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8110 Gatehouse Road, Falls Church, VA 22042

Medical Director, Cardiac Surgical Services

Alan M. Speir, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Thoracic and Cardiac Surgery
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Adult Heart Surgery
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 45

Adult Cardiac Surgeons

Ramesh Singh, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Thoracic and Cardiac Surgery, Surgery
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Adult Heart Surgery
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 20

Liam P. Ryan, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Thoracic and Cardiac Surgery, Surgery
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Adult Heart Surgery
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 18

Kathleen R. Petro, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Thoracic and Cardiac Surgery
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Adult Heart Surgery
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 27

Eric L. Sarin, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Thoracic and Cardiac Surgery, Surgical Critical Care
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Adult Heart Surgery
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 22

Alan M. Speir, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Thoracic and Cardiac Surgery
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Adult Heart Surgery
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 45

Pediatric Cardiac Surgeons

Lucas R. Collazo, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Thoracic and Cardiac Surgery, Congenital Cardiac Surgery
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Children's Heart, Children's Heart Surgery
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 31

Marcelo G. Cardarelli, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Clinical Interests: Children's Heart, Children's Heart Surgery
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 39