Importance of QT interval in clinical practice #MMPMID25630313
Ambhore A; Teo SG; Bin Omar AR; Poh KK
Singapore Med J 2014[Dec]; 55 (12): 607-11; quiz 612 PMID25630313show ga
Long QT interval is an important finding that is often missed by electrocardiogram interpreters. Long QT syndrome (inherited and acquired) is a potentially lethal cardiac channelopathy that is frequently mistaken for epilepsy. We present a case of long QT syndrome with multiple cardiac arrests presenting as syncope and seizures. The long QTc interval was aggravated by hypomagnesaemia and drugs, including clarithromycin and levofloxacin. Multiple drugs can cause prolongation of the QT interval, and all physicians should bear this in mind when prescribing these drugs.