Author/Authors :
Gaglia Jr.، نويسنده , , Michael A. and Torguson، نويسنده , , Rebecca and Pakala، نويسنده , , Rajbabu and Xue، نويسنده , , Zhenyi and Sardi، نويسنده , , Gabriel and Mahmoudi، نويسنده , , Michael and Suddath، نويسنده , , William O. and Kent، نويسنده , , Kenneth M. and Satler، نويسنده , , Lowell F. and Pichard، نويسنده , , Augusto D. and Waksman، نويسنده , , Ron، نويسنده ,
Abstract :
Previous research has suggested that obesity is associated with increased high on-treatment platelet reactivity. We therefore tested platelet reactivity in 251 patients with VerifyNow P2Y12, vasodilator-stimulated phosphoprotein phosphorylation, and light transmission aggregometry with adenosine diphosphate 5 and 20 μM 6 to 24 hours after percutaneous coronary intervention. High on-treatment platelet reactivity was defined as a maximum platelet aggregation ≥46% for light transmission aggregometry with adenosine diphosphate 5 μM or ≥60% for 20 μM, platelet reactivity index ≥50% for vasodilator-stimulated phosphoprotein phosphorylation, and P2Y12 reaction units ≥235 for VerifyNow. The relation between body mass index (BMI) and platelet reactivity values was examined with Spearman coefficients; BMI and high on-treatment platelet reactivity were assessed with Studentʹs t test. Multivariable logistic regression for high on-treatment platelet reactivity was also performed. Average BMI was 30.3 ± 5.9 kg/m2 and 44% of patients had a BMI ≥30 kg/m2. Overall there was very poor correlation between BMI and on-treatment platelet reactivity, with Spearman coefficients ranging from 0.08 to 0.10. BMI was also not associated with the various definitions of high on-treatment platelet reactivity. Multivariable logistic regressions showed no association between BMI and high on-treatment platelet reactivity. In conclusion, and contrary to previous reports, we found no association whatsoever between BMI and on-treatment platelet reactivity as quantified by a variety of platelet function tests.
