Pulsus paradoxus greater than 20 mm Hg, tachycardia greater than 130 beats/min, and increasing dyspnea are signs of:
a. intracranial pressure.
b. pulmonary hypertension.
c. status asthmaticus.
d. tetanic contractions.
C
Status asthmaticus is a severe and prolonged asthma attack that resists the usual therapeutic ap-proaches. The patient experiences dyspnea, can only get out a few words between breaths, and has tachycardia often greater than 130 beats/min and pulsus paradoxus greater than 20 mm Hg. Pulsus paradoxus is more likely in pericardial effusion, constrictive pericarditis, and severe asthma.
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