[Solved]: 60 minutes after patient is extubated, an arterial…

60 minutes after patient is extubated, an arterial blood gas sample is drawn. The results are pH is 7.20, CO2 is 60, O2 is 55, SO2 is 80%, bicarb is 23, with 2 liter nasal cannula. The patient is at shortness of breath, incomplete of chest pain. His blood pressure is 92 over 50. The most likely cause of this weaning failure is which of the following? Acute left ventricular failure, chronic obstructive pulmonary disease, ventilatory muscle weakness, or hyposympathemia.