An ECG shows an RR interval of 0.36 s and a QT interval of 264 ms. Using Bazett's formula (QTc = QT / sqrt(RR)), what is the QTc?
Answer and explanation
Correct answer: C. 440 ms
- Step 1: sqrt(0.36) = 0.6.
- Step 2: QTc = 264 / 0.6 = 440 ms.
Answer
440 ms.
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