Which of the following conditions would tend to shift the point of maximal impulse (PMI) farther to the left?
I.pulmonary emphysema
II.collapse of the left lower lobe
III.collapse of the right lower lobe
IV.right-sided tension pneumothorax

Question

Quizplus · Accepted Answer

Collapse of the left lower lobe (II) can cause a shift of the PMI to the left, as it reduces the volume of the left lung and displaces the heart towards the left. Right-sided tension pneumothorax (IV) can also shift the PMI to the left due to the compression of the right lung and the displacement of the heart to the left. Pulmonary emphysema (I) and collapse of the right lower lobe (III) do not generally cause a shift of the PMI to the left.

Which of the Following Conditions Would Tend to Shift the Point