Pathology Sudden death, right sided hea failure (cor pulmonale or cardiovascular collapse occur when ? A Small pulmonary embolism B Massive pulmonary embolism C 60% or more of pulmonary aery is obstructed with emboli D End aery obliteration 💡 Explanation Sudden death, right sided hea failure (cor pulmonale or cardiovascular collapse occur when ? ✓ Correct Answer: C. 60% or more of pulmonary aery is obstructed with emboli