The nurse suspects cardiac tamponade in a patient who has acute pericarditis.To assess for the presence of pulsus paradoxus,the nurse should

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Pulsus paradoxus exists when there is a gap of greater than 10 mm Hg between when Korotkoff sounds can be heard during only expiration and when they can be heard throughout the respiratory cycle.The other methods described would not be useful in determining the presence of pulsus paradoxus.

The Nurse Suspects Cardiac Tamponade in a Patient Who Has