"Lub" is Low (bottom valves closing). "Dub" is Distant (top valves closing).
To understand the sounds, one must first understand the two primary phases of the cardiac cycle: and diastole .
🔊 This is the shorter, sharper sound. It happens when the ventricles relax (Diastole). The aortic and pulmonary valves snap shut, preventing blood from flowing backward. Think of it as the "Refill." lub dub sounds systole diastole
The cardiac cycle is defined by the alternating states of the heart muscle.
Your heart’s secret rhythm: Lub Dub. 🫀🎧 "Lub" is Low (bottom valves closing)
Here is content written for the phrase broken down by format (social media, educational, and poetic).
🔊 This is the loudest sound. It happens when the ventricles contract (Systole). The mitral and tricuspid valves snap shut, pushing blood up and out to your lungs and body. Think of it as the "Push." 🔊 This is the shorter, sharper sound
Systole is the phase of the heartbeat where the cardiac muscle contracts and pumps blood from the chambers into the arteries.