Charles Oprian

Outcomes 15 years after valve replacement with a mechanical versus a bioprosthetic valve: final report of the Veterans Affairs randomized trial

Karl E. Hammermeister, Gulshan K. Sethi, William G. Henderson et al. · Journal of the American College of Cardiology · 2000 · 1.1K citations

Medicine, Surgery, Cardiothoracic Surgery +14

A Comparison of Outcomes in Men 11 Years after Heart-Valve Replacement with a Mechanical Valve or Bioprosthesis

Karl E. Hammermeister, Gulshan K. Sethi, William G. Henderson et al. · New England Journal of Medicine · 1993 · 430 citations · Full text

Medicine, Cardiology, Surgery +17

Risk factors for morbidity and mortality after colectomy for colon cancer

Walter E. Longo, Katherine S. Virgo, Frank E. Johnson et al. · Diseases of the Colon & Rectum · 2000 · 422 citations

Medicine, Surgery, Gastrointestinal Oncology +12

Prognostic models of thirty-day mortality and morbidity after major pulmonary resection

David H. Harpole, Malcolm M. DeCamp, Jennifer Daley et al. · Journal of Thoracic and Cardiovascular Surgery · 1999 · 292 citations · Full text

Medicine, Perioperative Medicine, Surgery +14

Determinants of survival and left ventricular performance after mitral valve replacement. Department of Veterans Affairs Cooperative Study on Valvular Heart Disease.

Michael H. Crawford, Julianne Souchek, Charles Oprian et al. · Circulation · 1990 · 284 citations

Medicine, Cardiology, Surgery +17