Cardiology Coding Alert
Reader Questions:
Use 794.31 for Prolonged QTc Interval
Published on Mon Nov 22, 2004
Question: My cardiologist documented a prolonged QTc interval. What diagnosis code should I use? Answer: You should use 794.31 (Abnormal electrocardiogram [ECG] [EKG]).
Wisconsin Subscriber
The QT interval is an indirect measure of the duration of the ventricular action potential (depolarization) and ventricular refractory period (repolarization). The length of the QT interval depends on the patient's heart rate. Therefore, the QT interval is usually corrected for the heart rate and denoted as "QTc."
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