Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Case Reports
. 2009 Sep;20(9):1071-3.
doi: 10.1111/j.1540-8167.2009.01485.x. Epub 2009 May 4.

Alternating cycle length during supraventricular tachycardia: what is the mechanism?

Eric Buch  1 , Roderick Tung, Michael Shehata, Kalyanam Shivkumar
Affiliations
Case Reports

Alternating cycle length during supraventricular tachycardia: what is the mechanism?

Eric Buch et al. J Cardiovasc Electrophysiol. 2009 Sep.
No abstract available

PubMed Disclaimer

Figures

Figure 1
Figure 1
Intracardiac tracings of a regularly irregular narrow-complex tachycardia with QRS alternans and cycle length alternans. Cycle length variability results from alternating VA intervals. HIS = His bundle catheter; P = proximal; D = distal; CS = coronary sinus catheter.
Figure 2
Figure 2
Diagnostic maneuver performed during tachycardia. During an attempt to entrain the tachycardia, ventricular pacing was performed at a rate slightly faster than the tachycardia's shorter cycle length. Tachycardia continues, but no effect on atrial cycle length was observed. After a few paced beats, the tachycardia terminates. HIS = His bundle catheter; P = proximal; D = distal; CS = coronary sinus catheter; RVA = RV catheter.
Figure 3
Figure 3
(A) Surface electrocardiogram of the second tachycardia after isoproterenol infusion stopped. 2:1 AV relationship is present. A–A intervals show cycle length alternans, while V–V intervals are constant. (B) Surface and intracardiac tracings of the same tachycardia depicted in A. 2:1 AV relationship is seen. HIS = His bundle catheter; P = proximal; D = distal; CS = coronary sinus catheter; RVA = RV catheter.
See this image and copyright information in PMC

References

    1. Buch E, Nakahara S, Shivkumar K. Diagnostic maneuver during narrow-complex tachycardia: What is the arrhythmia mechanism? Heart Rhythm. 2009;6:716–717. - PMC - PubMed
    1. Csanadi Z, Klein GJ, Yee R, Thakur RK, Li H. Effect of dual atrioventricular node pathways on atrioventricular reentrant tachycardia. Circulation. 1995;91:2614–2618. - PubMed
    1. Tai CT, Chen SA, Chiang CE, Lee SH, Chiou CW, Ueng KC, Wen ZC, Chen YJ, Chang MS. Multiple anterograde atrioventricular node pathways in patients with atrioventricular node reentrant tachycardia. J Am Coll Cardiol. 1996;28:725–731. - PubMed
    1. Otomo K, Nagata Y, Uno K, Fujiwara H, Iesaka Y. Irregular atypical atrioventricular nodal reentrant tachycardia: Incidence, electrophysiological characteristics, and effects of slow pathway ablation. Heart Rhythm. 2007;4:1507–1522. - PubMed
    1. Arya A, Kottkamp H, Piorkowski C, Schirdewahn P, Tanner H, Kobza R, Dorszewski A, Gerds-Li JH, Hindricks G. Differentiating atrioventricular nodal reentrant tachycardia from tachycardia via concealed accessory pathway. Am J Cardiol. 2005;95:875–878. - PubMed

Publication types

MeSH terms