Heart Attack Risk has grown recently. Sudden Cardiac Arrest, or SCA, occurs when the lower chambers of the heart, called ventricles, stop beating normally and start quivering very quickly and chaotic. This is called ventricular fibrillation or VF. When the ventricles fibrillate, they do not contract normally, making it difficult to pump blood or oxygen to the body. Often, VF can become so erratic that it can result in SCA. If SCA is not corrected immediately via a shock from an external defibrillator or an implantable cardioverter defibrillator (ICD), there is little chance of survival. SCA usually occurs without any warning. However, symptoms include sudden collapse, loss of consciousness, abnormal breathing, an inability to find a pulse and loss of blood pressure.
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