Noninvasive Assessment of Coronary Vasodilation in High-Risk Patients
Author Information
Author(s): Nguyen Patricia K, Meyer Craig, Engvall Jan, Yang Phillip, McConnell Michael V
Primary Institution: Stanford University
Hypothesis
Impaired coronary vasodilation to NTG can be demonstrated noninvasively in asymptomatic patients at increased risk for coronary artery disease.
Conclusion
Noninvasive coronary CMR demonstrates impairment of coronary vasodilation to NTG in high-risk patients with DM and ESRD.
Supporting Evidence
- Patients with DM and ESRD had impaired coronary vasodilation to NTG compared to age-matched controls.
- This impairment remained significant for both ESRD and DM patients when analyzed separately.
- 80% of ESRD patients and 38% of DM patients fell below the 15% threshold for coronary vasodilation.
Takeaway
Doctors used a special scan to see how well blood vessels open in patients at risk for heart problems. They found that some patients didn't open their blood vessels as well as healthy people.
Methodology
High-resolution coronary CMR was used to measure coronary vasodilation in 46 asymptomatic subjects, including high-risk patients and age-matched controls.
Potential Biases
Significant differences in demographics between patient and control groups may introduce bias.
Limitations
The study only evaluated endothelium-independent vasodilation and had a small sample size, which may affect the generalizability of the findings.
Participant Demographics
13 high-risk patients (8 with diabetes mellitus, 5 with end stage renal disease) and 33 age-matched controls.
Statistical Information
P-Value
p = 0.002
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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