A case of a 56-year-old woman with normal coronaries displays the side-to-side motion of the unengaged catheter followed by the rhythmic up-and-down, piston-like movements of the catheter tip after engagement.
Ammar KA, Bajwa T, Allaqaband SQ, Defranco A. Understanding the Musical Dance of the Engaged Coronary Catheter: Insights From Advanced Myocardial Mechanics. J Invasive Cardiol. 2018;30(9):E97-E98.