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Inflammation of Atrium After Cardiac Surgery Is Associated With Inhomogeneity of Atrial Conduction and Atrial Fibrillation

Inflammation of Atrium After Cardiac Surgery Is Associated With Inhomogeneity of Atrial... Inflammation of Atrium After Cardiac Surgery Is Associated With Inhomogeneity of Atrial Conduction and Atrial Fibrillation Yosuke Ishii, MD; Richard B. Schuessler, PhD; Sydney L. Gaynor, MD; Kiyomi Yamada, MD; Annabel S. Fu, BS; John P. Boineau, MD; Ralph J. Damiano, Jr, MD Background—Atrial fibrillation (AF) is common after cardiac surgery. Abnormal conduction is an important substrate for AF. We hypothesized that atrial inflammation alters atrial conduction properties. Methods and Results—Normal mongrel canines (n24) were divided into 4 groups consisting of anesthesia alone (control group); pericardiotomy (pericardiotomy group); lateral right atriotomy (atriotomy group); and lateral right atriotomy with antiinflammatory therapy (methylprednisolone 2 mg/kg per day) (antiinflammatory group). Right atrial activation was examined 3 days after surgery. Inhomogeneity of conduction was quantified by the variation of maximum local activation phase difference. To initiate AF, burst pacing was performed. Myeloperoxidase activity and neutrophil cell infiltration in the atrial myocardium were measured to quantify the degree of inflammation. The inhomogeneity of atrial conduction of the atriotomy and pericardiotomy groups was higher than that of the control group (2.020.10, 1.510.03 versus 0.960.08, respectively; P0.005). Antiinflammatory therapy decreased the inhomogeneity of atrial conduction after atriotomy (1.160.10; P0.001). AF duration was longer in the atriotomy http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Circulation Wolters Kluwer Health

Inflammation of Atrium After Cardiac Surgery Is Associated With Inhomogeneity of Atrial Conduction and Atrial Fibrillation

Damiano, Ralph J.
Circulation , Volume 111 (22) – Jun 1, 2005
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References (27)

ISSN
0009-7322
eISSN
1524-4539
DOI
10.1161/CIRCULATIONAHA.104.475194
pmid
15927979
Publisher site
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Abstract

Inflammation of Atrium After Cardiac Surgery Is Associated With Inhomogeneity of Atrial Conduction and Atrial Fibrillation Yosuke Ishii, MD; Richard B. Schuessler, PhD; Sydney L. Gaynor, MD; Kiyomi Yamada, MD; Annabel S. Fu, BS; John P. Boineau, MD; Ralph J. Damiano, Jr, MD Background—Atrial fibrillation (AF) is common after cardiac surgery. Abnormal conduction is an important substrate for AF. We hypothesized that atrial inflammation alters atrial conduction properties. Methods and Results—Normal mongrel canines (n24) were divided into 4 groups consisting of anesthesia alone (control group); pericardiotomy (pericardiotomy group); lateral right atriotomy (atriotomy group); and lateral right atriotomy with antiinflammatory therapy (methylprednisolone 2 mg/kg per day) (antiinflammatory group). Right atrial activation was examined 3 days after surgery. Inhomogeneity of conduction was quantified by the variation of maximum local activation phase difference. To initiate AF, burst pacing was performed. Myeloperoxidase activity and neutrophil cell infiltration in the atrial myocardium were measured to quantify the degree of inflammation. The inhomogeneity of atrial conduction of the atriotomy and pericardiotomy groups was higher than that of the control group (2.020.10, 1.510.03 versus 0.960.08, respectively; P0.005). Antiinflammatory therapy decreased the inhomogeneity of atrial conduction after atriotomy (1.160.10; P0.001). AF duration was longer in the atriotomy

Journal

Circulation – Wolters Kluwer Health

Published: Jun 1, 2005

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