Management of New-Onset Tachycardia and Fever in PACU

Immediate Assessment and Stabilization

The American Society of Anesthesiologists recommends assessing for hemodynamic instability, including altered mental status, hypotension, signs of shock, or acute heart failure, in patients with new-onset tachycardia and fever in the PACU 1, 2
The American Heart Association suggests attaching continuous cardiac monitoring and obtaining 12-lead ECG if the patient is stable 1, 2
The American College of Cardiology recommends establishing or verifying IV access and checking oxygen saturation, providing supplemental oxygen if needed 1, 2
The Society of Critical Care Medicine advises obtaining vital signs, including blood pressure 1

The American Society of Anesthesiologists identifies malignant hyperthermia as a critical differential diagnosis given the combination of tachycardia and fever in the immediate postoperative period 3, 4
The Infectious Diseases Society of America recommends evaluating for sepsis/infection and obtaining blood cultures, initiating empiric antibiotics if clinically indicated 5, 3
The American College of Surgeons suggests checking for hemorrhage/hypovolemia by assessing surgical drains and bleeding 3, 4
The American Heart Association recommends considering myocardial ischemia and obtaining cardiac enzymes if clinically appropriate 6

The American College of Cardiology advises preparing for immediate synchronized cardioversion if tachycardia is causing cardiovascular compromise in hemodynamically unstable patients 1, 2
The American Society of Anesthesiologists recommends notifying the anesthesiologist immediately and considering transfer to ICU if necessary 3, 4, 7
The Society of Critical Care Medicine suggests that patients who are hemodynamically stable should have their temperature managed, with fever prevention being reasonable as fever after procedures is associated with poor outcomes 8

The American Heart Association warns against normalizing heart rate in compensatory tachycardia where cardiac output depends on the rapid rate (e.g., hypovolemia, pain, hypoxia) 1, 2
The American Society of Anesthesiologists advises against discharging patients from PACU until the cardiovascular system is stable, with no unexplained cardiac irregularity, and temperature is within acceptable limits 3
The American College of Cardiology recommends against attributing all tachycardia to fever alone, as the relationship between pulse and fever deviates from expected norms during pharmacological antipyresis 1, 2

The American Society of Anesthesiologists recommends that patients be observed on a one-to-one basis until they have regained airway control, respiratory, and cardiovascular stability 4, 7
The Society of Critical Care Medicine advises monitoring minimum parameters, including heart rate and rhythm, blood pressure, oxygen saturation, core temperature, and level of consciousness 3, 4