Impaired contraction in patient-derived hiPS-CMs has been reported in not only HLHS-derived hiPS-CMs [67,78] but also hiPS-CMs from family members with a pathogenic GATA4-variant causing septal defects and pulmonary stenosis [71], and hiPS-CMs from patients with pulmonary atresia with intact ventricular septum [72]. The gene discussed is GATA4; the disease is Pulmonic stenosis.