Clinical Trial Shows Device Optimizes Cardiac Resynchronization Therapy in Less Than Two Minutes; St. Jude Medical Announces QuickOpt Optimization Clinical Trial Results and European Regulatory Approvals at Cardiostim 2006.

ST. PAUL, Minn. -- St. Jude Medical, Inc. (NYSE:STJ) today announced the clinical trial results, receipt of European CE Mark approval and European market launch of its QuickOpt(TM) Timing Cycle Optimization. The trial results were presented by James G. Porterfield, M.D., principal investigator in the trial conducted under a U.S. Food and Drug Administration (FDA) Investigational Device Exemption (IDE), during a late-breaking clinical trial session at Cardiostim 2006 in Nice, France.

The IDE study found that QuickOpt optimization consistently was comparable to a traditional echocardiography (echo) procedure for determining optimal conduction delays. QuickOpt procedures in the study were completed within two minutes, while echo optimization typically takes between 30 and 120 minutes and requires a manual investigation by a technician.

Results showed QuickOpt optimization correlated consistently with echo more than 96 percent of the time for both atrial-ventricular (AV) timing and for ventricular-ventricular (VV) timing. The study endpoint required a correlation greater than 90 percent.

The prospective, multicenter trial evaluated 115 cases, including heart failure and traditional ICD patients. All patients were implanted with St. Jude Medical dual-chamber implantable cardioverter defibrillators (ICDs) or cardiac resynchronization therapy defibrillators (CRT-Ds). Patients were evaluated using echo to determine the optimal setting for synchronizing the rhythm of the upper chambers (atria) and lower chambers (ventricles) of the heart, and for properly timing the pumping of the right and left ventricles. Patients then underwent the same testing using the QuickOpt optimization feature.

"My initial experience with QuickOpt is impressive, consistently recommending similar programming when compared to echo. It is a fast and simple way to optimize timing, which has been shown to contribute to improved left ventricular performance," said Dr. Peter Sogaard of Gentofte University Hospital in Hellerup, Denmark, who was among the first to use the QuickOpt feature.

Because echo can be expensive and time consuming, most heart failure patients do not undergo timing cycle optimization. QuickOpt optimization, which takes less than two minutes, allows efficient and frequent optimization during routine device follow-up visits, and is now clinically proven to be as effective as echo-based optimization.

"Our goal is to provide patients and physicians with easier access to AV and VV timing optimization," said Michael J. Coyle, president of St. Jude Medical's Cardiac Rhythm Management Division. "With the QuickOpt feature, optimization can be performed quickly as part of the normal in-office follow-up visit, which should result in a greater percentage of patients undergoing optimization of timing intervals than when they need to be scheduled for a separate echo study."

Other previously published studies, including a prospective pilot study and a retrospective study comparing optimization methods, had findings similar to the clinical trial results. Several studies have evaluated the benefits of optimized cardiac device programming, showing improved quality of life and improvements in heart failure class (as measured by New York Heart Association standards) for patients.

St. Jude Medical has filed a pre-market approval (PMA) supplement application with the FDA for programmer software with the QuickOpt feature. The FDA is currently reviewing the QuickOpt optimization clinical trial results and the software submission.

The QuickOpt feature, available outside the United States on the St. Jude Medical Merlin(TM) Patient Care System and 3510 programmer, quickly provides information on a results screen. Clinicians can then accept or modify the recommended results and program the device accordingly. The QuickOpt feature is compatible with all St. Jude Medical multi-chamber ICDs.

About St. Jude Medical

St. Jude Medical is dedicated to making life better for cardiac, neurological and chronic pain patients worldwide through excellence in medical device technology and services. The Company has five major focus areas that include: cardiac rhythm management, atrial fibrillation, cardiac surgery, cardiology and neuromodulation. Headquartered in St. Paul, Minn., St. Jude Medical employs approximately 10,000 people worldwide. For more information, please visit www.sjm.com.

Forward-Looking Statements

This news release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that involve risks and uncertainties. Such forward-looking statements include the expectations, plans and prospects for the Company, including potential clinical success, regulatory approvals, anticipated future product launches, revenues, margins, earnings, and market shares. The statements made by the Company are based upon management's current expectations and are subject to certain risks and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. These risks and uncertainties include market conditions and other factors beyond the Company's control and the risk factors and other cautionary statements described in the Company's filings with the SEC, including the risk factors described in the Company's Annual Report on Form 10-K filed on March 16, 2006 (see Item 1A on pages 15-21) and the cautionary statements described in the Company's Quarterly Report on Form 10-Q filed on May 9, 2006 (see pages 29-30). The Company does not intend to update these statements and undertakes no duty to any person to provide any such update under any circumstance.