Conduction: Difference between revisions

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===Examples===
===How to measure QT if the QT segement is abnormal===
<div align="left">
<div align="left">
<gallery>
{| class="wikitable"
Image:lastigeQT1.png|The T wave is broad, but the tangent crosses the baseline before the T wave joins the baseline. The QT interval would be overestimated when this last definition of the end of the T wave would be used.
!colspan='3'|How to measure QT if the QT segement is abnormal
Image:lastigeQT2.png|The ECG does not meet the baseline after the end of the T wave. Still, the crossing of the tangent and baseline should be used for measurements.
|-
Image:lastigeQT3.png|A bifasic T wave. The tangent to the 'hump' with the largest amplitude is chosen. This can change from beat to beat, making it more important to average several measurements.
|[[File:lastigeQT1.png|250px]]
</gallery>
|[[File:lastigeQT2.png|250px]]
|[[File:lastigeQT3.png|250px]]
|-
|The T wave is broad, but the tangent crosses the baseline before the T wave joins the baseline. The QT interval would be overestimated when this last definition of the end of the T wave would be used.
|The ECG does not meet the baseline after the end of the T wave. Still, the crossing of the tangent and baseline should be used for measurements.
|A bifasic T wave. The tangent to the 'hump' with the largest amplitude is chosen. This can change from beat to beat, making it more important to average several measurements.
|}
</div>
</div>


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