RT Journal Article SR Electronic T1 Quantitation of Post-Stress Change in Ventricular Morphology Improves Risk Stratification JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP jnumed.120.260141 DO 10.2967/jnumed.120.260141 A1 Robert J.H. Miller A1 Tali Sharir A1 Yuka Otaki A1 Heidi Gransar A1 Joanna X. Liang A1 Andrew J. Einstein A1 Mathews B. Fish A1 Terrence D. Ruddy A1 Philipp A. Kaufmann A1 Albert J. Sinusas A1 Edward J. Miller A1 Timothy M. Bateman A1 Sharmila Dorbala A1 Marcelo Di Carli A1 Balaji K. Tamarappoo A1 Damini Dey A1 Daniel S. Berman A1 Piotr J. Slomka YR 2021 UL http://jnm.snmjournals.org/content/early/2021/03/12/jnumed.120.260141.abstract AB Shape index and eccentricity index are measures of left ventricular morphology. Although both measures can be quantified with any stress imaging modality, they are not routinely evaluated during clinical interpretation. We assessed their independent associations with major adverse cardiovascular events (MACE), including measures of post-stress change in shape index and eccentricity index. Methods: Patients undergoing single photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) between 2009 and 2014 from the REFINE SPECT registry were studied. Shape index (ratio between the maximum LV diameter in short axis and ventricular length) and eccentricity index (calculated from orthogonal diameters in short axis and length) were calculated in end-diastole at stress and rest. Multivariable analysis was performed to assess independent associations with MACE (death, non-fatal myocardial infarction, unstable angina, or late revascularization). Results: In total, 14,016 patients, mean age 64.3 ± 12.2 and 8469 (60.4%) male, were included. MACE occurred in 2120 patients during a median follow-up of 4.3 years (interquartile range 3.4 – 5.7). Rest, stress, and post-stress change in shape and eccentricity indices were associated with MACE in unadjusted analyses (all p<0.001). However, in multivariable models only post-stress change in shape index (adjusted HR 1.38, p<0.001) and eccentricity index (adjusted HR 0.80, P = 0.033) remained associated with MACE. Conclusion: Two novel measures, post-stress change in shape index and eccentricity index, were independently associated with MACE and improved risk estimation. Changes in ventricular morphology have important prognostic utility and should be included in patient risk estimation following SPECT MPI.