Lub-dub Sound Of Heart

The silence stretched for a minute. Then two. Elias collapsed against the trunk, his own heart slowing in sympathy with the dying world. Then, a thunderous crash.

After your atria fill with blood, they contract. That pushes blood into the relaxed ventricles below. As the ventricles then squeeze to send blood onward, the two valves between the chambers—the mitral and tricuspid valves—suddenly close. That closing creates a low-pitched, longer sound: .

Here is the mechanics behind the music.

The tree flared into a blinding gold. Above ground, for the first time in a generation, people stopped. They didn't know why, but their chests felt heavy and warm. They looked at each other—really looked—and the rhythm caught like wildfire.

In some cases, a third or fourth sound appears, creating a rhythm that sounds like a galloping horse. While common in athletes or pregnant women, in older adults, a gallop can be an early sign of heart failure or stiffening of the heart walls. How to Listen lub-dub sound of heart

After the ventricles have squeezed all the blood out into the body and lungs, they relax. The pressure inside the ventricles drops instantly. At this point, the blood that was just pushed into the major arteries (the aorta and the pulmonary artery) tries to rush back into the heart due to gravity and pressure changes.

If you’ve ever pressed your ear to someone’s chest, placed a hand over your left ribs during a sprint, or watched a medical drama on TV, you know the sound well. It is the percussion section of the body’s orchestra: lub-dub, lub-dub, lub-dub. The silence stretched for a minute

What’s That Sound? The Story Behind Your Heart’s “Lub-Dub”

That’s the “dub” you hear—the end of the heartbeat’s working cycle. Then, a thunderous crash

The next time you feel your heart race during a workout or settle down as you fall asleep, take a second to appreciate those four valves. They are the hardest-working percussionists in the world.