left ventricle, to pump blood. This may contribute to the development ...

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 ...

A 76-year-old woman presents with a persistently rapid heart rate that she attributes to her pacemaker. What does the ECG show?

Atrial Fibrillation (Afib) is a common, yet serious heart condition that requires proper diagnosis and management strategies.

A Gerbode defect is technically a type of ventricular septal defect, although this results in a left ventricular to right atrial shunt ... in symptoms of congestive heart failure.

Atrial fibrillation is the most common chronic arrhythmia. It is characterized by erratic atrial electrical activity with atrial rates of 400 to 600 beats per minute. The P wave is absent on the ...

Atrial functional mitral regurgitation (AFMR) is a common type of MR linked to high rates of heart failure, highlighting the ...

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 ...