Answer
An insufficient valve makes a swishing or gurgling sound. A stenotic valve makes a high pitched sound or a click.
Work Step by Step
An insufficient valve does not close sufficiently or completely, so it makes a swishing or gurgling sound as blood backwashes or flows back into the chamber it just left. A stenotic valve is stiffened and narrowed, which prevents it from opening completely, so it makes a high pitched sound or a click.
