Key lessons from cases worldwide.

Since OptiVol fluid status monitoring (Medtronic, Inc., Minneapolis, MN) was released to the market in 2004, the manufacturer has been working together with clinicians to better understand the operation and utility of OptiVol in a clinical setting. This has been done through completed and ongoing clinical studies and through evaluation of case studies submitted by clinicians. In the process, much has been learned about some interesting aspects of OptiVol fluid status monitoring and its use with patients with heart failure.