Multiple choice

Primary Pulmonary Hypertension is caused by all, except

  1. hyperventilation

  2. morbid obesity

  3. fenfluramine

  4. high altitude
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Primary pulmonary hypertension can be caused by morbid obesity, fenfluramine use, and high altitude due to hypoxic pulmonary vasoconstriction. Hyperventilation causes respiratory alkalosis and decreased pulmonary vascular resistance, which would lower pulmonary artery pressure, not cause pulmonary hypertension. Therefore, hyperventilation is the exception among the options.

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