FDA approves devices for heart failure patients

The U.S. Food and Drug Administration today approved a new indication for three cardiac resynchronization therapy defibrillators (CRT-D) used to treat certain heart failure patients. The new use is for patients with an abnormality known as left bundle branch block, which occurs when there is delayed activation and contraction of the left ventricle. The three devices, all manufactured by Boston Scientific Corp., are intended to treat patients with left bundle branch block who have either mild heart failure or heart failure with no apparent symptoms.

The CRT-D device combines two functions. As an implantable cardioverter defibrillator (ICD) it senses dangerous abnormal heart rhythms and then attempts to shock the heart back into a normal rhythm. As cardiac resynchronization therapy, it generates small electrical impulses to coordinate the beating of the left and right ventricles so that they work together more effectively to pump blood throughout the body.

CRT-Ds are to be used as an addition to, not a replacement for, heart failure drug therapy.

“This approval allows heart failure patients with left bundle branch block to benefit from this therapy," said Jeffrey Shuren, M.D., director of the FDA’s Center for Devices and Radiological Health. “The FDA is pleased to safely make this new technology available for a greater number of heart failure patients."

The FDA based its approval on the results of the 1,820-patient Multicenter Automatic Defibrillator Implantation Trial with Cardiac Resynchronization Therapy (MADIT-CRT) clinical study. The study which followed 1,820 patients for an average of nearly three years at 110 centers in the United States, Europe, Canada, and Israel. It compared CRT-D therapy to ICD-only therapy in specific heart failure patients to determine whether it reduced the risk of death and heart failure. In patients with left bundle branch block, who represented 70 percent of the study group, CRT-D showed a reduction in the risk of death and heart failure by 57 percent, as compared to ICD alone.

The rate of complications was considered to be acceptable by the FDA for this device, however, physicians should adequately inform patients about potential complications.

As a condition of FDA approval, Boston Scientific must conduct two post-approval studies. One study will evaluate complications and long-term mortality benefits of CRT-D in patients with left bundle branch block identified through the National Cardiovascular Data Registry. The other will follow patients from the original MADIT-CRT clinical study every six months for five years to assess long-term mortality benefits of CRT-D vs. ICD.

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Cardiac Science Notifies AED Customers of Nationwide Voluntary Medical Device Correction

Cardiac Science Corporation [NASDAQ: CSCX] is initiating a voluntary field correction after it was determined certain automated external defibrillators (AEDs) may experience a rare product issue in which the AED may not be able to deliver therapy during a resuscitation attempt. Device failure may affect resuscitation of the patient, which could lead to serious adverse events or death. These AEDs have electronic components which may fail and the failure may not be detected by the device's periodic self-tests. The affected models include the Powerheart 9300A, 9300C, 9300D, 9300E, 9300P, 9390A, 9390E, and CardioVive 92531, 92532, and 92533 devices.

Cardiac Science has received a total of 64 complaints concerning four resistors within certain AEDs. Two of these complaints were associated with a failure to deliver therapy. This issue is predicted to occur in approximately one in 75,000 AEDs manufactured between August 2003 and August 2009. The company has also received 114 complaints regarding "Service Required" messages resulting from a specific relay switch failure. There have been no reported instances where this issue has resulted in an inability to deliver therapy.

Until a correction is available in May, 2010, the company strongly advises customers to check the status indicator on the front of the AED and follow the procedures documented in the materials accompanying the AED. The company advises that customers leave their AEDs in service.

"When customers choose a product from Cardiac Science, they expect outstanding reliability," said Dave Marver, president and chief executive officer. "We understand the role our products play in public health and are taking appropriate measures to further improve the performance of our products."

The company has implemented more stringent testing of the components and all AEDs produced since August, 2009 are unaffected. Customers in possession of an AED that may exhibit either of these issues will be notified immediately. A software update to address the resistor issue will be available by May, 2010. This software update will enhance the AED's self-test capabilities and improve detection of the issue. In the interim, the company advises customers to keep their AEDs in service and follow the normal testing and maintenance procedures found in the Operator and Service Manual. A copy of these procedures is available at www.cardiacscience.com/AED175. At this site, customers may confirm if their AED is affected and register for automatic e-mail reminders to conduct scheduled maintenance.

If the AED is not rescue ready (the indicator is red) customers should contact the company immediately at 425.402.2000 (option 1) within the United States. Outside the US contact +44.161.926.0011 or the local Cardiac Science representative. Customers can also email the company at AED175@cardiacscience.com.

Forward-Looking Statements

This press release contains forward-looking statements. The word "believe," "expect," "intend," "anticipate," variations of such words, and similar expressions identify forward-looking statements, but their absence does not mean that the statement is not forward-looking. Forward looking statements in this press release include, but are not limited to, predictions of AED component failure rates, the availability of software updates to improve detection of the component issue, and the effectiveness of the planned software update. These are forward-looking statements for purposes of the safe harbor provisions under the Private Securities Litigation Reform Act of 1995. Actual results and performance may vary significantly from those expressed or implied in such statements. Factors that could cause or contribute to such varying results and other risks are more fully described in the Annual Report on Form 10-K filed by Cardiac Science Corporation for the year ended December 31, 2008, as updated by subsequent quarterly reports on Form 10-Q. Cardiac Science Corporation undertakes no duty or obligation to update the information provided herein.

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