A Phase 4, Open-Label, Non-Randomized, Multicenter Study to Evaluate Efficacy (and Safety) of Intravenous Administration of Optison for Contrast-Enhanced Echocardiography in Pediatric Patients. - Sabati A; Wang S; Shivaram P; Hawley J; Thompson D; Erenberg F; Kutty S; Kulkarni A; Doan TT; Robinson JD (Pediatric cardiology, 2026)