Dr. Margaret M. Brennan
About Dr. Margaret M. Brennan SPECIALTY / SUBSPECIALTIES: Cardiology / General CardiologySUBSPECIALTIES : General Cardiology, Adult Congenital Heart DiseaseAFFILIATED HOSPITALS : Johns Hopkins Hospital + 1YEARS OF EXPERIENCE : 21+GENDER : Female Education & Experience Medical School & Residency Johns …