Coronary Small Vessel Disease and Cardiac Magnetic Resonance Imaging
Author Information
Author(s): Guenter Pilz, Markus Klos, Eman Ali, Berthold Hoefling, Roland Scheck, Peter Bernhardt
Primary Institution: Department of Cardiology, Clinic Agatharied, Academic Teaching, Hospital of the University of Munich, Germany
Hypothesis
Can cardiac magnetic resonance imaging (CMR) detect subendocardial ischemia in patients with small vessel disease who show no significant stenosis on coronary angiography?
Conclusion
Patients with CMR detected subendocardial ischemia have prolonged coronary blood flow, indicating microvascular impairment.
Supporting Evidence
- 22 patients showed subendocardial ischemia on CMR.
- Significant correlation found between CMR perfusion deficit and coronary luminal narrowing.
- Study patients had more hypertension and diabetes compared to control groups.
Takeaway
Doctors used a special heart scan to find problems in small blood vessels in the heart, even when other tests looked normal.
Methodology
Patients underwent adenosine-stress CMR followed by coronary angiography to evaluate perfusion deficits and coronary blood flow.
Potential Biases
Potential referral bias due to the selection of control groups.
Limitations
The study did not directly measure coronary flow velocity and used corrected TIMI frame count as a surrogate.
Participant Demographics
Mean age was 66 years, with 64% male and 36% female participants.
Statistical Information
P-Value
p<0.0001
Confidence Interval
[0.72–0.95]
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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