Biosense Webster, Inc., a worldwide leader in the diagnosis and treatment of cardiac arrhythmias, announced the FDA approval of the new THERMOCOOL ® SF irrigated ablation catheter in the United States. The THERMOCOOL ® SF NAV Catheter combines Biosense Webster’s latest irrigated ablation technology with the accurate visualization of the CARTO ®3 3D Mapping & Ablation System. The catheter was launched in Europe in October, 2010 and has received excellent feedback from electrophysiologists who have used the product. The THERMOCOOL ® SF NAV Catheter is approved in the United States for treatment of drug refractory recurrent symptomatic paroxysmal atrial fibrillation when used with CARTO ® Systems and Type 1 Atrial Flutter for patients 18 years and older. Unlike competitive irrigated technologies, the innovative catheter design and breakthrough porous tip technology with Surround Flow technology of the THERMOCOOL ® SF Catheter allows for uniform cooling of the entire catheter tip, and efficient heat dissipation when ablating. This cutting edge innovation provides more effective cooling and allows half the volume load to the patient, when compared to the traditional THERMOCOOL ® Catheter. “We are proud to offer electrophysiologists in the United States our latest irrigated ablation technology to help treat patients with cardiac arrhythmias,” said Shlomi Nachman, Worldwide President, Biosense Webster. “With the introduction of the THERMOCOOL ® SF Catheter, we reinforce our market leadership in the electrophysiology marketplace and our passion for excellence in knowledge and innovation.” About AF and cardiac ablation Atrial Fibrillation is the most prevalent arrhythmia, and is a leading cause of stroke among people 65 years and older. Worldwide, it is estimated that 20 million people have AF, yet only ~130,000 are treated with ablation every year. The public health implications of AF are a growing concern because those with AF are at an increased risk of morbidity and mortality as well as a reduced quality of life.