This work was supported by governmental funding of clinical research within the NHS and the Swedish Heart-Lung Foundation.
Left Atrial Posterior Wall Thickness in Patients with and without Atrial Fibrillation: Data from 298 Consecutive Autopsies
Article first published online: 13 FEB 2008
© 2008 Wiley Periodicals, Inc.
Journal of Cardiovascular Electrophysiology
Volume 19, Issue 7, pages 689–692, July 2008
How to Cite
PLATONOV, P. G., IVANOV, V., HO, S. Y. and MITROFANOVA, L. (2008), Left Atrial Posterior Wall Thickness in Patients with and without Atrial Fibrillation: Data from 298 Consecutive Autopsies. Journal of Cardiovascular Electrophysiology, 19: 689–692. doi: 10.1111/j.1540-8167.2008.01102.x
Manuscript received 7 November 2007; Revised manuscript received 30 November 2007; Accepted for publication 24 December 2007.
- Issue published online: 25 JUL 2008
- Article first published online: 13 FEB 2008
- atrial fibrillation;
- atrial anatomy
Introduction: Radiofrequency ablation of atrial fibrillation (AF) is associated with energy delivery on the posterior left atrial (LA) wall with small but significant risk of life-threatening complications. Anatomy of LA walls has been described, but wall thickness in patients with AF has not been studied systematically. The aim of the present study was to describe LA posterior wall thickness in patients with and without history of AF.
Methods and Results: Heart mass and LA wall thickness was measured during 298 consecutive autopsies (142 male, age 61 ± 17 years). LA posterior wall was measured at three levels: between the superior pulmonary veins (SPV), in the center of the posterior LA wall (CPV), and between the inferior pulmonary veins (IPV). Information about AF history was obtained from medical records. Fifty-nine subjects (20%) had documented AF. They were older than subjects without AF (74 ± 10 years vs 58 ± 17 years, P < 0.0001) and had greater heart mass (522 ± 114 g vs 389 ± 99 g, P < 0.0001). LA posterior wall thickness increased from the most superior to the most inferior measured level (2.3 ± 0.9 mm vs 2.5 ± 1.0 mm vs 2.9 ± 1.3 mm for SPV, CPV, and IPV, respectively; P < 0.001). Subjects with AF history had thinner LA posterior wall at CPV and IPV compared with those without AF.
Conclusions: LA posterior wall thickness is described on a large series of consecutive autopsies. LA posterior wall is found to be generally thinner in patients with history of AF. Study results have clinical implications for understanding complication risk and improvement of safety of AF ablation procedures.