Oxford Finance and Silicon Valley Bank have closed an $11 million round of debt financing for venture-backed company CardioFocus, a medical device manufacturer. Based in Massachusetts, CardioFocus makes devices that treat cardiac disorders like atrial fibrillation. Its HEARTLIGHT Endoscopic Ablation System for catheter ablation lets physicians see within the heart and visually direct laser energy to isolate pulmonary veins. The company has taken in several rounds of VC financing from firms like H.I.G. BioVentures, SV Life Sciences Advisers and The Aurora Funds.