| Long QT syndrome (LQTS) is a disorder of
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| | repolarization. The QT interval is
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| the heart's electrical system. People
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| | measured from the Q point to the end of
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| with this syndrome are susceptible to an
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| | the T wave. People who have LQTS are at
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| abnormally rapid heart rhythm called
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| | risk for syncope and sudden death, often
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| "Torsade des pointes." Long QT syndrome
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| | at a young age.
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| is characterized by a prolongation of the
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| | Causes of Long QT syndrome
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| QT interval on ECG and a propensity to
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| | The common causes and risk factor's of
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| ventricular tachyarrhythmias, which may
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| | Long QT syndrome include the following:
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| lead to syncope, cardiac arrest, or
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| | LQTS can be caused by certain medicines,
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| sudden death. LQTS is usually inherited
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| | or it can be the result of a stroke or
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| as an autosomal dominant trait. In the
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| | some other neurologic disorder.
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| case of LQT1, which has been mapped to
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| | Heart medications.
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| chromosome 11, mutations lead to serious
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| | Lipid-lowering medications.
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| structural defects in the person's
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| | Psychotropic medications.
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| cardiac potassium channels that do not
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| | Blood relatives of family members with
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| allow proper transmission of the
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| | LQTS.
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| electrical impulses throughout the heart.
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| | You also have an increased risk for LQTS
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| It is associated with syncope (loss of
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| | if other members of your family have the
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| consciousness) and with sudden death due
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| | disorder.
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| to ventricular arrhythmias. In the long
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| | Symptoms of Long QT syndrome
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| Q-T syndrome, the above-described Q-T
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| | Some sign and symptoms related to Long QT
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| interval is prolonged. Arrhythmias in
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| | syndrome are as follows:
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| individuals with LQTS are often
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| | Abnormal heart rhythms.
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| associated with exercise or excitement.
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| | Seizures.
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| The cause of sudden cardiac death in
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| | Sudden shortness of breath.
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| individuals with LQTS is ventricular
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| | Fainting: In people with long QT
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| fibrillation. Congenital LQTS is a rare
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| | syndrome, fainting spells (syncope) are
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| disorder that is usually inherited
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| | caused by the heart temporarily beating
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| (passed down through family members).
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| | in an erratic way.
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| It usually affects children or young
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| | Sudden death.
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| adults. In other cases, LQTS can be
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| | Sudden chest pain.
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| caused by certain medicines, or it can be
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| | In one type of inherited long Q-T
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| the result of a stroke or some other
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| | syndrome, the person is also deaf.
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| neurologic disorder. LQTS can lead to an
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| | Treatment of Long QT syndrome
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| abnormal heart rhythm (arrhythmia);
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| | The common causes and risk factor's of
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| fainting or loss of consciousness
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| | Long QT syndrome include the following:
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| (syncope); or even sudden death. Long QT
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| | There are treatments for long Q-T
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| syndrome may explain some rare instances
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| | syndrome, including medications such as
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| of sudden death in young people where no
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| | beta blockers.
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| obvious cardiac heart abnormality is
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| | Some people may benefit from an
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| found. People with this syndrome may show
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| | implantable defibrillator.
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| prolongation of the Q-T interval during
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| | Propranolol and nadolol are the
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| physical exercise, intense emotion (such
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| | beta-blockers most frequently used,
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| as fright, anger or pain), or by a
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| | though atenolol and metoprolol are also
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| startling noise. In LQTS, QT prolongation
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| | prescribed in patients with LQTS.
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| can lead to polymorphic ventricular
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| | When LQTS causes uncontrolled ventricular
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| tachycardia, or torsade de pointes, which
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| | fibrillation, you might need an
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| itself may lead to ventricular
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| | implantable cardioverter defibrillator
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| fibrillation and sudden cardiac death.
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| | (ICD). An ICD is a device that sends an
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| Individuals with LQTS have a prolongation
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| | electric shock to your heart to restore a
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| of the QT interval on the ECG. The Q wave
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| | normal heartbeat.
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| on the ECG corresponds to ventricular
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| | For many people with LQTS, the
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| depolarization while the T wave
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| | implantable defibrillator is the best
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| corresponds to ventricular
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| | treatment.
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