Heart sounds are created from blood flowing through the heart chambers as the cardiac valves open and close during the cardiac cyc... National Institutes of Health (.gov) Heart sounds - Wikipedia Second heart sound. The second heart sound, or S2, forms the "dub" of "lub-dub" and is composed of components A2 (aortic valve clo... Wikipedia Technique: Heart Sounds & Murmurs - University of Washington The 2nd hear sound, S2 (dub), marks the end of systole (beginning of diastole). UW Homepage Cardiac cycle phases: Definition, systole and diastole 30 Oct 2023 —
No systole? No blood flow. No diastole? No time to refill. You need both for the perfect rhythm. 🩺 lub dub sounds systole diastole
Systole. The chamber contracts. Pressure peaks. Blood explodes into the aorta. The mitral valve whispers goodbye as it snaps shut. This is the sound of doing . Heart sounds are created from blood flowing through
Have you ever listened to your heartbeat? That steady isn't just one noise—it’s two different movements working in perfect sync. Wikipedia Technique: Heart Sounds & Murmurs - University
The marks Systole . This is the heart's power move. The bottom chambers—the ventricles—squeeze tight. The valves between the upper and lower chambers (the AV valves) slam shut. That slamming door? That’s your 'Lub.'
To understand the sounds, one must first understand the two primary phases of the cardiac cycle: and diastole .
The first heart sound, "lub," marks the start of . During this phase, the heart's lower chambers (ventricles) contract to pump blood out to the lungs and the rest of the body. How the Heart Works - How the Heart Beats | NHLBI, NIH