Surface Projections

Surface projections of the heart may be traced on the anterior chest wall (Figure III-2-14).

■ The right border extends from the margin of the third right costal cartilage to the sixth right costal cartilage just to the right of the sternum.

■ The inferior border extends from the sixth right costal cartilage to the fifth left intercostal space at the midclavicular line.

• The left border extends from the fifth left intercostal space to the second left costal cartilage.

• The superior border extends from the inferior margin of the second left costal cartilage to the superior margin of the third right costal cartilage.

Right atrium

Right ventricle

Left atrium

Left ventricle

Left atrium

Left ventricle

Right atrium

Right ventricle

Figure lll-2-15.The Chambers of the Heart

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