KCNH2 and cyclic hematopoiesis: The fast deactivation time constants were not different between the control group (31.7±5.8ms) and the CH group (32.5±5.0ms), whereas, slow deactivation time constants were significantly shortened in CH group (106.2±14.8ms) compared to the controls (268±29.6ms), suggesting CH not only reduced hERG current amplitudes but also altered the deactivation kinetics of hERG currents.