What do S3 and S4 sounds mean?
What do S3 and S4 sounds mean? The S3 and S4 heart sounds are both low pitch heart sounds heard in diastole. They differ when they are heard in diastole, S3 being heard early in diastole while S4 is heard later in diastole. The loud S1 is due primarily to greater excursion of the leaflets […]
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