Laura M. Mercer-Rosa, MD, MSCE

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Laura M Mercer-Rosa, MD, MSCE, is a board-certified attending cardiologist in the Cardiac Center at Children’s Hospital of Philadelphia.

Locations: Main Hospital

Phone: 215-590-4040


As a pediatric cardiologist, Laura Mercer-Rosa, MD, MSCE, focuses on providing the best possible care for her own patients at CHOP. As a clinical epidemiologist, she expands her scope, studying the outcomes of treatments for hundreds of children at hospitals far and wide.

In both cases, it’s all about making lives better for children with heart disease.

Dr. Mercer is interested in congenital heart disease, particularly tetralogy of Fallot, a complex condition involving four distinct defects of the heart and nearby blood vessels.

“Tetralogy of Fallot is a disease that requires surgery and lifelong follow up,” says Dr. Mercer-Rosa,“ and I appreciate being able to see how patients recover from surgery and to have the opportunity to follow them as they grow up.”

Cases of tetralogy of Fallot vary a great deal in severity and in configuration, and CHOP’s Cardiac Center is adept at diagnosing and treating each case individually. Dr. Mercer-Rosa’s work as an echocardiographer produces images that allow her and her colleagues to discern the specific contours of each patient’s heart.

“I am happy to see that we are personalizing the care for children with congenital heart defects,” says Dr. Mercer-Rosa. “There is really no one-type-fits-all surgical repair, and we are understanding more and more the differences that exist from patient to patient. The better we understand these differences, the more optimal care we will be able to provide.”

Dr. Mercer-Rosa is an active researcher, with scores of publications. A particular focus is outcomes in tetralogy of Fallot, both early and late. She also has an active research interest in right ventricular function in different disease processes.

As patients or research subjects, the kids come first for Dr. Mercer-Rosa. “I want families to know (and feel) that we care deeply about them and that we strive to provide them with the best possible care,” she says.

Education and Training

Medical School

MD - Universidade Federal do Parana, Brazil


Pediatrics - Hospital de Clinicas, Curitiba, Brazil
Pediatrics - Miami Children's Hospital, Miami, FL


Pediatric Cardiology - Instituto do Coracao, Sao Paulo, Brazil
Pediatric Cardiology - The Children's Hospital of Philadelphia, Philadelphia, PA

Board Certification

Pediatric Cardiology

Titles and Academic Titles

Attending Cardiologist

Assistant Professor in Pediatrics, Perelman School of Medicine at the University of Pennsylvania

Departments and Services




Mercer-Rosa L., Fedec A., Gruber P. and Seliem M.: Cor triatriatum sinister with and without left ventricular inflow obstruction: visualization of the entire supravalvular membrane by real-time three-dimensional echocardiography. Impact on clinical management of individual patient. Congenit Heart Dis. 2006 Nov;1(6):335-9.

Mercer-Rosa L, Seliem MA, Fedec A, Rome J, Rychik J and Gaynor JW: Illustration of the additional value of real-time 3-dimensional echocardiography to conventional transthoracic and transesophageal 2-dimensional echocardiography in imaging muscular ventricular septal defects: does this have any impact on individual patient treatment? J Am Soc Echocardiogr. 2006 Dec;19(12):1511-9.

Lopez L, Mercer-Rosa L, Zahn EM, Altman NR, Dubois R, Burke RP: The "hinge-twist" technique for anomalous origin of the left coronary artery. Ann Thorac Surg. 2006 Aug;82(2):e19-21.



Mercer-Rosa L, Malreany M. Hypoplastic Left Heart Syndrome. In: The 5-minute Pediatric Consult. Schwartz MW, editor. 5th ed. Philadelphia: Lippincott & Williams; 2008. p 434-435.