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Prominent Right Ventricular Tracer Uptake: A Harbinger of Multivessel Coronary Artery Disease
1Division of Cardiovascular Medicine, John H. Stroger Hospital of Cook County, Chicago, Illinois.
Insights
Accurate interpretation of myocardial perfusion imaging, focusing on right ventricular uptake and transient ischemic dilation, is crucial for diagnosing severe coronary artery disease (CAD). This case demonstrates how these SPECT findings led to timely intervention and improved patient outcomes.
Area of Science:
- Cardiology
- Nuclear Medicine
- Radiology
Background:
- Atypical chest pain in patients with cardiovascular risk factors necessitates thorough diagnostic evaluation.
- Pharmacologic stress myocardial perfusion imaging is a key tool for assessing coronary artery disease (CAD).
Purpose of the Study:
- To highlight the diagnostic significance of specific findings on technetium-99m sestamibi SPECT myocardial perfusion imaging.
- To emphasize the importance of meticulous interpretation for identifying severe CAD.
Main Methods:
- A 65-year-old woman with cardiovascular risk factors underwent a 1-day pharmacologic stress myocardial perfusion test using 99mTc sestamibi.
- SPECT images were meticulously reviewed, noting right ventricular uptake and transient ischemic dilation.
- Findings were confirmed with cardiac catheterization and coronary artery bypass graft surgery.
Main Results:
- Initial interpretation suggested ischemia, but detailed analysis revealed findings indicative of significant 3-vessel CAD.
- Increased right ventricular uptake and left ventricular chamber dilation at stress were key indicators.
- Cardiac catheterization confirmed severe 3-vessel disease, including left main CAD.
Conclusions:
- Meticulous SPECT interpretation, including assessment of right ventricular uptake and transient ischemic dilation, is vital for diagnosing severe CAD.
- These imaging findings can lead to timely surgical intervention and improved cardiovascular outcomes.
Abstract:
A 65-y-old woman with multiple cardiovascular risk factors presented with atypical chest pain, prompting a 1-d pharmacologic stress myocardial perfusion test using 99mTc sestamibi. Initial interpretation suggested ischemia, but closer inspection revealed increased right ventricular uptake and increased left ventricular chamber size at stress, indicative of significant 3-vessel coronary artery disease (CAD). These findings were confirmed by cardiac catheterization, showing 3-vessel disease, including significant left main CAD. The patient underwent coronary artery bypass graft surgery. This case highlights the importance of meticulous SPECT image interpretation, particularly focusing on right ventricular uptake and transient ischemic dilation, to accurately diagnose severe CAD and improve cardiovascular outcomes.
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