Adult with pneumonia is diaphoretic, tachycardia and confused. Cardiac monitor indicates sinus tachycardia with frequent mulitfocap premature vertular beats. Arterial blood gas findings are pH 7.26, paco2 66mmHg, which u tervention is most important? Assess for apocal radial pulse deficit with vital signs, maintain patent IV catheter for antibiotic therapy, monitor reporatory rate and depth continuously, or obtain a 12 lead ecg daily