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Left Atrial Volume Predicts the Risk of Atrial Fibrillation After Cardiac Surgery

A Prospective Study

Martin Osranek, MD, MSc^_*,_*, Kaniz Fatema, MD, PhD^_*, Fatema Qaddoura, MD^_*, Ahmed Al-Saileek, MD^_*, Marion E. Barnes, MSc^_*, Kent R. Bailey, PhD, Bernard J. Gersh, MB, ChB, DPhil, FACC^_*, Teresa S.M. Tsang, MD, FACC^_*, Kenton J. Zehr, MD and James B. Seward, MD, FACC^_*

^_* Division of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota.
Division of Biostatistics, Mayo Clinic, Rochester, Minnesota.
Department of Cardiovascular Surgery, Mayo Clinic, Rochester, Minnesota.

View larger version (16K): [in a new window]   Figure 1 Box plots of left atrial volume (LAV) according to diastolic function grade (DFG). Using linear regression, the correlation coefficient r was 0.56 (p < 0.0001).

View larger version (14K): [in a new window]   Figure 2 (A) Incidence of different types of postoperative atrial fibrillation (AF) (single episode, multiple episodes, persistent more than 24 h) according to quartiles of left atrial volume (LAV). (B) Survival free from postoperative AF stratified by quartiles of LAV.

View larger version (19K): [in a new window]   Figure 3 Survival free from postoperative atrial fibrillation stratified by left atrial volume and age.