A wide QRS tachycardia with the short and long ventriculoatrial interval in the presence of an atriofascicular pathway: What is the mechanism?

Multiple wide QRS tachycardias in the same individual with ischemic cardiomyopathy

“…Whereas Figure 6A showed the AVNRT with LBBB, Figure 6B revealed the classical AVNRT onset with RBBB morphology, and finally, Figure 6C detected a fast VT with a higher degree retro block 18 . Since we could not induce a VT after the successful slow pathway ablation from both the right and left side, 19 we performed only substrate ablation for his VT. This case highlights the complexity of multiple mechanisms of tachycardia co‐existing in same individual 20 …”

Wide complex tachycardia with negative precordial concordance: All that glitters is not gold

“…A WCT may result from supraventricular tachycardia (SVT) with bundle branch block (pre‐existing or tachycardia‐related), SVT with atrioventricular conduction over an accessory pathway (AP), or ventricular tachycardia (VT) 1–8 . Double tachycardia is uncommon but should always be in differential diagnosis in the presence of CL or QRS morphology change.…”