Simpson's biplane ejection fraction (A), and two-dimensional speckle-tracking global longitudinal strain (B) in patients receiving clozapine treatment, non-clozapine treatment and in a healthy control population. *post hoc Tukey test with p<0.05; ***Post ho... Simpson's biplane ejection fraction (A), and two-dimensional speckle-tracking global longitudinal strain (B) in patients receiving clozapine treatment, non-clozapine treatment and in a healthy control population. *post hoc Tukey test with p<0.05; ***Post hoc Tukey test with p<0.001. V Chow et al. Open Heart 2014;1:e000030 ©2014 by British Cardiovascular Society