Tachycardia: Difference between revisions

212 bytes removed ,  12 May 2011
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=Differentiation between SVT and VT=
=Differentiation between SVT and VT=


Differentiation between supraventricular tachycardias (SVT) and ventricular tachycardias (VT) can be challenging, especially in acute emergency settings. SVT's are rhythm disturbances in the atria or AV-nodal ring or rhythm disorders in which these structures are involved. VT's are rhythm disorders that only involve the ventricles. It can both take place in the myocardium and the conduction system tissue.
To differentiate between supraventricular tachycardias and ventricular tachycardias a 12 lead ECG is the cornerstone of the diagnostic process. At first, the physician has to make a differentiation between a small or broad complex tachycardia.


===Definitions:===
===Definitions:===
'''Tachycardia:'''
: heartrate above 100 bpm
'''Small complex tachycardia:'''  
'''Small complex tachycardia:'''  
: QRS duration < 120 ms.
: QRS duration < 120 ms.
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