Corrected QT Interval (QTc) Calculator

Calculate Your Corrected QT Interval (QTc)

Enter the measured QT interval from ECG in milliseconds.
Enter the patient's heart rate in beats per minute.

Quickly determine your Corrected QT Interval (QTc) using our easy-to-use calculator. The QTc helps assess heart rhythm health, identify potential risks like prolonged QT syndrome, and guide medication management. Understand if your QTc falls within normal ranges for better cardiac insight.

Formula:

The QTc interval is commonly calculated using Bazett's formula, which adjusts the QT interval for heart rate:
QTc (ms) = QT (ms) / √(60 / Heart Rate (bpm))

Where:

  • QT (ms): Measured QT interval from the electrocardiogram (ECG) in milliseconds.
  • Heart Rate (bpm): Patient's heart rate in beats per minute.
Note: This calculator uses Bazett's formula. Other formulas exist (e.g., Fridericia, Framingham) and may be preferred in specific clinical contexts.

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