SOUTH JORDAN, Utah, Oct. 15, 2007 (PRIME NEWSWIRE) -- Merit Medical Systems, Inc. (Nasdaq:MMSI), a leading manufacturer and marketer of proprietary disposable devices used primarily in cardiology and radiology procedures, announced today that gross margins for the third quarter ended September 30, 2007 are anticipated to be approximately 39.1%, an improvement of 140 basis points sequentially from the second quarter of 2007.