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Background :

Assessing of myocardial atrial deformations in CABG patients as р redictor of perioperative cardiac arrhythmia K . Hristova, Tz. Katova, V. Kostova, I. Simova, N. Nesheva , L. Boijadjiev National Heart Hospital, Sofia, Bulgaria. Results:

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  1. Assessing of myocardial atrial deformations in CABG patients as рredictor of perioperative cardiac arrhythmiaK . Hristova, Tz. Katova, V. Kostova, I. Simova, N. Nesheva, L. BoijadjievNational Heart Hospital, Sofia, Bulgaria Results: The prevalence of perioperative AF in our group was relatively low in early the phase- 6 patients (20%).New events of AF did not register in all patients group until end of 1.month. We found significant differences for the LA volume index in the 1.month follow up (32,99ml/m2 ±6,1vs.29,85 ml/m2 ±6,8, p<0,05) vs. baseline in patients group with AF. In addition, there are not differences in the group with AF as in early phase, so 1mFU. Atrial strain (P<0.0001; coefficient, 0.015; SE, 0.003) and strain rate (P<0.0001; coefficient, 0.372; SE, 0.075) parameters alone were confirmed as independent predictors of sinus rhythm maintenance by multivariable analysis. Methods:We evaluated 35 patients ( mean age 62y ±14 ) without previous history of AF, undergoing elective CABG. Echocardiography was performed in all subjects and were scanned 1 day before revascularization (baseline),5 days after revascularization (CABG) – early phase and one month after CABF (1mFU). The images from apical long axis for four, three and two chamber view were acquired (frame rate 74 ± 6 frames/s) and analyzed offline in order to extract the strain (rate) curves. From these, the maximal systolic strain (PSS), peak strain rate (PSR) and peak velocity (PV) on right and left atrium were derived, using vector velocity imaging (VVI) software. Conventional measures of atrial function included peak transmitral and transtricuspidal A-wave velocity, A-wave velocity time integral, atrial volume index for the left and right atria. Background: Atrial fibrillation (AF) is the most common serious arrhythmia, encountered in clinical practice, especially by patients undergoing coronary artery bypass graft surgery (CABG). The aim of the study was to describe the atrial deformations in patients, undergoing operative revascularization and to correlate and make prognosis about risk for AF during perioperative phase.. Conclusions:The assessment of CABG patients is possible nowadays to reduce and make prognosis about the risk of occurrence AF. Patients with higher atrial strain and strain rate appear to have a greater likelihood of staying in sinus rhythm. Lower atrial strain and strain rate measurements may predict the perioperative risk of AF in CABG patients. Tabl.1 PSV, PSS and PSR on the LA ; * significance between baseline and follow up , p< 0,0001 EuroEcho 2010 Fig.1 VVI analyzes on the LA and RA strain rate

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