Shock wave balloon catheter with multiple shock wave sources

A device for generating shock waves for treating a calcified lesion within a blood vessel or a calcified aortic valve comprising:

• an axially extending elongate member;
• a chamber mounted on the elongate member, the chamber being fillable with a conductive fluid;
• at least two electrode pairs mounted to the elongate member and located within the chamber, each of the at least two electrode pairs comprising spaced apart electrodes, wherein the at least two electrode pairs are configured to produce shock waves that propagate through the conductive fluid;
• a first electrically conductive pathway electrically connecting a first electrode pair of the at least two electrode pairs in series with a second electrode pair of the at least two electrode pairs, the first electrically conductive pathway extending along the elongate member, a proximal end of the first electrically conductive pathway forming an electrode of the first electrode pair and a distal end of the first electrically conductive pathway forming an electrode of the second electrode pair;
• and
• second and third electrically conductive pathways that extend along the elongate member and are electrically connected to the at least two electrode pairs such that the shock waves are produced by the at least two electrode pairs when a sufficiently high voltage pulse is applied to the second and third electrically conductive pathways.