The Aortic Valve and Pulmonary Valve, which sit at the exits of the ventricles leading to the body and lungs. The "Lub" (S1 - First Heart Sound)
The human heart is a remarkable organ that beats around 100,000 times per day, pumping blood throughout our body. One of the most recognizable sounds associated with the heart is the "lub-dub" sound it makes. But have you ever wondered what causes this distinctive sound? the lub dub sound the heart makes is caused by
Sometimes, the two valves making the "dub" sound don't close at exactly the same time, creating a "split S2." This is often normal during deep breathing but can sometimes signal a medical issue . Summary Table: Heart Sounds at a Glance Valves Closing Cardiac Phase Characteristics Lub Mitral & Tricuspid Start of Systole Lower pitch, longer duration Dub Aortic & Pulmonary End of Systole Higher pitch, shorter duration The Aortic Valve and Pulmonary Valve, which sit
"Lub = closure of mitral and tricuspid valves; Dub = closure of aortic and pulmonary valves." But have you ever wondered what causes this
The lub-dub sound is caused by the opening and closing of the heart's valves. The heart has four valves: the tricuspid, pulmonary, mitral, and aortic valves. These valves play a crucial role in ensuring that blood flows in one direction through the heart.
The Mitral Valve and Tricuspid Valve, which sit between the upper atria and lower ventricles.
After the ventricles have finished pumping blood into the aorta and pulmonary artery, they begin to relax. The pressure in the arteries becomes higher than the pressure in the relaxing ventricles, causing the aortic and pulmonary valves to snap shut.