splitting of heart sounds

splitting of heart sounds
the presence of two components in the first or second heart sound complexes; used chiefly to denote the separation of the elements of the second sound, with the first component heard normally corresponding to aortic valve closure (aortic second sound) and the second to pulmonic valve closure (pulmonic second sound). The gap between the two components normally varies with the phases of respiration.

Medical dictionary. 2011.

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