Feasibility and diagnostic accuracy of exercise treadmill nitrogen-13 ammonia PET myocardial perfusion imaging of obese patients
Language English Country United States Media print-electronic
Document type Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't
Grant support
UL1 TR000135
NCATS NIH HHS - United States
PubMed
25777780
DOI
10.1007/s12350-015-0073-z
PII: S1071-3581(23)07186-6
Knihovny.cz E-resources
- Keywords
- Coronary artery disease, exercise stress testing, myocardial perfusion imaging, obesity, positron emission tomography,
- MeSH
- Ammonia MeSH
- Middle Aged MeSH
- Humans MeSH
- Coronary Artery Disease complications diagnostic imaging MeSH
- Obesity complications diagnostic imaging MeSH
- Positron-Emission Tomography methods MeSH
- Radiopharmaceuticals MeSH
- Nitrogen Radioisotopes * MeSH
- Reproducibility of Results MeSH
- Aged MeSH
- Sensitivity and Specificity MeSH
- Feasibility Studies MeSH
- Exercise Test MeSH
- Myocardial Perfusion Imaging methods MeSH
- Check Tag
- Middle Aged MeSH
- Humans MeSH
- Male MeSH
- Aged MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Research Support, N.I.H., Extramural MeSH
- Names of Substances
- Ammonia MeSH
- Radiopharmaceuticals MeSH
- Nitrogen Radioisotopes * MeSH
BACKGROUND: Treadmill exercise nitrogen-13 ((13)N)-ammonia positron emission tomography (PET) has logistical challenges and limited literature. We aimed to assess its feasibility, image quality, and diagnostic accuracy in obese and nonobese patients. METHODS AND RESULTS: Between 2009 and 2012, 10,804 patients were referred for myocardial perfusion imaging, including 300 for treadmill PET, of whom 265 were included in this study. Treadmill testing and PET were performed using standard procedures. Image quality, perfusion, and summed stress score (SSS) were assessed. Invasive coronary angiography was performed within 90 days of PET in 43 patients. Mean ± SD body mass index (BMI) was 35.7 ± 7.7 kg/m(2) (range 19.5-63.5 kg/m(2)). Feasibility of treadmill (13)N-ammonia PET was 100%. Exercise duration was less for obese patients than nonobese patients (P < .001). Image quality was rated good for 96.9% of obese and 100% of nonobese patients. For all patients, sensitivity was 86.4% and specificity was 74.4%. Diagnostic accuracy did not change significantly with increasing BMI. SSS remained significant in predicting angiographic coronary artery disease after adjustment for age, sex, and Duke treadmill score. CONCLUSIONS: Treadmill (13)N-ammonia PET is highly feasible, yields good image quality, and has moderately high diagnostic accuracy in a small subset of obese and nonobese patients who are deemed able to perform treadmill exercise.
Department of Radiology Mayo Clinic 200 1st St SW Rochester MN 55905 USA
Division of Cardiovascular Diseases Mayo Clinic 200 1st St SW Rochester MN 55905 USA
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