Patient Data Exhibits Heart sounds are loudest for S1 at the dropdown and for S2 at the dropdown.

S1 (First Heart Sound): Loudest at the apex of the heart, which is located at the 5th intercostal space, midclavicular line. It is caused by the closure of the mitral and tricuspid valves. S2 (Second Heart Sound): Loudest at the base of the heart, which is located at the 2nd intercostal space, near the aortic and pulmonic areas. It is produced by the closure of the aortic and pulmonic valves. Center of the heart. No major auscultation point is located in the center. The heart sounds are best heard where blood flow is directed against the chest wall, not in the middle of the thorax. Left side of the heart. While the left heart contains the mitral and aortic valves, this is too vague.The mitral sound (S1) is best heard at the apex, while the aortic sound (S2) is best heard at the base. Right side of the heart. The tricuspid and pulmonic valves are on the right, but heart sounds are best heard at specific points rather than the general right side.