Medtronic announced the FDA approval and launch of the Attain Ability Plus and the Attain Ability Straight left-heart leads for use with cardiac resynchronisation therapy (CRT) devices in treating heart failure patients. The two new dual-electrode leads are the latest offering in a line of advanced left-heart lead options that fit through the Attain Select II sub-selection catheter delivery system and navigate a variety of patient vein anatomies to enhance success during the CRT implant procedure.
A pooled data analysis from several Medtronic left-heart lead studies for 1,307 patients presented at Heart Rhythm 2011, shows a CRT retention rate of 95% at 18 months for the Attain family of left heart leads. In this analysis, CRT retention rate was defined as 18-month survival rate from loss of CRT due to any left ventricle lead-related events that required operative intervention or termination of CRT. The observed events were left ventricule lead dislodgement, phrenic nerve stimulation (PNS) and other left ventricule lead failures such as elevated thresholds, loss of capture and lead fracture. Clinically acceptable performance was achieved in the majority of patients in this analysis using a variety of Medtronic left-ventricle leads to accommodate varying anatomies.
“The varying left-heart lead designs that are now available allow physicians to provide their patients with a more individualised approach to CRT delivery and more consistent, effective delivery of this therapy,” said Derek V Exner, clinical scholar director, CON-ECT clinical coordinating centre medical director, Cardiac Device Program, Calgary Region, Libin Cardiovascular Institute of Alberta, Canada.
Attain Ability Plus enables physicians to reach and maintain the target vein, providing stability in medium-to-large venous anatomies, while Attain Ability Straight allows physicians to maneuver through small cardiac veins. These leads are part of the only portfolio of medical technology to incorporate NASA-developed insulation material that was previously evaluated for space applications, high-performance engines and harsh environments.
An important factor associated with achieving effective delivery of CRT in patients with heart failure is the position of the left ventricular lead. Navigating the lead through the heart’s anatomy is a complex process and placing the lead in the ideal location on the left ventricle proves challenging. The design of the Attain Ability Plus and Attain Ability Straight left-heart leads, combined with their capacity to be delivered via the Attain Select II, a sub-selection catheter (in leads >= 88 cm in length), assists physicians in placing the lead directly in difficult to reach locations in the heart.
According to clinical studies conducted on these leads, approximately 94% of physicians positively rated the ability to position the Attain Ability Plus lead to the desired cardiac veins, with a one-month complication-free rate of 98.5%. Additionally, 96.8% of physicians positively rated the handling of the Attain Ability Straight and the ability to maneuver it to the appropriate veins, with a low lead-dislodgement rate of 3.2%. Both left-heart leads offer multiple pacing vectors, which may help address PNS and help prevent the need to reposition the lead invasively.
“The Attain Ability Plus and Attain Ability Straight left-heart leads add to our extensive portfolio of innovative product offerings that are developed using cutting-edge technology to address the complex challenges associated with CRT response in heart failure patients,” said Pat Mackin, president of the Cardiac Rhythm Disease Management business and senior vice president at Medtronic. “We are committed to offering physicians an array of innovative medical solutions across the continuum of care, including a broad selection of left-ventricular leads.”
In addition to the United States, the Attain Ability family of left-heart leads is available in Australia, Canada, Europe, Greece, Israel, Japan, Malaysia, New Zealand and the Middle East. Attain Ability Plus and Attain Ability Straight are compatible with the Attain family of exclusive delivery tools including the Attain Select II, the Attain Hybrid Guide Wires and Attain Command. As part of Medtronic’s fully integrated CRT systems, the entire Attain portfolio, can be used with both the Protecta and Vision 3D portfolios of CRT-Ds and CRT-Ps.
