4,200
edits
Conduction: Difference between revisions
Jump to navigation
Jump to search
→The QT interval
| Line 44: | Line 44: | ||
'''A often used definition of the QT interval is the time between the beginning of the Q until the point where the steepest tangent line from the end of the T-wave intersects with the base line of the ECG.'''<cite>Lepeschkin</cite> | '''A often used definition of the QT interval is the time between the beginning of the Q until the point where the steepest tangent line from the end of the T-wave intersects with the base line of the ECG.'''<cite>Lepeschkin</cite> | ||
{| class="wikitable" | {| class="wikitable" | ||
|- | |||
!Stepwise approach to correct measurement of the QT interval|- | !Stepwise approach to correct measurement of the QT interval|- | ||
|- | |- | ||
| Line 53: | Line 54: | ||
#The QT interval starts at the beginning of the QRS interval and ends where the tangent and baseline cross. | #The QT interval starts at the beginning of the QRS interval and ends where the tangent and baseline cross. | ||
#If the QRS duration exceeds 120ms the amount surpassing 120ms should be deducted from the QT interval (i.e. QT=QT-(QRS width-120ms) ) | #If the QRS duration exceeds 120ms the amount surpassing 120ms should be deducted from the QT interval (i.e. QT=QT-(QRS width-120ms) ) | ||
#Calculate QTc according to Bazett: | #Calculate QTc according to Bazett: [[Image:Formule_QTc.png]] | ||
[[Image:Formule_QTc.png]] | |||
|} | |} | ||