Anatomical Heart Simulator

Explore chamber anatomy, valve timing, pulmonary and systemic circulation, and a more physiologically faithful cardiac cycle.

Educational model · not diagnostic

Heartbeat

Heart rate72 bpm

Simulation speed1×

Slow motion changes only the playback speed. The selected BPM remains the physiological heart-rate reference.

Motion strength100%

Jump to cycle stage

Heart conditions

Normal heart

Reference mode with coordinated atrial and ventricular contraction and one-way valve flow.

Animation: normal valve timing and forward blood flow.

Condition modes are simplified teaching models. Use Slow Motion to study valve and flow changes. Real severity, anatomy, pressures, symptoms, and treatment vary from person to person.

Display

Anatomical labels Animated blood flow Valve labels Oxygenation colors

Live cycle

0%Cycle

0.83 sBeat duration

FillingStage

AV openValve state

Selected structure

Click a chamber or valve in the diagram.

Anatomy note

In an anterior view, the right ventricle forms most of the front surface of the heart. The left ventricle forms the left border and apex. The left atrium lies mostly posteriorly, so only part of it is prominent from the front.

Blood pathway

Body → right atriumSuperior and inferior vena cava return deoxygenated blood.

Right ventricle → lungsBlood exits through the pulmonary valve into the pulmonary trunk and arteries.

Lungs → left atriumPulmonary veins return oxygenated blood.

Left ventricle → bodyBlood exits through the aortic valve into the aorta.

Heart anatomy & motionAnterior cutaway teaching view · anatomical right appears on viewer’s left · vessels and chambers simplified for visibility

anterior cutawaypressure-driven valveslive circulation

Ventricular filling

Blood returns to the atria and moves through open atrioventricular valves into the ventricles.

Electrical rhythm

The ECG below is an illustrative timing trace synchronized with the simulation. It is not intended to reproduce a clinical ECG.

Deoxygenated blood

Oxygenated blood

Valve leaflets

Myocardium

What changes during a beat

The ventricular myocardium shortens and thickens during systole while chamber volume falls. The atria contract late in diastole, just before ventricular systole.

Ventricular fillingTricuspid and mitral valves are open while the aortic and pulmonary valves remain closed.

DiastasisMid-diastolic filling slows as atrial and ventricular pressures approach each other.

Atrial systoleAtria contract late in diastole and complete ventricular filling.

Isovolumetric contractionAll four valves are briefly closed while ventricular pressure rises rapidly.

EjectionAortic and pulmonary valves open once ventricular pressure exceeds pressure in the aorta and pulmonary artery.