Miniature-sized heart chambers called ventricles have been 3D printed with live human heart muscle cells and shown to beat on their own for at least three months. Artificial heart tissue can be ...

(Photo Credit: iStock/Getty Images) The atria and ventricles work together, contracting and relaxing to pump blood out of the heart. As blood leaves each chamber of the heart, it passes through a ...

A patent foramen ovale or PFO is a defect in the wall between the two upper chambers of the heart. This defect is actually an incomplete closure of the atrial wall that results in a flap or valve-like ...