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Conduction: Difference between revisions
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→The QT interval
(→The PQ interval: added that PQ/PR prolongation can be caused by increased vagal tone or pharmacologically induced) |
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==The QT interval== | ==The QT interval== | ||
The QT interval indicates how fast the ventricles are repolarized and how fast they are ready for a new heart cycle | The QT interval indicates how fast the ventricles are repolarized and how fast they are ready for a new heart cycle | ||
The normal value for QTc(orrected) is: 440ms for men and 450 ms for women. | The normal value for QTc(orrected) is: 440ms for men and 450 ms for women. <cite>Moss</cite> | ||
[[Image:QRSinterval.jpg|thumb| The QT interval start 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. Click on the image for a bigger image]] | [[Image:QRSinterval.jpg|thumb| The QT interval start 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. Click on the image for a bigger image]] | ||