title: Impact of PVCs noted during coronary calcium scan on image quality and accuracy in subsequent coronary dual-source CT angiography.
abstract: The purpose of this study was to investigate the impact of the presence of one or more premature ventricular contractions (PVCs) during coronary calcium score scan (CS) on image quality and accuracy of subsequent dual-source coronary CT angiography (DS CCTA). Fifty-three out of 502 patients showed one or more PVCs during CS and built the study group. Sixty consecutively registered patients with sinus rhythm formed the control group. Two independent, blinded readers classified 1,723 coronary artery segments as being of diagnostic or non-diagnostic image quality. All segments with diagnostic image quality were assessed for the presence for significant coronary artery stenosis. Accuracy was calculated using conventional angiography as standard of reference. The percentage of DS CCTA data sets with diagnostic image quality was significantly lower in the study group (79.2%) compared to the control group (90.6%, P < 0.05). The rate of coronary segment with diagnostic image quality was highly significant lower in the study group (89.5%; n = 723/808) compared to the control group (99.4%; n = 908/915; P < 0.001). However, accuracy did not differ in both groups. Significant correlation between non-diagnostic image quality and mean HR was only found in the study group (P = 0.019). The presence of one or more PVCs during CS does not affect accuracy but impairs image quality of subsequent DS CCTA. Mean HR is a predictor of non-diagnostic data sets only in the study group, suggesting more aggressive HR control could be beneficial.
authors.affiliation: Department of Radiology, Hospital Klagenfurt, Sankt Veiter Strasse 47, 9020 Klagenfurt, Austria. diagnostic@gmx.at
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Eicher
authors.forename: Thomas
authors.initials: T
authors.lastname: Kau
authors.forename: Martin
authors.initials: M
authors.lastname: Niedermayer
authors.forename: Birgit
authors.initials: B
authors.lastname: Senft
authors.forename: Maria
authors.initials: M
authors.lastname: Sinzig
authors.forename: Birgit
authors.initials: B
authors.lastname: Strozyk
authors.forename: Klaus Armin
authors.initials: KA
authors.lastname: Hausegger
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016477:Artifacts; D001317:Austria; D002114:Calcinosis / Q000150:complications / Q000000981:diagnostic imaging* / Q000503:physiopathology; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D017023:Coronary Angiography / Q000379:methods*; D023921:Coronary Stenosis / Q000150:complications / Q000000981:diagnostic imaging* / Q000503:physiopathology; D016002:Discriminant Analysis; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011446:Prospective Studies; D011857:Radiographic Image Interpretation, Computer-Assisted; D014057:Tomography, X-Ray Computed; D018879:Ventricular Premature Complexes / Q000150:complications* / Q000503:physiopathology