Wednesday, August 21, 2013

 Q: What are the normal QTc intervals in hospitalized patients?


According to a scientific statement from the American College of Cardiology (ACC) and the Heart Rhythm Society (HRS), the normal value for QTc in general population is: 
  • below 450ms for men and
  • below 460ms for women
But in a recent ACC consensus document an expert writing group suggest that in a hospital setting the upper limit be raised to the 99th percentile of normal:
  • 470ms in males and
  • 480 ms in females
(In any case, QTc more than 500ms is considered highly abnormal).

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