6' 5" Male with Right Coronary Artery Ischemia
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Height: 6' 5”
Weight: 235 pounds.
Tracer dose: 31.2 mCi at peak treadmill stress
Timing: Tracer was injected at peak treadmill exercise. After a 57 minute delay, SPECT images were obtained on a conventional, dual-detector, dedicated cardiac SPECT system. Approximately one hour later, images were obtained on the CardiArc® scanner. No additional tracer was administered between the two scans.
Scan findings: (stress images):
Dual-detector system with high-resolution collimation (LEHR): Large sized inferobasal defect. Small apical defect.
Catheterization findings: Isolated, high-grade, proximal stenosis of the PDA (posterior descending artery).
Discussion: The proximal nature of the stenosis and the extensive ECG findings are more consistent with the CardiArc® images. The higher lesion contrast of CardiArc® may make it easier to define the full extent of perfusion abnormalities.