What is atrial fibrillation?

Most of the time the heart can hold a beat, but sometimes it can sound off-rhythm or wonky. Learn about abnormal heart sounds in today's #ClinicalCuts! If you put a stethoscope over the chest, you’ll usually hear something that sounds like "lub dub, lub dub, lub dub," which repeats over and over again with each cardiac cycle, or heartbeat. In total, our heart has four valves. • Two atrioventricular valves on the left side, between the atria and the ventricles: the tricuspid valve and the mitral