JACC Imaging -- Kobayashi et al. 1 (6): 718 Figure IG1

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Figure 1 Relation Between Baseline LVEF and ${Delta}$ LV dP/dt_max

We calculated the percentage change in maximal first derivative of left ventricular pressure (LV dP/dt_max [ ${Delta}$ LV dP/dt_max]) induced by intravenous infusion of dobutamine (10 µg kg^–1 min^–1). Patients were classified into 3 groups: group I (orange with black circles, n = 18), ${Delta}$ LV dP/dt_max >100% (left ventricular ejection fraction [LVEF] >25%); group IIa (orange circles, n = 17), ${Delta}$ LV dP/dt_max $≤$ 100% and LVEF >25%; and group IIb (brown triangles, n = 11), ${Delta}$ LV dP/dt_max $≤$ 100% and LVEF $≤$ 25%.