Abstract
Aims: To show 2 examples in which the analysis of the effect of bundle branch block on orthodromic reciprocating tachycardia cycle length was misleading. Methods and results: We performed an electrophysiological study in two patients with orthodromic reciprocating tachycardia showing a transition from wide to narrow QRS during tachycardia. Our two cases of left bundle branch block during reciprocating tachycardia using infero-septal pathways show that ventricular to atrial conduction time prolongation may be larger than 30 ms and may be concealed by a shortening of atrial to ventricular conduction time. In the 2 cases, the atrial insertion of the accessory pathway could be successfully ablated from the right atria at the ostium of the coronary sinus. Conclusions: The observation of the association between left bundle branch block and cycle length prolongation during reciprocating tachycardia may be associated with a successful ablation at the ostium of the coronary sinus.
Original language | English |
---|---|
Pages (from-to) | 920-922 |
Number of pages | 3 |
Journal | Europace |
Volume | 9 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2007 Oct 1 |
Externally published | Yes |
Keywords
- Ablation
- Accessory pathway
- Bundle branch block
ASJC Scopus subject areas
- Cardiology and Cardiovascular Medicine
- Physiology (medical)