After aortofemoral bypass was transferred to ICU for ventilation and monitoring, the nurse noticed that the patient pulled the catheter line from the catheter sheath and then developed hypotension, tachycardia, ABG showed hypoxia and hypercapnia

After aortofemoral bypass was transferred to ICU for ventilation and monitoring, the nurse noticed that the patient pulled the catheter line from the catheter sheath and then developed hypotension, tachycardia, ABG showed hypoxia and hypercapnia what is the first measure to do?
• Dopamine infusion.
• Giving fluids
• Heparin.***
• Assuring left lateral decubitus.