RT Journal Article SR Electronic T1 Krypton-81m Imaging of the Right Ventricle JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 33 OP 36 VO 26 IS 1 A1 Matthew Horn A1 Kathryn Witztum A1 Connie Neveu A1 Gordon Perkins A1 Brian Walsh YR 1985 UL http://jnm.snmjournals.org/content/26/1/33.abstract AB We report the development of a method for obtaining right-ventricular radionuclide angiograms using continuous peripheral intravenous infusion of the ultra-short-lived nuclide krypton-81m. This tracer has a half-life of 13 sec, emits a single 190-keV photon, and is extremely insoluble. During infusion into a peripheral vein, Kr-81m achieves stable count rates over the right heart, and it is essentially completely cleared by the lungs during its initial pulmonary transit. Thus no interfering activity is present in the systemic circulation. Initial studies provide excellent data on right-heart anatomy and function.