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 cycleFilling
  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

Drag to rotate · Scroll to zoom · Right-drag to pan · Click anatomy · Choose a rhythm to compare its beat and ECG. Drag to rotate · Pinch to zoom · Two-finger drag to pan · Tap anatomy · Choose a rhythm.

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.