Figure 2.

Cardiac ³¹P-MRS spectrum. Participant with PCr/ATP ratio = 1.239. In black the original cardiac 31P spectrum with first order phase adjustment and in red the fit of the high energy phosphorus metabolite peaks Pi, PDE, 2,3DPG, PCr, γ-ATP, and α-ATP, at their typical resonance frequency. The resonances of PCr and γ-ATP were considered for calculation of PCr/ATP.