Fainting or losing consciousness Chest pain Dizziness Nausea Rapid heartbeat (tachycardia) Shortness of breath.jpg)
A problem in the electrical impulses travelling through the heart after a first heart attack Problems resulting from a scar in the heart's muscle tissue from a previous heart attack A previous episode of ventricular fibrillation A previous heart attack Congenital heart defect Heart muscle disease (cardiomyopathy) Injuries that cause damage to the heart muscle, such as electrocution Use of illegal drugs, such as cocaine or methamphetamine Significant electrolyte abnormalities, such as with potassium or magnesium 
Cardiologist
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