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Case Reports
. 2019 Jun 4;6(6):297-299.
doi: 10.1016/j.hrcr.2019.05.005. eCollection 2020 Jun.

A postsurgery atrial tachycardia with alternating cycle length: The possible circuits revealed by high-resolution mapping

Dongchen Zhou  1 , Wei Hu  2 , Gang Yang  2 , Hongwu Chen  2 , Biqi Zhang  1 , Jie Han  1 , Jian Yang  1 , Li Li  3 , Liangrong Zheng  1
Affiliations
Case Reports

A postsurgery atrial tachycardia with alternating cycle length: The possible circuits revealed by high-resolution mapping

Dongchen Zhou et al. HeartRhythm Case Rep. .
No abstract available

Keywords: Ablation; Alternating cycle length; Atrial tachycardia; High-resolution mapping; Postsurgery; Rhythmia.

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Figures

Figure 1
Figure 1
Coronary sinus (CS) signals and cycle length (CL) graph of atrial tachycardia. The CLs were alternating between 233 ms and 273 ms. In the CL 1 map, the beat acceptance criteria CL was set as 233 ± 5 ms (green band).
Figure 2
Figure 2
(A and B) Right posterior oblique views of cycle length (CL) 1 and CL 2 activation maps (A and B). Activation patterns showed the difference of the circuits and lines of block (white arrows and lines). Dotted red circles indicate the 2 isthmuses after the common isthmus. White lines indicate the anatomical block (incisional line). White dotted lines indicate the functional block (crista terminalis [CT] and isthmus 1).
Figure 3
Figure 3
Local activation sequences of the isthmuses of cycle length (CL) 1 map and CL 2 map. The signals at isthmus 1 alternating with double and single potentials (the roving probes and red arrows) indicated the intermittent conduction there. A: Local activation time (LAT) at position 2 and position 3 were similar in CL 1 map. B: LAT was significantly later at position 3 than at position 2 in CL 2 map. That also suggested the block at isthmus 1.
See this image and copyright information in PMC

References

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