CHATSWORTH, Calif.--(BUSINESS WIRE)--North American Scientific, Inc. (Nasdaq:NASI) today announced that it has executed a Fifth Amendment and Forbearance to its Loan and Security Agreement with Silicon Valley Bank (the “Bank”). The Amendment includes: (i) an extension of the maturity date of the Loan Agreement to November 9, 2007, and an extension of the maturity date of the Bridge Loan Sublimit to the earlier of November 9, 2007 or the date the Company closes a private investment public equity transaction, (ii) a forbearance by the Bank from exercising its rights and remedies against the Company, until such time as the Bank determines in its discretion to cease such forbearance, due to the defaults under the Loan Agreement resulting from the Company failing to comply with the tangible net worth covenant in the Loan Agreement as of July 31, 2007, August 31, 2007 and September 30, 2007, and (iii) a consent to an increase in the Company’s subordinated debt facility with Agility Capital LLC from $750,000 to up to $1,000,000.