Liebermeister's Rule and Faget's Sign: Useful clinical guides in the wilderness environment

For every 1 degree Celcius increase in body temperature, the heart rate increases by approximately 10 beats per minute (Liebermeister's Rule), except in situations where there is a relative bradycardia in a patient with a fever (Faget's Sign). This occurs in:

• Yellow fever
• Typhoid
• Tularaemia
• Brucellosis
• Colorado tick fever
• Legionella pneumonia
• Mycoplasma pneumonia
• Drug fever (Beta blockers)(Beta-Faget Sign)