Thoratec Heartmate II Left Ventricular Assist System (LVAS). Model/Catalog Number 1355 and Model/Catalog Number 102139. Product is manufactured and distributed by Thoratec Corporation, Pleasant, CA. The HM II LVAS is intended to provide hemodynamic support in patients with end-stage, refractory left ventricular heart failure; either for temporary support, such as a bridge to cardiac transplantation or myocardial recovery, or as permanent destination therapy. The HeartMate II is intended for use inside or outside the hospital.

The firm has become aware that, over time, wear and fatigue of the percutaneous lead connecting the HeartMate II Left Ventricular Assist System (HM II LVAS) blood pump with external system controller may result in damage that has the potential to interrupt pump function and may require a reoperation to replace the pump.

An initial "Urgent: Medical Device Correction" letter dated October 21, 2008 and a follow-up letter dated October 24, 2008 were sent to affected HeartMate II Left Ventricular Assist System (HM II LVAS) customers. The letters identified the problem, immediate action and preventive action to be taken by customers and recommended that the pump be replaced as soon as possible if damage to the percutaneous lead is confirmed. If customers suspect that a HM II LVAS patient may have a damaged percutaneous lead, please contact Thoratec Technical Services (800-456-1477) for assistance. A return response (Acknowledgement Form) was included with the letter for consignees to complete and fax it to Thoratec Regulatory Affairs at 925-847-8628. Direct questions to the Thoratec Regulatory Affairs Department at 925-730-4135 (Monday-Friday, 8 a.m.-5 p.m. PST). Clinicians and patients with questions may contact the firm at 800-528-2577, or if calling outside the USA, 925-847-8600 (7 days a week, 8 a.m.-5 p.m. PST). Copies of the press release may be found on the firm's website, www.thoratec.com, under Investor Relations/Press Releases.