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Figure 7 (Left panel) Correlation between total myocardial creatine (CR) concentrations and left ventricular ejection fraction (EF) in 18 patients with either DCM (solid circles) or HCM (open squares). There was a positive correlation (r = 0.73, p = 0.0006) between the myocardial CR concentrations and left ventricular EF. (Right panel) Correlation between myocardial CR concentrations and plasma B-type natriuretic peptide (BNP) levels in 18 patients with either DCM or HCM. There was a negative correlation (r = –0.54, p = 0.022) between the myocardial CR concentrations and plasma BNP levels. Other abbreviations defined in Figures 3 and 4.