Left ventricular functional parameters by gated SPECT myocardial perfusion imaging in a Latin American country

Abstract

These data could prove helpful for the interpretation of gated SPECT MPI data in Latin America using identical protocol as used in this study.

Relationship between transient ischemic dilatation and changes in heart rate during gated SPECT acquisition in a low-risk population without perfusion defects

“…In this study, only 8 patients (2.7%) had abnormal TID ratio using a threshold of 1.22 for patients undergoing exercise and 1.36 for those undergoing pharmacologic test, based on data from the literature. In contrast, we applied a threshold of 1.20 for either test, according to published data from our own laboratory in a very low-risk population [24]. Thus, we included only those patients in whom the TID ratio was at least 1.2 and after several exclusion criteria were applied ( N = 63, 3.14%).…”

“…Angiographic data was not considered because it was only available for very few patients, since normal perfusion results discouraged invasive management in the majority of cases. Although reported reference values of TID are different according to acquisition protocols, types of stress, radiotracers, processing parameters, and patient populations [1,3,12,15,30,25], we used a threshold based on previously published data from our own institution [24].…”