Dr. Rachel Marcus, MD

Dr. Rachel Marcus, MD

Dr. Rachel Marcus, MD

Languages: English
Phone: 410-554-2330
Fax: 410-554-2333

Contact this Provider:

  • Cardiology
Conditions I Treat
  • abnormal electrocardiogram (ekg)
  • abnormal stress test
  • acute bacterial endocarditis
  • alcoholic cardiomyopathy
  • amyloidosis
  • Show All
Procedures I Perform
  • cardiac risk assessment
  • cardiopulmonary exercise testing
  • cardiovascular care
  • dobutamine stress test
  • electrocardiogram (ekg)
  • Show All
About the Provider

Rachel Marcus, MD, is a board-certified cardiologist at MedStar Heart & Vascular Institute, and the Interim Director of the Echo Labs at MedStar Union Memorial and MedStar Good Samaritan Hospitals. Her practice focuses on the use of echocardiogram procedures like transesophageal echocardiography (TEE) and transthoracic echocardiography (TTE) for the diagnosis of cardiovascular conditions such as coronary artery disease, valvular heart disease, congestive heart failure. She is a structural echocardiographer who helps guide the non-surgical valve repair and replacement procedures at MedStar Union Memorial Hospital. Through her work as the Medical Director of the non-profit Latin American Society of Chagas she has become an internationally recognized expert in Chagas disease, and provides consultation for both doctors and patients who have questions about this disease.

After receiving her medical degree from Stanford University School of Medicine, Dr. Marcus completed an internal medicine residency at Brigham and Women's Hospital in Boston. She then went on to complete an internal medicine residency and a cardiovascular medicine fellowship at the Stanford University Medical Center.

Dr. Marcus is fluent in Spanish and Portuguese.

Philosophy of Care
"I strive to provide the best quality of care to all of my patients, including them as a partner in the decisionmaking process."

  • Fellowship Program: Stanford University School of Medicine (2001)
  • Residency Program: Stanford University School of Medicine (1997)
  • Residency Program: Brigham and Women's Hospital (1996)
  • Medical School: Stanford University School of Medicine (1994)
  • Board Certification: American Board of Internal Medicine, Cardiovascular Disease

Marcus, R., Atwood, E. Atrial Fibrillation and Anticoagulation. Advances in Internal Medicine, Vol. 44, Chapter 9, 1999 Mosby.

Do, D., Marcus, R., Froelicher, VF., et al. Predicting Severe Angiographic Coronary Artery Disease Using Computerization of Clinical and Exercise Test Data. Chest 1998 114:1437–45.

Vagelos, R., Marcus, R., Atwood, JE. Signs, Symptoms, and Laboratory Abnormalities in Cardiovascular Disease. Hospital Medicine, Chapter 24 April 2000, Lippincott Press.

Prakash, M., Myers, J., Froelicher, VF., Marcus, R., et al. Diagnostic Exercise Tests on 4000 Consecutive Men. Am Heart J. 2001 142(1):127-35.

Prakash, M., Myers, J., Froelicher, VF., Marcus, R., et al. Clinical and Exercise Test Predictors of All-Cause Mortality: Results from >6000 Consecutive Referred Male Patients. Chest 2001 120(3):1003-13.

Shetler K., Marcus, R., Froelicher, VF., et al. Heart Rate Recovery: Validation and Methodologic Issues. J Am Coll Cardiol. 2001 Dec; 38(7):1980-7.

Spin, JM., Prakash, M., Froelicher, VF., Partington, S., Marcus, R., et al. The Prognostic Value of Exercise Testing in Elderly Men. Am J Med. 2002 Apr. 15; 112(6):453-9.

Marcus RR., Kalisetti, D., Raxwal, V., et al. Early Repolarization in Spinal Cord Injury: Prevalence and Clinical Significance. J. Spinal Cord Med. 2002 Spring 25(1):33-38.

Prakash M, Raxwal V, Froelicher VF, Kalisetti D, Vieira A, O'Mara G, Marcus R, et al. Electrocardiographic Findings in Patients With Chronic Spinal Cord Injury. I Am J Phys Med Rehabil. 2002 Aug;81(8):601-8

Kolasa, MW., Lee, JC., Atwood, JE., Marcus, R., Eckert, RE,. Relation of QTc Duration Heterogeneity to Mortality Following Orthotopic Heart Transplantation. Am J Cardiol. 2005 Feb 1;95(3):431-2.

Perez, MV., Dewey, FE., Marcus, R., Ashley, EA., et al. Electrocardiographic Predictors of Atrial Fibrillation. Am Heart J. 2009 Oct; 158(4):622-8

Kaplinski M, Jois M, Galson-Cardenas G, et al. Sustained Domestic Vector Exposure Is Associated With Increased Chagas Cardiomyopathy Risk but Decreased Parasitemia and Congenital Transmission Risk Among Young Women in Bolivia. Clin Infect Dis. (2015) 61 (6): 918-926.

Fu, K, Zamudio, R, et al. Association of caspase-1 Polymorphisms with Chagas Cardiomyopathy among individuals in Santa Cruz, Bolivia. Rev Soc Bras Med Trop 50(4):516-523, July-Aug 2017.

Acquatella, H, Asch F, et al. Recommendations for Multimodality Cardiac Imaging in Patients with Chagas Disease: A Report from the American Society of Echocardiography in Collaboration with the InterAmerican Association of Echocardiography (ECOSIAC) and the Cardiovascular Imaging Department of the Brazilian Society of Cardiology (DIC-SBC). JASE January 2018 31(1): 3-25.

Castro, Y and Marcus, R. Epidemiology of Chagas Disease in the USA: High Risk Patient Populations for Screening. Curr. Trop. Med. Reports 12 Jan 2019

Marcus RR. Chagas Disease: It’s Not the Zebra You Think It Is. https://www.acc.org. April 9, 2019.

Echeverria, L, Marcus, R, Novick, G et al. WHF IASC Roadmap on Chagas Disease. Global Heart, 15(1), p.26

Marcus RR. A Latin American Immigrant With Cardiac Arrest. https://www.acc.org. Apr 14, 2020. 

Marcus RR. Poll: Chagas Disease in the United States. https://www.acc.org. Apr 14, 2020.

Castro-Sesquen, Y, Saldana, A, Patino Nava, D, et al. Use of a Latent Class Analysis in the diagnosis of chronic Chagas disease in the Washington Metropolitan Area. Clin Infect Dis. 2020 Aug 7:ciaa1101

Wheelock, A Sandhu S, Loskill A et al. Testing for Chagas disease in an at-risk population. J Card Fail. 2020 Sep 6:S1071-9164.

Echeverria L, Rojas, L Rueda Ochoa O, et al. Circulating Trypanosoma cruzi load and major cardiovascular outcomes in patients with chronic Chagas cardiomyopathy: a prospective cohort study. Trop Med Int Health. 2020 Sep 10.

Zaidel, E, Forsyth C, Novick G, Marcus R, et al. Covid-19: implications for people with Chagas disease. Global Heart 2020;15(1):69.

Shehadeh, M, Barac, A, Marcus, R. Clinical Presentations of Chagas Cardiomyopathy. Case Rep Cardiol. 2020 Nov 3;2020:8884910


Prevalence of Chagas Disease in Bolivian Immigrants to North America, Marcus, R, and Sanchez, J. ASTMH annual meeting 2013.

Online Features

Dr. Marcus is one of seven physicans that helped save the life of Steven Jones, the husband of Dr. Sandra Swain.

Practice Locations
Member of Medical Staff