Faget's Sign & Liebermeister's Rule Pulse-Temperature Dissociation EVERY 1 F RISE IN TEMPERATURE -> HR INCREASES 8-10 BPM INFECTIOUS CAUSES • Legionella • Psittacosis • Q Fever • Typhoid Fever • Typhus • Babesiosis • Malaria • Leptospirosis • Yellow Fever • Viral Hemorrhagic Fevers • Rocky Mountain Spotted • Fever OTHER CAUSES • Beta Blockers • CNS Lesions • Lymphomas • Factitious Fever • Drug Fever CLINICAL UTILITY 1. Legionella 2. Chlamydia 3. Typhoid Fever (S. typhi) 4. Dengue Fever NOTE: There is limited predictive value in pulse-temperature dissociation and the most likely infection. However! There are specific cases where it can help hone your differential. #Fagets #Sign #Pulse #Temperature #Dissociation #diagnosis #differential #causes
