Figure 6.

Ventricular arterial properties in Fontan patients with preserved versus reduced cardiac index. As compared to those with preserved cardiac index, Fontan patients with reduced (<2.5 L/min per m²) cardiac index (A) had similar heart rate (B), but lower stroke volume index (C), and higher systemic vascular resistance (SVR) index (D) and total afterload (E). Ventricular systolic elastance (Ees) was similar at any afterload (F) indicating similar ventricular arterial coupling. Fontan patients with reduced CI had a smaller end‐diastolic volume index (EDVI) for any ejection fraction (EF; G) and lower diastolic wall strain (DWS; H), suggesting greater diastolic myocardial stiffness. ^† P value adjusted for EF. Dotted lines indicate lower limit of normal for cardiac index (A) and stroke volume index (C). bpm indicates beats per minute; CI, cardiac index; Nl, normal.