Prospective evaluation of patients with syncope: a population-based study

A new method of classifying prognostic comorbidity in longitudinal studies: Development and validation

Mary E. Charlson, Peter Pompei, Kathy L. Aleš et al. · Journal of Chronic Diseases · 1987 · 49.9K citations

Public Health, Biostatistics, Clinical Classification Systems +15

Evaluation and outcome of emergency room patients with transient loss of consciousness

Susan Day, E. Francis Cook, H. Harris Funkenstein et al. · The American Journal of Medicine · 1982 · 602 citations

Health Professions, Emergency Medical Services, Emergency Medicine +11

Methodology of head-up tilt testing in patients with unexplained syncope

Adam Fitzpatrick, George Theodorakis, Panos E. Vardas et al. · Journal of the American College of Cardiology · 1991 · 433 citations

Health Professions, Neurology, Physical Examination +4

Diagnosis of Pulmonary Embolism by a Decision Analysis-Based Strategy Including Clinical Probability, D-Dimer Levels, and Ultrasonography: A Management Study

Arnaud Perrier · Archives of Internal Medicine · 1996 · 260 citations

Medicine, Clinical Sciences, Internal Medicine +17

Patients With Syncope Admitted to Medical Intensive Care Units

Marc D. Silverstein · JAMA · 1982 · 254 citations

Medicine, Internal Medicine, Critical Care Medicine +2