Type B aortic dissection is a serious cardiovascular condition associated with high morbidity and mortality in which the upper segment of the body’s main artery has become torn along the innermost layer of the vessel wall.

Supported by the results of the US Medtronic Dissection trial, the new indication expands treatment options for this challenging patient population by providing physicians with a minimally invasive alternative to open surgical repair and medical therapy.

University of Pennsylvania in Philadelphia professor of surgery and director of the thoracic aortic surgery program and a national principal investigator for Dissection Dr Joseph Bavaria noted acute type B aortic dissection is a potentially life-threatening condition that historically has been treated with either medical therapy or, when necessary, through invasive surgical techniques.

"The trial we conducted shows that endovascular repair with the Valiant Captivia System provides a safe, effective and potentially life-saving treatment option for acute dissection patients," Bavaria added.

Presented by Dr Bavaria on 27 January 2014 at the 2014 annual meeting of the Society for Thoracic Surgery, 12-month data from the 50 patients evaluated in Dissection demonstrate safety and efficacy of the Valiant captivia system in the treatment of dissections, with excellent technical success.

Conducted at 16 US sites, the trial met its primary safety endpoint by achieving an 8% all-cause mortality rate at 30 days, which represents a three- to four-fold mortality improvement over open surgical repair. Additionally, 100% technical success and 100% coverage of the primary entry tear at implant were achieved in the trial.

Indicated for a variety of thoracic aortic lesions, the Valiant captivia system features a unique proximal tip-capture mechanism, which enables controlled deployment and accurate placement of the stent graft. Based on independent conformability bench testing of multiple thoracic stent grafts, the Valiant stent graft is the only device that maintains complete apposition to the vessel wall regardless of angulation or oversizing.

Since its initial 2005 launch in Europe, the Valiant stent graft has been implanted in about 50,000 patients worldwide — more than any device of its kind.