What is the role of pulse-oximetry in the evaluation of cardiac tamponade?

Updated: Nov 28, 2018
  • Author: Chakri Yarlagadda, MD, FACC, FSCAI, FASNC, CCDS; Chief Editor: Terrence X O'Brien, MD, MS, FACC  more...
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Answer

Respiratory variability in pulse-oximetry waveform is noted in patients with pulsus paradoxus. In a small group of patients with tamponade, Stone et al noted increased respiratory variability in pulse-oximetry waveform in all patients. [21] This finding should raise the suspicion for hemodynamic compromise. In patients with atrial fibrillation, pulse-oximetry may aid in detecting the presence of pulsus paradoxus.


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