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Published on: April 13, 2015
Coronary volume to left ventricular mass ratio in patients with diabetes mellitus
Jurrien H Kuneman1, Mohammed El Mahdiui1, Alexander R van Rosendael1
1Department of Cardiology, Leiden University Medical Center, Leiden, the Netherlands.
Insights
Diabetic patients have a significantly lower coronary volume to left ventricular mass (V/M) ratio, indicating potential vascular imbalance. This finding persists even when accounting for coronary artery disease severity, suggesting diabetes impacts coronary vasculature independently.
Area of Science:
- Cardiology
- Diabetology
- Medical Imaging
Background:
- Diabetes mellitus is a significant risk factor for coronary artery disease (CAD).
- The coronary volume to left ventricular mass (V/M) ratio is an emerging parameter assessing the balance between coronary vasculature and myocardial mass.
- Understanding V/M ratio in diabetic patients is crucial for evaluating CAD risk.
Purpose of the Study:
- To investigate the V/M ratio derived from coronary computed tomography angiography (CCTA) in patients with diabetes.
- To compare the V/M ratio between diabetic and non-diabetic individuals.
Main Methods:
- Utilized data from the ADVANCE registry, including patients with suspected CAD and known diabetic status.
- Analyzed coronary artery volume and left ventricular myocardial mass from CCTA.
- Calculated and compared the V/M ratio between diabetic and non-diabetic patient groups.
Main Results:
- Patients with diabetes had a significantly lower coronary volume (2850 mm³ vs. 3040 mm³) but comparable myocardial mass (122 g vs. 122 g) compared to non-diabetics.
- The V/M ratio was significantly lower in diabetic patients (23.9 mm³/g vs. 25.7 mm³/g).
- This reduction in V/M ratio was observed in both obstructive and non-obstructive CAD subgroups among diabetic patients.
Conclusions:
- Diabetic patients exhibit a significantly reduced V/M ratio compared to non-diabetic individuals.
- The lower V/M ratio in diabetes is evident even after adjusting for obstructive coronary stenosis.
- Further research is warranted to determine the clinical significance of this reduced V/M ratio in diabetic patients.
Background:
Diabetes mellitus is a major risk factor for coronary artery disease (CAD) and may provoke structural and functional changes in coronary vasculature. The coronary volume to left ventricular mass (V/M) ratio is a new anatomical parameter capable of revealing a potential physiological imbalance between coronary vasculature and myocardial mass. The aim of this study was to examine the V/M derived from coronary computed tomography angiography (CCTA) in patients with diabetes.
Methods:
Patients with clinically suspected CAD enrolled in the ADVANCE (Assessing Diagnostic Value of Non-invasive FFRCT in Coronary Care) registry and known diabetic status were included. Coronary artery volume and left ventricular myocardial mass were analyzed from CCTA and the V/M ratio was calculated and compared between patients with and without diabetes.
Results:
Of the 3053 patients (age 66 ± 10 years; 66% male) with known diabetic status, diabetes was present in 21.9%. Coronary volume was lower in patients with diabetes compared to those without diabetes (2850 ± 940 mm3 vs. 3040 ± 970 mm3, p < 0.0001), whereas the myocardial mass was comparable between the 2 groups (122 ± 33 g vs. 122 ± 32 g, p = 0.70). The V/M ratio was significantly lower in patients with diabetes (23.9 ± 6.8 mm3/g vs. 25.7 ± 7.5 mm3/g, p < 0.0001). Among subjects with obstructive CAD (n = 2191, 24.0% diabetics) and non-obstructive CAD (16.7% diabetics), the V/M ratio was significantly lower in patients with diabetes compared to those without (23.4 ± 6.7 mm3/g vs. 25.0 ± 7.3 mm3/g, p < 0.0001 and 25.6 ± 6.9 mm3/g vs. 27.3 ± 7.6 mm3/g, respectively, p = 0.006).
Conclusion:
The V/M ratio was significantly lower in patients with diabetes compared to non-diabetics, even after correcting for obstructive coronary stenosis. The clinical value of the reduced V/M ratio in diabetic patients needs further investigation.
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