1. Apparatus for transtelephonic monitoring of acoustic clicks of a prosthetic heart valve comprising: a sensor means for sensing said acoustic clicks at a first rate and for converting said sensed acoustic clicks to an input signal; means responsively coupled to said sensor means for converting said input signal to a digital signal; means responsively coupled to said converting means for storing said digital signal; means responsively coupled to said storing means for transmitting said digital signal transtelephonically at a different second rate; and means responsively coupled to said transmitting means for receiving said digital signal transtelephonically.