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Ventricular function in Fontan (FON) patients and controls (CON). Relationship to ejection fraction. Whereas ventricular arterial coupling (Ees/Ea; A), preload recruitable stroke work (PRSW; B) and mechanical (C) and energetic (D) efficiency all decrease with decreasing EF in Fontan and control patients, all these indices are lower in Fontan patients versus controls across the overlapping range of EFs. Ea indicates arterial elastance; Ees, end‐systolic elastance.
