An irregular, often rapid heart rate that commonly causes poor blood flow. The heart's upper chambers (atria) beat out of coordination with the lower chambers (ventricles). This condition may have no symptoms, but when symptoms do appear they include palpitations, shortness of breath, and fatigue. Treatments include drugs, electrical shock (cardioversion), and minimally invasive surgery (ablation). Tikosyn: This medication is used to treat certain types of serious (possibly fatal) irregular heartbeat (such as atrial fibrillation/flutter). It is used to restore normal heart rhythm and maintain a regular, steady heartbeat. Dofetilide is known as an anti-arrhythmic drug. Cardioversion is a procedure used to return an abnormal heartbeat to a normal rhythm. This procedure is used when the heart is beating very fast or irregular. This is called an arrhythmia. Arrhythmias can cause problems such as fainting, stroke, heart attack, and even sudden cardiac death. Cardioversion is a medical procedure by which an abnormally fast heart rate or other cardiac arrhythmia is converted to a normal rhythm using electricity or drugs. Wikipedia People also search for: Catheter ablation, Defibrillation, Ablation, MORE Tachycardia refers to a heart rate that's too fast. How that's defined may depend on your age and physical condition. Generally speaking, for adults, a heart rate of more than 100 beats per minute (BPM) is considered too fast. Heart failure can occur if the heart cannot pump (systolic) or fill (diastolic) adequately. Symptoms include shortness of breath, fatigue, swollen legs, and rapid heartbeat. Treatments can include eating less salt, limiting fluid intake, and taking prescription medications. In some cases a defibrillator or pacemaker may be implanted.