Which option represents a reversible cause among the Hs and Ts that is a thrombosis of the pulmonary vasculature?

Which option represents a reversible cause among the Hs and Ts that is a thrombosis of the pulmonary vasculature?

• A. Hypovolemia
• B. Hypoxia
• C. Thrombosis, pulmonary
• D. Tamponade

Answer: (C)

Pulmonary thrombosis refers to a clot in the pulmonary arteries, i.e., a pulmonary embolism. In the Hs and Ts framework for reversible causes of cardiac arrest, a thrombosis in the pulmonary vasculature is considered reversible because removing or dissolving the clot can restore blood flow to the lungs and improve drainage back to the heart. Recognizing this possibility prompts rapid definitive care, such as oxygenation, hemodynamic support, and expedited transport for treatments like thrombolysis or embolectomy when appropriate. The other options describe conditions that aren’t thrombosis of the pulmonary vessels (hypovolemia is low circulating volume, hypoxia is insufficient oxygenation, tamponade is a pericardial pressure issue) and thus don’t fit the specific pul­monary vascular thrombosis scenario.

Pulmonary thrombosis refers to a clot in the pulmonary arteries, i.e., a pulmonary embolism. In the Hs and Ts framework for reversible causes of cardiac arrest, a thrombosis in the pulmonary vasculature is considered reversible because removing or dissolving the clot can restore blood flow to the lungs and improve drainage back to the heart. Recognizing this possibility prompts rapid definitive care, such as oxygenation, hemodynamic support, and expedited transport for treatments like thrombolysis or embolectomy when appropriate. The other options describe conditions that aren’t thrombosis of the pulmonary vessels (hypovolemia is low circulating volume, hypoxia is insufficient oxygenation, tamponade is a pericardial pressure issue) and thus don’t fit the specific pul­monary vascular thrombosis scenario.