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→The QT interval
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The normal value for QTc is: '''below 450ms for men and below 460ms for women'''. <cite>aha2</cite> | The normal value for QTc is: '''below 450ms for men and below 460ms for women'''. <cite>aha2</cite> | ||
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, as approximately 10% to 20% of the general population have a QTc > 440m s. For both men and women QTc > 500ms is considered highly abnormal.<cite>TdP</cite> | |||
If QTc is < 340ms [[Short_QT_Syndrome|short QT syndrome]] can be considered. | If QTc is < 340ms [[Short_QT_Syndrome|short QT syndrome]] can be considered. | ||
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#Indik pmid=16945790 | #Indik pmid=16945790 | ||
#T pmid=15842424 | #T pmid=15842424 | ||
#TdP pmid=20185054 | |||
</biblio> | </biblio> | ||
}} | }} | ||
[[Category:ECG Course]] | [[Category:ECG Course]] | ||