Related Experiment Videos
Quantitative angiographic follow-up studies on the development of coronary artery disease: which coronary segments
S Jost1, J Deckers, W Rafflenbeul
1Division of Cardiology, Hannover Medical School, Germany.
Insights
Coronary artery disease progression and regression are not affected by segment diameter or location. However, new lesions in follow-up angiograms are more frequent in distal segments and those 2-3 mm in diameter.
Area of Science:
- Cardiology
- Medical Imaging
- Atherosclerosis Research
Background:
- Coronary artery disease (CAD) evolution requires understanding which segments are most affected by atherosclerosis.
- Identifying key coronary segments for analysis is crucial for accurate disease assessment.
- Previous studies have not definitively established the influence of segment diameter and location on CAD progression.
Purpose of the Study:
- To investigate the correlation between the progression and regression of coronary artery disease and the diameter and location of coronary segments.
- To determine which coronary segments are predominantly involved in atherosclerosis for optimized analysis in follow-up studies.
Main Methods:
- Utilized data from the INTACT-study involving 348 patients with coronary artery disease.
- Performed quantitative analysis (CAAS) on standardized coronary angiograms repeated within 3 years.
- Defined and analyzed 25 different coronary segments, including anatomic variants.
Main Results:
- Progression and regression of coronary stenoses (>20% diameter stenosis) were not influenced by segment diameter or location.
- The number of new lesions (stenoses and occlusions) per coronary segment differed significantly based on diameter (p < 0.001) and location (p < 0.001).
- New lesions were more frequent in distal segments and segments with diameters between 2-3 mm, but less frequent in segments < 2 mm.
Conclusions:
- Angiographic follow-up studies should include coronary segments at all locations.
- Segments with diameters smaller than 2 mm may be less critical for analysis due to a lower incidence of new lesions.
- Focusing on specific segment characteristics can refine the analysis of coronary artery disease evolution.
Abstract:
Angiographic follow-up studies on the evolution of coronary artery disease are of increasing relevance. It has still to be evaluated which coronary segments are predominantly involved in the process of atherosclerosis and, thus, should be preferably included in the analysis. Therefore, the correlation of progression and regression of coronary disease with the diameter and location (proximal, mid or distal) of coronary segments was investigated from the data of the INTACT-study, in which 25 different coronary segments were defined including anatomic variants of rather distal segments. In 348 patients with coronary artery disease, standardized coronary angiograms were repeated within 3 years and were quantitatively analyzed (CAAS). In 1063 coronary stenoses (% diameter stenosis > 20%) compared from both angiograms, progression and regression were not influenced by diameter nor location of arterial segments. In the follow-up angiograms, the number of new lesions (stenoses and occlusions) per coronary segment differed with regard to segment diameter (> 3 mm: 64/1125 (6%); 2-3 mm: 139/1967 (7%); < 2 mm: 44/1756 (2%); p < 0.001) and location of segments (proximal: 86/1285 (7%); mid: 84/1193 (7%); distal: 77/2370 (3%); p < 0.001). Out of 77 distal new lesions, only 25 (32%) were found in segments < 2 mm in diameter. Since the absolute number of new lesions was high in distal coronary segments, but low in segments with diameters < 2 mm, angiographic follow-up studies should analyze coronary segments at any location, but may neglect segments with diameters smaller than 2 mm.