Mobitz Type I Heart Block Animation

The animation below shows how your heart's electrical system works and what happens during second-degree, Mobitz type I heart block. Click the "start" button to play the animation. Written and spoken explanations are provided with each frame. Use the buttons in the lower right corner to pause, restart, or replay the animation, or use the scroll bar below the buttons to move through the frames.

The first part of this animation is the same as the animation in the section on understanding the heart’s electrical system and EKG results. If you want to skip directly to the frames on Mobitz type I, click the "skip intro" link above the start, pause, and replay buttons.

The first part of the animation shows how an electrical signal moves through your heart and how an EKG records your heart's electrical activity. The second part of the animation shows how a pause in the heart’s electrical signal can delay and momentarily block the contraction of the ventricles.

Source:
National Heart, Lung and Blood Institute