Comparison of automated quantitative coronary angiography with caliper measurements of percent diameter stenosis
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Sex differences in assessing stenosis severity between physician visual assessment and quantitative coronary angiography
2022, International Journal of CardiologyCitation Excerpt :However, the limitation of PVA is high inter- and intra-observer variability in estimating stenosis severity. In contrast, quantitative coronary angiography (QCA), a computer-assisted technique, is objective with high reproducibility [6]. Differences between observer assessment of stenosis severity by PVA versus QCA have been reported to range from 15% to 45% [7–10].
Computerized technologies informing cardiac catheterization and guiding coronary intervention
2021, American Heart JournalCitation Excerpt :Quantitative coronary angiography (QCA) has evolved as the dominant automated approach for reproducible quantification of lesion severity in coronary arteries. QCA superseded earlier efforts including manual segmentation and electronic calipers by leveraging automated edge detection algorithms to identify the contrast-enhanced lumen on cineangiography and is more accurate and reproducible than expert analysts in assessing lumen stenosis.1,2 Several QCA systems are currently available and have found extensive use in recent years in estimating lumen dimensions and planning treatment, as well as in research to examine the efficacy of novel therapeutic strategies and stent platforms.
Chest pain in the absence of obstructive coronary artery disease: A critical review of current concepts focusing on sex specificity, microcirculatory function, and clinical implications
2019, International Journal of CardiologyCitation Excerpt :The most objective and accurate assessments, however, may be obtained by computer assisted systems with automated edge detection, so-called ‘quantitative coronary angiography (QCA)’, which has become the standard in current clinical investigations [48]. Compared with state of the art QCA systems visual assessments and caliper measurements tend to overestimate lesions causing <70% lumen diameter reduction [49–51]. Since usually a cutoff of 50% diameter reduction is used to separate obstructive from non-obstructive lesions it is unlikely that visual or caliper assessments have led to a significant number of false classifications as non-obstructive disease.
Two and Three-Dimensional Quantitative Coronary Angiography
2009, Cardiology ClinicsPredictive value of associations between carotid and coronary artery disease in patients with acute coronary syndromes
2005, American Journal of CardiologyImpact of carotid arterial narrowing on outcomes of patients with acute coronary syndromes
2004, American Journal of Cardiology