“Transgenic mice with mutations in troponin T resulting in pathogenic HCM phenotypes which displayed marked diastolic dysfunction with minimal fibrosis, were administered 0.83 mg/kg/day for 6 months. Mavacamten improved diastolic function while preserving fractional shortening.”
Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
Reviewer's view of the efficacy data
EMA: improvement of HCM phenotype in transgenic mouse supports proof of concept
“Mavacamten was able to improve HCM phenotype in a transgenic mouse, thus further lending support to the proof of concept for mavacamten as a therapy in HCM.”