KIT and myocardial infarction: Better preservation of myocardial contractility in dn-c-kit-Tg mice was also evident from another load-independent index: LV dP/dtmax normalized to EDV9, which was 1.8–fold higher in dn-c-kit-Tg relative to NTL hearts, both in sham (p = 0.008) and in post-MI groups (p = 0.02, Fig. 4c).