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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 »

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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 »

www.reference.com Health Conditions & Diseases Cardiac Health

A normal QT interval is between 350 and 440 milliseconds, according to PubMed. A person's QT interval can change, however, based on the state of his physiology and metabolic processes at the time of the ECG. More »

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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 »

www.reference.com Health Conditions & Diseases Cardiac Health

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