Type of Surgery

How the heart works

This narrated animation shows how blood flows through the various chambers of the heart and the electric system that controls the heart muscle's pumping action.


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Coronary Angiography

This video describes how the circulatory system works, how disease can affect blood vessels (atherosclerosis), and how doctors use angiography to test for coronary artery blockage.

The Pacemaker of the Heart

Tiny electric currents flow through the heart muscle and cause them to contract, squeezing blood throughout the body. This animation shows the electrical system of the heart and how it is driven by a small patch of tissue called the cardiac pacemaker or sinoatrial node.