A nurse is caring for a patient with suspected pulmonary embolism who has been receiving anticoagulation therapy for 48 hours. The patient suddenly develops severe dyspnea, chest pain, and hypotension. Which nursing intervention should be the priority?

Preparing for thrombolytic therapy is the priority as acute deterioration with hypotension indicates massive PE requiring immediate clot dissolution. Other interventions address symptoms but do not treat the underlying cause.

Clinical Priority Setting for Massive Pulmonary Embolism

The scenario describes a patient with a known pulmonary embolism (PE) who, despite 48 hours of anticoagulation, acutely decompensates with severe dyspnea, chest pain, and hypotension. This clinical picture represents a transition to a high-risk or massive pulmonary embolism, defined by hemodynamic instability. In this context, the priority nursing intervention shifts from supportive care to preparing for definitive, life-saving reperfusion therapy.

While increasing oxygen, administering morphine, and repositioning are all appropriate nursing actions for a patient with PE, they are supportive measures that do not address the underlying, immediately life-threatening pathophysiology. The sudden onset of hypotension indicates right ventricular failure and obstructive shock due to a large clot burden in the pulmonary arteries. The physiological focus, as highlighted in the evolution of PE management, must be on rapidly reducing this obstruction to restore right ventricular function, pulmonary artery pressures, and cardiac output ^[1]. Administering morphine, a vasodilator, could further drop the patient's preload and blood pressure, potentially worsening the shock state. Therefore, the nurse's immediate priority is to anticipate and prepare for the administration of systemic thrombolytic therapy, which is the first-line definitive treatment for massive PE with shock. This involves gathering necessary equipment, ensuring IV access, drawing labs, and coordinating with the rapid response team or provider to deliver the fibrinolytic agent without delay.

The critical nature of this intervention is underscored by evidence showing that thrombolysis is a key strategy in managing cardiac arrest and peri-arrest states caused by PE. A systematic review and meta-analysis has evaluated the role of intra-arrest thrombolysis, demonstrating its potential benefit in cases where PE is the suspected etiology of hemodynamic collapse ^[4]. Although this patient has not yet arrested, the presence of shock places them on a trajectory toward cardiac arrest, making rapid preparation for thrombolysis the highest-priority action to prevent further deterioration. The historical perspective on PE management confirms a decades-long reliance on systemic thrombolysis as the foundational therapy for reversing this physiology before the advent of more advanced catheter-based interventions ^[1]. In a massive PE, the nurse's role is to facilitate the swift delivery of this clot-dissolving medication to reduce pulmonary vascular resistance and salvage cardiac function.