For percussing the heart size in males, which intercostal spaces are used?

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Multiple Choice

For percussing the heart size in males, which intercostal spaces are used?

Explanation:
Percussion is used to map the heart’s vertical size by locating where its dullness ends in the chest. In a typical male, the upper edge of the heart’s dullness sits around the left 3rd intercostal space near the sternum, and the lower edge sits around the left 5th intercostal space at the midclavicular line. Percussing through the 3rd, 4th, and 5th intercostal spaces captures this range and defines the heart’s size. Spaces above (like the 2nd) would sample lung tissue, not the heart, and spaces below (like the 6th) extend into diaphragmatic or lung base areas, not the cardiac silhouette. So the 3rd to 5th intercostal spaces are used to estimate heart size in this context.

Percussion is used to map the heart’s vertical size by locating where its dullness ends in the chest. In a typical male, the upper edge of the heart’s dullness sits around the left 3rd intercostal space near the sternum, and the lower edge sits around the left 5th intercostal space at the midclavicular line. Percussing through the 3rd, 4th, and 5th intercostal spaces captures this range and defines the heart’s size. Spaces above (like the 2nd) would sample lung tissue, not the heart, and spaces below (like the 6th) extend into diaphragmatic or lung base areas, not the cardiac silhouette. So the 3rd to 5th intercostal spaces are used to estimate heart size in this context.

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