Which heart valve is located at the 4th intercostal space?

The heart valve located at the 4th intercostal space is the tricuspid valve. This valve is positioned at the right atrioventricular opening and is typically auscultated at the left sternal border around the 4th intercostal space. In the context of auscultation, the aortic valve is instead generally noted at the right second intercostal space, while the pulmonary valve is auscultated at the left second intercostal space. The mitral valve is located at the 5th intercostal space, specifically in the mid-clavicular line. This anatomical knowledge is essential for proper cardiac examination techniques, allowing for accurate identification of heart sounds in relation to the underlying heart structures.