• Singap Med J · Dec 2014

    Case Reports

    Importance of QT interval in clinical practice.

    • Anand Ambhore, Swee-Guan Teo, Abdul Razakjr Bin Omar, and Kian-Keong Poh.
    • Department of Cardiology, National University Heart Centre, 1E Kent Ridge Road, NUHS Tower Block, Level 9, Singapore 119228. kian_keong_poh@nuhs.edu.sg.
    • Singap Med J. 2014 Dec 1; 55 (12): 607-11; quiz 612.

    AbstractLong 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.

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