Related Experiment Video
Updated: Aug 17, 2026
In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
Published on: February 16, 2016
The spatial pattern of coronary capillaries in patients with dilated, ischemic, or inflammatory cardiomyopathy
Rudolf Karch1, Friederike Neumann, Robert Ullrich
1Department of Medical Computer Sciences, Medical University of Vienna, Spitalgasse 23, Vienna A-1090, Austria. rudolf.karch@meduniwien.ac.at
Insights
Coronary capillary patterns become less regular and more spread out in heart failure patients with dilated cardiomyopathy (DCM), ischemic cardiomyopathy (ICM), and inflammatory cardiomyopathy (InfCM). This study reveals key differences in microvasculature in various heart failure types.
Area of Science:
- Cardiovascular Biology
- Cardiac Pathology
- Microcirculation Research
Background:
- Heart failure significantly impacts cardiac function and structure.
- Understanding coronary capillary patterns is crucial for diagnosing and treating heart conditions.
- Previous research has not fully elucidated microvascular changes in different types of end-stage heart failure.
Purpose of the Study:
- To compare coronary capillary patterns in healthy individuals versus patients with end-stage heart failure.
- To investigate specific patterns in dilated cardiomyopathy (DCM), ischemic cardiomyopathy (ICM), and inflammatory cardiomyopathy (InfCM).
- To quantify differences in capillary distribution and spacing across these conditions.
Main Methods:
- Histological analysis of resected heart tissue from patients with DCM, ICM, InfCM, and healthy controls.
- Quantitative assessment of capillary patterns using Voronoi polygon areas, nearest-neighbor distances, and intercapillary distances (ICD).
- Characterization of pattern regularity (regular, random, clustered) using the coefficient of variation (CV) and pair correlation function g(r).
Main Results:
- The coefficient of variation (CV) of capillary patterns increased progressively from control (30.5%) to DCM (33.8%), ICM (36.6%), and InfCM (40.3%), indicating reduced regularity.
- Nearest-neighbor distances (d) and intercapillary distances (ICD) were significantly larger in all heart failure groups compared to controls.
- The pair correlation function g(r) showed deviations from random distribution, with short-range order observed in control and DCM groups.
Conclusions:
- Coronary capillary patterns in heart failure are non-random and exhibit diminished regularity.
- Intercapillary distances increase, and capillary density decreases from healthy controls to DCM, ICM, and InfCM.
- These findings highlight distinct microvascular alterations associated with different etiologies of end-stage heart failure.
Introduction:
The goal of the present study was to compare the pattern of coronary capillaries in healthy participants and in patients with end-stage heart failure due to idiopathic dilated cardiomyopathy (DCM), ischemic cardiomyopathy (ICM), or inflammatory cardiomyopathy (InfCM).
Methods:
Capillary patterns were studied in histological sections from resected hearts from patients with DCM (n=5), ICM (n=5), or InfCM (n=5) and compared with donor hearts showing no signs of cardiac disease (n=3). Patterns were characterized by the distribution of Voronoi polygon areas, A, associated with the centers of capillary profiles, nearest-neighbor distances, d, intercapillary distances (ICD), as well as by means of the pair correlation function g(r). The coefficient of variation of A, CV, was used to characterize capillary patterns as regular, random, or clustered.
Results:
CV increased from 30.5% (control) to 33.8% (DCM), 36.6% (ICM), and to 40.3% (InfCM). d was minimal in the control group (16.5+/-4.3 microm) and increased to 18.1+/-5.2 microm in the DCM group and to 20.9+/-6.8 and 20.6+/-6.6 microm in the ICM and InfCM groups, respectively. ICD increased from 25.6+/-7.9 (control) to 28.5+/-9.2 (DCM), 34.4+/-12.2 (ICM), and 33.6+/-12.0 microm (InfCM). In all groups, g(r) was markedly different from random points; in the control and DCM group, g(r) showed a weak but distinct first maximum, characteristic for short-range order in a point pattern.
Conclusions:
Our data suggest that, for the patients studied, (1) the pattern of coronary capillaries is not purely random, (2) the regularity of the pattern diminishes from the control to DCM, ICM, and InfCM, and (3) ICD increases, whereas capillary density (CD) decreases, from control to DCM, ICM, and InfCM.
More Related Videos
Related Concept Videos
01:21Myocarditis I: Introduction
01:30Cardiomyopathy II: Dilated Cardiomyopathy
01:21Coronary Circulation
Coronary circulation begins at the base of the aorta, where two main arteries arise—the left and right coronary arteries. These arteries encircle the heart in the coronary sulcus and supply the...
01:29Cardiomyopathy IV: Restrictive Cardiomyopathy