that results as a side effect of medication or other
events). Family history of LQTS or sudden cardiac
death is an important diagnostic clue. When LQTS
is secondary, removing the cause often ends the
conductive irregularities. There are no known pre-
ventive measures for primary LQTS. Treatment
often controls symptoms and prevents life-threat-
ening arrhythmia.
See also CARDIAC ARREST; MEDICATIONS TO TREAT
CARDIOVASCULAR DISEASE; TAMPONADE, CARDIAC.long QT syndrome (LQTS) 75