Which of the following is an indication for pulmonary arterial thrombolysis?

Pulmonary arterial thrombolysis is a therapeutic intervention primarily indicated for the treatment of pulmonary embolism, particularly in cases where the patient is experiencing shock or other signs of systemic hypoperfusion. This condition arises when a blood clot obstructs the pulmonary arteries, thereby disrupting normal blood flow and oxygenation, which can lead to a life-threatening situation.

In the context of pulmonary embolism, systemic hypoperfusion indicates that vital organs are not receiving adequate blood supply, which can result in organ dysfunction. Such critical signs necessitate rapid intervention to restore normal circulation and prevent further complications. Administering thrombolytic therapy in these situations can dissolve the clot more effectively and quickly, alleviating the blockage in the pulmonary arteries and restoring blood flow.

The other options present conditions where thrombolysis may not be appropriate and could pose additional risks to the patient. These include severe, uncontrolled hypertension or active internal bleeding, which can lead to further complications if thrombolytic agents are used. Additionally, a known bleeding diathesis makes thrombolysis particularly hazardous, as it significantly increases the risk of uncontrollable bleeding. Thus, the correct indication for pulmonary arterial thrombolysis is the acute presentation of shock or systemic hypoperfusion due to pulmonary embolism, which necess