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How a VC Can Affect Your Heart PVCs are common and can be experienced by many people without causing any problems. If they happen frequently, PVCs may weaken your heart and increase your chance of suffering from heart failure. The rhythm of your heart is usually controlled by a group of fibers located in the upper right corner of your heart. This is known as the sinoatrial node, or SA. Electrical signals travel to lower heart chambers or ventricles. Causes PVCs occur when the electrical impulse that normally starts yo
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