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==The QT interval==
==The QT interval==
[[File:Tangent QT.png|thumb|400px| The QT interval starts at the onset of the Q wave and ends where the tangent line for the steepest part of the T wave intersects with the baseline of the ECG. ]]
[[File:Tangent QT.png|thumb|400px| The QT interval starts at the onset of the Q wave and ends where the tangent line for the steepest part of the T wave intersects with the baseline of the ECG. ]]
'''The normal QTc interval'''
'''The normal QTc (corrected) interval'''
The QT interval indicates how fast the ventricles are repolarized, becoming ready for a new cycle.
The QT interval indicates how fast the ventricles are repolarized, becoming ready for a new cycle.
   
   
The normal value for QTc(corrected) 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>


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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