Abstract: The ultrasonic cardiac catheter apparatus comprises a catheter member, an ultrasound generator source and means containing liquid chemicals that will aid in carrying the high frequency sound waves, or will aid in identifying or dissolving the blockage. The catheter member is adapted having a suitable length and having, at one end, a central port or coupling to the ultrasonic sound generator, and for coupling to selected liquid chemical sources, such as sterile normal saline, dyes or clot busting chemicals that act, respectively, as sound carriers means, catheter inflating means, or that are used to help identify the location of a blockage, or help dissolve blockages. The catheter member is used in conjunction with an introducer and sheath means. The catheter member may be made of flexible tubular material that facilitates balloon action, or may be made of ceramic fibers whose structure facilitates transmission of sound impulses to the location to be cleared.