Building the heart…

Interactive 3D Heart

Anatomy & Atrial (Auricular) Fibrillation Explainer

Drag to rotate • Scroll to zoom • Click a chamber or vessel to learn about it

Cardiac cycle

  1. 1
    FillingAtria and ventricles relax
  2. 2
    Atrial contractionP wave
  3. 3
    AV delayAtria relax; ventricles fill
  4. 4
    Ventricular contractionQRS complex
  5. 5
    Ventricular relaxationT wave
Rhythm
Heart Rate 72 bpm
Normal Sinus Rhythm — bpm
P — atrial depolarization QRS — ventricular depolarization T — ventricular repolarization

Click any chamber or vessel on the heart to see details here.