RT Book, Section A1 Zimmerman, Franklin H. SR Print(0) ID 1200101666 T1 Medication Effects and QT Syndromes T2 ECG Core Curriculum YR 2023 FD 2023 PB McGraw Hill Education PP New York, NY SN 9780071785211 LK accesscardiology.mhmedical.com/content.aspx?aid=1200101666 RD 2024/04/19 AB In this chapter we will review how the ECG is affected by medications, both cardiac and noncardiac. We’ll pay special attention to medications that prolong the QTc interval, which may predispose to life-threatening arrhythmias. Afterwards, we’ll discuss hereditary QT syndromes and other channelopathies that may pose a similar risk.