For 13-year-old Chelsea Polanco, it took a unique collaboration between a pediatric cardiac surgeon and a cardiac expert on the adult side to save her heart—and her life.

When Chelsea came to Mount Sinai Kravis Children’s Hospital with signs of mitral valve dysfunction, including fatigue and bloating, she was admitted to the pediatric cardiac intensive care unit within the hospital’s Children’s Heart Center. After close observation, the team at the Children’s Heart Center, an alliance between Mount Sinai and Children’s Hospital of Philadelphia, concluded that her leaking mitral valve was causing fluid to fill her lungs and belly. Her condition was not improving.

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