ATRIAL FIBRILATION IN CORONARY ARTERY DISEASE PATIENTS: PLATELETS CHARACTERISTICS AND ECHOCARDIOGRAPHY INDEXES

The aim: To reveal the connections between platelets morphological and biochemical characteristics and echocardiography (TTE) indexes in patients with coronary artery disease (CAD) and atrial fibrillation (AF). Materials and methods: 300 patients were divided into 3 groups: first (CAD) – 149 patients with CAD but without arrhythmias, second (CAD+AF) – 124 patients with CAD and AF paroxysm and control group – 27 patients without CAD and arrhythmias. TTE was done by ALOKA SSD-5000. Platelets count (PC), mean platelet volume (MPV), platelets distribution width (PDW) and platelet-to-leucocyte ratio (PLR) was obtained by common blood count. Platelets amino acids spectrum was detected by method of ion exchange liquid column chromatography. Results: II group patients had significantly lower PC (12.20%) and higher MPV (9.30%) and PLR (41.12%) then in I group, P<0.05. II group patients had significantly higher levels of platelets isoleucine (10.73%), leucine (12.63%) and lower threonine (23.05%), serine (5.06%), glycine (32.21%), valine (30.83%) levels then in I group, P<0.05. II group patients had significantly higher levels of left atrium diameter (10.03%), left atrium volume (15.40%) and left atrium volume index (11.48%) then in I group, P <0.05. Left atrium volume and left atrium volume index were corelated with PC (r=-0.315 and r=-0.444 consequently), MPV (r=0.327 and r=0.331 consequently), PLR (r=0.313 and r=0.303 consequently) and platelets serine (r=-0.302 and r=-0.310 consequently), alanine (r=-0.306 and r=-0.355 consequently) and leucine (r=0.346 and r=0.311 consequently), P<0.05. Left ventricular mass and left ventricular mass index were corelated with MPV (r=0.308 and r=0.301 consequently), PLR (r=0.307 and r=0.305 consequently) and platelets arginine (r=0.366 and r=0.305 consequently), threonine (r=-0.474 and r=-0.383 consequently), serine (r=-0.387 and r=-0.361 consequently), alanine (r=-0.342 and r=-0.326 consequently), isoleucine (r=0.355 and r=0.328 consequently) and tyrosine (r=0.307 and r=0.321 consequently), P<0.05. Conclusions: Left atrium size and left ventricular mass are connected with MPV, PLR and platelets amino acids content: serine, threonine, alanine, leucine, isoleucine and tyrosine levels.