Figure 4.
LV biopsy obtained creatine concentration and CK and CS activities. CK total activity (A), CS activity (B), total creatine concentration (C), estimated CK capacity (D) from nonhypertrophied, non–pressure-loaded hearts (NH), severe aortic stenosis with preserved (SevAS-pEF) and reduced ejection fraction (SevAS-rEF) undergoing valve replacement surgery. *Post hoc pairwise tests significant versus NHBx. †Post hoc pairwise tests significant versus SevAS-pEF. CK indicates creatine kinase; and NHBx, non–pressure-loaded heart biopsy.