Left atrial dysfunction and new-onset atrial fibrillation after cardiac surgery.
OBJECTIVE
Postoperative atrial fibrillation is a common complication of carrying out cardiac surgery with extracorporeal circulation (ECC). The aim of this study was to determine whether preoperative left atrial contractile dysfunction, as assessed by tissue Doppler echocardiography, is associated with the development of postoperative new-onset atrial fibrillation (PAF).


METHODS
Transthoracic Doppler echocardiography was performed preoperatively in patients undergoing elective cardiac surgery. Left atrial contractile function was evaluated by tissue Doppler imaging (TDI) of the mitral annulus.


RESULTS
The study included 92 patients in sinus rhythm preoperatively who underwent elective cardiac surgery with ECC: 73 (79%) were male and 19 (21%) were female, and their mean age was 67 (10) years. Of these, 19 (20.6%) developed PAF 34 (12) h postoperatively. Bivariate analysis showed that PAF was associated with older age (71 [7] years vs 66 [10] years; P=.034), a large left atrial diameter (LAD), and a low peak atrial systolic mitral annular velocity (A velocity) and a high mitral E/A ratio on TDI. Logistic regression analysis showed that PAF was independently associated with a large LAD (odds ratio [OR] =2.23; 95% confidence interval [CI], 1.05-4.76; P=.033) and a low A velocity (OR=0.70; 95% CI, 0.55-0.99; P=.034).


CONCLUSIONS
Preoperative left atrial dysfunction, as assessed by TDI, was associated with an increased risk of PAF.
Iribarren
José L
JL
Servicio de Medicina Intensiva. Hospital Universitario de Canarias. La Laguna. Santa Cruz. España. joseluis.iribarren@gmail.com
Jiménez
Juan J
JJ
Barragán
Antonio
A
Brouard
Maitane
M
Lacalzada
Juan
J
Lorente
Leonardo
L
Pérez
Rosalía
R
Raja
Lorena
L
Martínez
Rafael
R
Mora
María L
ML
Laynez
Ignacio
I
D000368:Aged; D001281:Atrial Fibrillation / Q000209:etiology*; D002315:Cardiopulmonary Bypass / Q000009:adverse effects*; D015150:Echocardiography, Doppler; D017548:Echocardiography, Transesophageal; D005260:Female; D006325:Heart Atria / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D006801:Humans; D008297:Male; D011300:Preoperative Care; D012307:Risk Factors