An ECG shows a QT interval of 400 ms and an R–R interval of 0.64 s. What is the corrected QT (Bazett's formula, QTc )?
Answer and explanation
Correct answer: C. 500 ms
- Step 1: .
- Step 2: ms.
Answer
500 ms.
Why not the others: 400 ms: No correction was applied. 625 ms: The R–R interval was not square-rooted. 320 ms: The QT was multiplied instead of divided by the root of the R–R interval.
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