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Compared to patients with normal perfusion (<5% stress perfusion defect), the hazard ratio for an adverse cardiac event during a 4-yr follow-up period was 2.7 for patients with 5% to 10% perfusion defect; 3.3 for patients with 10% to 20% perfusion defect, and 4.1 for patients with a greater than 20% perfusion defect on regadenoson SPECT nuclear imaging. J Nucl Cardiol. 2015 Feb 14.a    (retrieved Feb, 2015). There are currently 1090 pearls in the database. While every attempt has been made to ensure accuracy, mistakes can and do occur. Use databank at your own risk. All pearls © 2024 by the Internet Medical Association. Click Here to view more medical pearls.