Which statement describes an unstable hemodynamic state in acute pulmonary embolism?

Which statement describes an unstable hemodynamic state in acute pulmonary embolism?

• A. Hemodynamically unstable
• B. Hemodynamically stable
• C. Subacute
• D. Chronic

Answer: (A)

In acute pulmonary embolism, instability means the circulatory system can’t maintain blood pressure and perfusion after the clot blocks the pulmonary arteries. When a large clot impedes flow, the right ventricle can fail, forward cardiac output drops, and systemic blood pressure falls. This presents as hypotension (often a systolic blood pressure around or below 90 mmHg, or a significant drop from baseline) with signs of shock or end-organ hypoperfusion, sometimes needing vasopressors or urgent reperfusion. That combination of sudden hemodynamic compromise is what “hemodyamically unstable” describes, making it the best choice. The other terms refer to timing or duration rather than immediate stability: stable means adequate blood pressure and perfusion, while subacute and chronic describe onset timing rather than current hemodynamic state.

In acute pulmonary embolism, instability means the circulatory system can’t maintain blood pressure and perfusion after the clot blocks the pulmonary arteries. When a large clot impedes flow, the right ventricle can fail, forward cardiac output drops, and systemic blood pressure falls. This presents as hypotension (often a systolic blood pressure around or below 90 mmHg, or a significant drop from baseline) with signs of shock or end-organ hypoperfusion, sometimes needing vasopressors or urgent reperfusion. That combination of sudden hemodynamic compromise is what “hemodyamically unstable” describes, making it the best choice. The other terms refer to timing or duration rather than immediate stability: stable means adequate blood pressure and perfusion, while subacute and chronic describe onset timing rather than current hemodynamic state.