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Intraindividual variability of cardiac allograft vasculopathy as assessed by intravascular ultrasound
V Klauss1, H Mudra, P Uberfuhr
1Department of Internal Medicine, Klinikum Innenstadt, University of Munich, Germany.
Insights
Cardiac allograft vasculopathy (CAV) shows significant variability between coronary arteries and segments within individual heart transplant patients. Intravascular ultrasound revealed differences in CAV severity across various coronary arteries and locations, highlighting intraindividual differences.
Area of Science:
- Cardiology
- Transplant Medicine
- Medical Imaging
Background:
- Cardiac allograft vasculopathy (CAV) is a major cause of late graft loss after heart transplantation.
- Understanding the distribution and variability of CAV within individual patients is crucial for effective management.
Purpose of the Study:
- To investigate the intraindividual extent and variability of cardiac allograft vasculopathy (CAV) in heart transplant recipients.
- To compare the severity of CAV across different coronary arteries and segments within the same patient.
Main Methods:
- A quantitative intravascular ultrasound (IVUS) study was performed on 43 heart transplant recipients.
- Analysis included 216 segments in 71 coronary arteries, assessing intimal index and IVUS grade.
- Comparison of CAV involvement between different arteries (left circumflex, left anterior descending, right coronary, left main) and between proximal and distal segments.
Main Results:
- Significant variability in CAV involvement was observed between different coronary arteries and segments within individual patients.
- Segments of the left anterior descending, right coronary, and left main arteries showed more pronounced CAV than the left circumflex artery.
- Proximal segments were more affected by CAV than distal segments in 64% of analyzed arteries.
- Patients with multiple arteries studied showed a greater difference in CAV severity compared to those with only one artery studied.
Conclusions:
- This in vivo IVUS study demonstrates substantial intraindividual variability in CAV involvement.
- The findings underscore the importance of comprehensive assessment of all major coronary arteries and segments for accurate CAV staging.
Abstract:
To investigate the intraindividual extent of cardiac allograft vasculopathy (CAV), 43 heart transplant recipients were studied 0.5 to 108 months after transplantation with intravascular ultrasound (IVUS). In these patients, 216 segments in 71 coronary arteries were analyzed quantitatively: 26 of 43 patients (60%) underwent study of > or = 2 arteries, and 80 of 216 segments (37%) were located distally (5.0 +/- 2.4 segments/patient were analyzed). Intimal index and mean IVUS grade were less pronounced in segments of the left circumflex artery (9 +/- 14 and 2.1 +/- 1.6) than in segments of the left anterior descending artery (21 +/- 19 and 3.3 +/- 2.1), right coronary artery (22 +/- 19 and 3.5 +/- 2.1), and left main coronary artery (16 +/- 4 and 3.3 +/- 1.9) (p < 0.01 and p < 0.001, respectively). In 21 of 43 patients, both the left anterior descending and left circumflex arteries were studied: Higher values in the intimal index were seen in the left anterior descending artery (20 +/- 14 vs 9 +/- 13, p < 0.005). When distal and proximal segments of the same vessel were compared, CAV was found in 44 of 56 arteries and the proximal segments were more affected in 64%. The difference between minimal and maximal IVUS grade in patients with only 1 artery studied (n = 17) was 1.7 +/- 1.8 compared with 3.1 +/- 1.7 in patients with > or = 2 arteries analyzed (n = 26). This in vivo study with IVUS shows a large variability of CAV involvement between different coronary arteries and segments in 1 patient.(ABSTRACT TRUNCATED AT 250 WORDS)