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The relationship between total left ventricular myocardial oxygen consumption (MVO2) and external work (EW) at rest and during dobutamine infusion in heart failure with preserved ejection fraction (HFpEF; red) and Controls (black) (left panel) and in HFpEF patients with left ventricular hypertrophy (HFpEF+LVH, blue) and Controls (black) (right panel). * in both Controls and HFpEF, †where slope not different
