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CARDIOVASCULAR ANESTHESIA

Prosthetic Valve Malfunction Masked by Intraoperative Pressure Measurements

Kent H. Rehfeldt, MD^*, and Roger L. Click, MD

Departments of *Anesthesiology and Cardiology, Mayo Clinic, Rochester, Minnesota

Address correspondence and reprint requests to Kent H. Rehfeldt, MD, Department of Anesthesiology, Mayo Clinic, 200 First St. S.W., Rochester, MN 55905. Address e-mail to rehfeldt.kent@ mayo.edu.

IMPLICATIONS: We describe a case in which intraoperative echocardiography recorded an abnormally high pressure gradient across a newly implanted mechanical heart valve. However, inserting pressure-transducing needles on each side of this prosthesis did not confirm the echocardiographic findings. The prosthesis was later confirmed to be malfunctioning and was replaced.

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