The nurse cares for a client diagnosed with acute respirator…

The nurse cares for a client diagnosed with acute respiratory distress syndrome (ARDS).  The positive end expiratory pressure (PEEP) is set at 15 cm H2O.  The ventilator begins alarming and the nurse notes increased HR 120 bpm, decreased blood pressure 90/57 mm Hg, and absent breath sounds in the right lung fields.  Which is the most likely cause for these findings.