3. Probability of Origin
• 80% of all wide complex tachycardia (WCT) is of
ventricular origin (VT)
• In patients with structural heart disease, 95% of all WCT
is VT
7. Features of VT
• Abnormal and wide QRS
• The rate is usually 140 – 200 bpm
• It is usually regular
• Abrupt onset and termination
• AV dissociation
• Capture beat
• Fusion beat
19. 26 year old male with palpitations and
dizziness
Notas do Editor
Apply the Brugada Criteria: RS is there, so go to next criteria: R to S is 100 or more , so you stop here it is VT, also from Hx, over 95 % chance that it is VT.
ARVD; Look for the epselon wave at the end of QRS in precordial leads , and T wave inversion in precordial leads.
Autosomal Domonant with various penetrence
80 % of all the Wide complex Tach are VT, and 95 % of all the WC Tach are VT in patients with structural heart disease. If palpitation started after MI, it is VT; but this tracing is an artifact. See the notes on the next slide.
Artifact: Look at the last beat ------Sinus without any compensatory pause, look at the intervals…………some are so short that are not possible due to ERP.You can also map the QRS complexes as indicated by the red arrows.
