MINEOLA, N.Y. — The attorney for a Long Island cardiologist says his client “vehemently denies” charges he placed a hidden camera in an office bathroom.

Vincent Pacienza pleaded not guilty Wednesday in Nassau County Court to a charge of unlawful surveillance.

The Manhasset cardiologist was arrested in June 2008. Prosecutors claim he installed a video camera hidden inside an air purifier, a device his attorney referred to as a “nanny-cam.”

Attorney Dennis Lemke says there is no evidence his client ever recorded any images with the camera. He said his client is a respected cardiologist who continues to maintain a “thriving” business despite the allegations.

Pacienza could face up to four years in prison if convicted. The state health department’s Office of Professional Medical Conduct is also investigating.