Abstract
Purpose We examine the effects of fixed rate shock wave administration on the cardiac rhythm and treatment efficacy of a tubless lithotriptor (Dornier MFL 5000 * * Dornier Medical Systems, Marietta, Georgia. ). A secondary goal was to examine the treatment efficacy of fixed shock were administration compared to R wave triggered lithotripsy. Materials and Methods In this prospective study Holter monitoring was used before, during and after nonR wave triggered shock wave lithotripsy. Results An increase in premature ventricular contractions was noted during shock wave lithotripsy. However, there were no episodes of significant ventricular ectopia, ventricular tachycardia, asystole or heart block as a result of nonR wave triggered shock wave administration. NonR wave gated shock wave lithotripsy expedited patient treatment (mean treatment time 46 plus/minus 21 minutes), minimized the use of sedation during treatment and produced results similar to R wave gated shock wave lithotripsy with the MFL 5000 lithotriptor. Conclusions With adequate precautions, fixed rate shock wave administration would appear to be a reasonable option to treat urolithiasis with the MFL 5000 lithotriptor as with other newer lithotriptors.
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