Long QT syndrome is a potentially fatal heart rhythm disorder that causes fast, erratic heartbeats that often trigger seizures or fainting, according to Mayo Clinic. Genetic mutations and some medications and medical con... More »

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Long QT syndrome is a heart rhythm condition characterized by rapid and uneven heartbeats that can cause fainting spells or seizures, according to Cleveland Clinic. In severe cases the condition can result in death. More »

www.reference.com Health Conditions & Diseases

Long QT syndrome is a heart rhythm condition characterized by rapid and uneven heartbeats that can cause fainting spells or seizures, according to Cleveland Clinic. In severe cases the condition can result in death. More »

www.reference.com Health Conditions & Diseases

The primary cause of a massive heart attack or sudden cardiac arrest is a problem with the heart's electrical system which produces an abnormality in heart rhythm, according to Mayo Clinic. Cardiac arrest occurs when err... More »

Coronary artery disease, high blood pressure, cardiomyopathy, diabetes and smoking are causes of missed heartbeats, according to Mayo Clinic. An occurring heart attack, excessive alcohol consumption, stress, hypothyroidi... More »

www.reference.com Health Conditions & Diseases Cardiac Health

A bundle branch block is a heart complication that occurs when the electrical impulses that control heartbeats are delayed, according to Mayo Clinic. An obstruction may block one of the pathways, or bundles, leading to t... More »

www.reference.com Health Conditions & Diseases Cardiac Health

Symptoms of a weak heart muscle include breathlessness, swelling in lower extremities, fatigue, irregular heartbeats and dizziness, according to Mayo Clinic. Cardiomyopathy is the technical term for this condition. These... More »

www.reference.com Health Conditions & Diseases Cardiac Health