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Long QT Syndrome - Causes, Symptoms and Treatment Methods

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



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