Overview Of Heart Block: Abnormalities Of The Electrical System The rhythm of your heartbeat is determined by the electrical impulses generated by your sinoatrial node. These impulses start in the two upper chambers (i.e. atria) and work downward through the two lower chambers (i.e. ventricles). As they travel downward, they cause contractions in your atria [...]

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An Introduction To Coronary Artery Disease Before your heart can pump blood to the rest of your body, it must receive it from your coronary arteries. There are two main arteries that supply oxygenated blood to your heart: the left and the right. Both branch out into a network of other arteries. When a blockage [...]

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