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QTc Calculator — Free Online Tool
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QTc Calculator

Calculate Corrected QT (QTc) interval for ECG interpretation

Cardiology Guidelines: The Corrected QT (QTc) interval adjusts the measured QT interval for heart rate. Enter the measured QT interval, heart rate, patient sex, and select the correction formula below.
ECG Parameters Input

Calculation Results

⚠️ Not medical advice. For cardiology, electrophysiology, and clinical reference only. ECG interpretation, QTc prolongation assessment, and arrhythmia management must be supervised strictly by a qualified cardiologist or physician.

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