Cardiac Cycle

Cardiac Cycle teaches the beat from four cardinal points — not seven named phases to memorise. Two lines do not move: the aorta (high) and the atrium (low). The ventricle walks between them. A valve opens or shuts only when the moving line crosses a fixed line. 1 Mitral shuts · LUB 2 Aortic opens · silent 3 Aortic shuts · DUB 4 Mitral opens · silent Open the app and you get: • 4 Points — the two-line model, then Wiggers when you are ready • Heart — the cartoon ventricle • Venous — a, c, v waves in the same beat • Sounds — S1, S2, and why a murmur sits where it sits • Film — the four points on a recorded loop • Test — short questions on the same rule • Ref — sources, copyright, and this description The Four Cardinal Points is taught from the registered work “The Valve Clock Timing the Hearts Every Move” (Copyright Office, Government of India, L-29321/2025-CO). Teaching only. Simulated heart. Not a medical device. Not for diagnosis, monitoring, or patient care.