🫀 2D Heart Simulator: Pressure-Volume Loop, Wiggers Diagram, Elastance and Valve Lab

A live left-heart model: time-varying elastance ventricle, diode valves, three-element aortic Windkessel and venous reservoir, with pressure-volume loop, Wiggers diagram, Frank-Starling and heart-rate curves, valve disease and exercise presets, and seven in-page numerical checks (educational, synthetic data).