June 30, 2026 · Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology · DOI: 10.1016/j.nuclcard.2026.102797

Normal Values for <sup>13</sup>N-Ammonia PET-derived Metrics in Heart Transplant Patients

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The authors aimed to establish normal reference values for myocardial blood flow (MBF), myocardial blood flow reserve (MBFR), and left ventricular parameters in heart transplant (HT) recipients using <sup>13</sup>N-ammonia PET imaging. By evaluating 266 HT recipients and comparing results from two software programs, they found that while there was a strong relationship between metrics, the agreement was moderate to good, highlighting the importance of software-specific thresholds for assessing cardiac health in transplant patients.

Kevin J O'Gorman, Luca Bremner, Zayd Mian, Lee Yang, Mrinali Shetty, Yosef A Cohen, Megha Prasad, Hannah R Rosenblum, Matthew K Hoffman, Srilaxmi Bearelly, Kaveri A Thakoor, Charissa J Chou, Yun Joo Park, Michelle Castillo, Lynne L Johnson, Albert DeLuca, Mona Kinkhabwala, Qi Liu, Margarita Chernovolenko, Kimberly Goldner, Anthony Ciano, Nir Uriel, Kevin Clerkin, Andrew J Einstein

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