What Makes The - Lub Dub Sound

It’s not the heart muscle contracting — it’s your !

If you hear a whoosh or swish instead of a clean lub-dub, that’s called a heart murmur — often harmless, but worth getting checked out. what makes the lub dub sound

👂 The pause between lub and dub? That’s your heart filling with blood. The pause after dub? That’s your heart resting before the next beat. It’s not the heart muscle contracting — it’s your