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Complications could include:
Constrictive pericarditis is chronic inflammation of the pericardium, which is a sac-like membrane that surrounds the heart.
Cardiac tamponade is a very serious condition in which your heart can't pump enough blood to your body due to fluid buildup around your heart.
An arrhythmia occurs when electrical impulses, which direct and regulate heartbeats, don't function properly. Heart arrhythmias are common and usually harmless.
An abnormal heart rhythm is when your heart beats too fast, slow, or irregularly. This is also called an arrhythmia. Within the heart is a complex system of valves, nodes, and chambers that control how and when the blood is pumped.