Pulsus paradoxus may be seen on intra-arterial blood pressure monitoring when
a. there is a decrease of more than 10 mm Hg in the arterial waveform before inhalation.
b. there is a single, nonperfused beat.
c. the waveform demonstrates tall, tented T waves.
d. the pulse pressure is greater than 20 mm Hg on exhalation.
A
Pulsus paradoxus is a decrease of more than 10 mm Hg in the arterial waveform that occurs during inhalation. It is caused by a fall in CO as a result of increased negative intrathoracic pressure during inhalation.
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