Healthcare equipment maker Opto Circuits (India) Ltd on Tuesday agreed to acquire US-based cardiology device maker Cardiac Science Corp. for $2.3 ('102.35) a share, gaining entry into the automated external defibrillation market. This is the largest of Opto Circuits' nine acquisitions since 2001. Cardiac Science had 23.82 million shares outstanding as on Monday, valuing the buyout at $54.8 million, according to Reuters data. A spokesperson for Opto Circuits put the total cost of acquisition, including employee severance payout and cost of debt, at $80-85 million. Cardiac Science expects to earn $145-150 million in revenue in 2010, according to Reuters. “This transaction…will greatly enhance product offering and presence in the US,” Vinod Ramnani, Opto Circuits' chairman and managing director, said in a statement. […]