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Assessment of Atrial Regional Wall Motion Using Strain Doppler Imaging During Biatrial Pacing in the Bradycardia‐Tachycardia Syndrome
Author(s) -
MATSUMOTO KATSUMI,
ISHIKAWA TOSHIYUKI,
SUMITA SHINICHI,
MATSUSHITA KOHEI,
INOUE NORIKO,
KOBAYASHI TSUKASA,
UCHINO KAZUAKI,
KIMURA KAZUO,
UMEMURA SATOSHI
Publication year - 2006
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.2006.00326.x
Subject(s) - medicine , atrial fibrillation , cardiology , atrium (architecture) , bradycardia , tachycardia , significant difference , atrial tachycardia , heart rate , catheter ablation , blood pressure
Biatrial pacing is expected to have preventive effects on atrial fibrillation.Methods: We evaluated atrial regional wall motion by strain Doppler imaging (SDI) in 6 patients (62.5 ± 11.3 [SD] years), who suffered from atrial fibrillation, with an implanted biatrial pacemaker. SDI was performed and atrial regional wall motion was estimated during biatrial (BiA) and right atrial appendage (RAA) pacing.Results: There was no significant difference in the interval from the pacing spike to the peak strain of the atrium in the lateral right atrium (LRA) between BiA and RAA pacing. However, there was a significant difference in the septal atrium (SA) between BiA and RAA pacing (225.0 ± 19.9 vs 267.2 ± 15.7 ms, P < 0.0001) and in the lateral left atrium (LLA) between BiA and RAA pacing (216.7 ± 21.6 vs 275.0 ± 16.2 ms, P < 0.0001). There were significant differences in the time difference of peak strain between BiA and RAA pacing in each atrial segment (LRA‐AS: 2.2 ± 5.9 vs 45.0 ± 11.9 ms, P = 0.0016, SA‐LLA: −8.3 ± 5.5 vs 7.8 ± 2.7 ms, P < 0.0011, LRA‐LLA: −6.1 ± 3.9 vs 52.8 ± 13.2 ms, P = 0.0002). There was no significant difference in the interval from the pacing spike to the inflection point of atrial strain (S‐I) of LRA. However, there were significant differences in S‐I of SA (83.9 ± 24.1 vs 129.9 ± 30.6 ms, P = 0.0086) and LLA (102.2 ± 37.9 vs 166.1 ± 13.4 ms, P = 0.0028).Conclusion: BiA pacing improved the synchronicity of regional wall motion of both atrium.