<prompt> The treatment most likely to benefit a patient of massive pulmonary embolism in shockThrombolytic therapyInotropic agentVasodilator therapyDiuretic therapy  <response>: For a patient with massive pulmonary embolism in shock,primary therapy consists of clot dissolution with thrombolytics like tPAstreptokinase or removal of PE by embolectomy.The preferred fibrinolytic regimen is 100 mg of recombinant tPAtissue plasminogen activator administered as a continuous peripheral iv infusion over 2 hours.Anticoagulation with heparin and warfarin or placement of an inferior vena cava filter constitutes secondary prevention of recurrent PE. Reference:Harrisons Medicine-18th edition, page no:2174-2176. 