TEWKSBURY, Mass.--(BUSINESS WIRE)--Cambridge Heart, Inc. (OTCBB: CAMH), a developer of non-invasive diagnostic tests for cardiac disease, today announced certain preliminary results for the fourth quarter ended December 31, 2011. In the fourth quarter, purchasers of Cardiac Science’s Q-Stress system ordered 138 Microvolt T-Wave Alternans™ (MTWA) OEM Modules, compared with 45 units in the previous quarter. The Company also announced that its preliminary unaudited revenue for the fourth quarter was approximately $550,000, representing a 16 percent increase over the third quarter of 2011.