Two decades after the arterial switch operation: stable right ventricular function but reduced exercise capacity.

PBFM showed a trend toward a decrease in patients with RV pressure overload between mid-term and long-term follow-up, while it remained stable in those without RV pressure overload (RV pressure overload: 16 ± 13% vs. 10 ± 7%, p = 0.067; no RV pressure overload: 6 ± 5% vs. 6 ± 5%, p = 0.985) ( supplemental Table 2 ).

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