ObjectivesThis study aimed to evaluate the relationship between grayscale intravascular ultrasound-attenuated plaque (AP) and poststenting plaque prolapse (PP) as well as their influence on creatine kinase-myocardial band (CK-MB) elevation after drug-eluting stent (DES) implantation.BackgroundThe relationship between baseline AP and poststenting PP and their impacts on percutaneous coronary intervention (PCI) are not well known.Patients and methodsA total of 141 single, native, de-novo coronary lesions in 141 patients with normal pre-PCI CK-MB levels who underwent intravascular ultrasound before and after DES implantation were studied.ResultsAP was found in 72 (51.1%) lesions and PP occurred in 43 (30.5%) lesions. Baseline AP was associated with greater plaque area, lesion eccentricity, and positive remodeling, and was associated with higher frequency of poststenting PP (47.2 vs. 13.0%, P<0.001) as well as greater poststenting PP volume (2.21.3 vs. 1.9 +/- 1.1 mm(3), P=0.045). Elevated CK-MB levels were observed in 34 (24.1%) lesions and significantly more frequently in patients with baseline AP and poststenting PP than without both of these findings. Multivariate analysis indicated that AP with PP was the predictor of post-PCI CK-MB elevation.ConclusionBaseline AP was associated with high-risk characteristics, higher frequency, and greater volume of poststenting PP accompanied by CK-MB elevation in patients with DES implantation. (C) 2013 Wolters Kluwer Health vertical bar Lippincott Williams & Wilkins.