Ziegelmueller Johannes Amadeus, Lange Rüdiger, Bleiziffer Sabine
Clinic for Cardiovascular Surgery, German Heart Center Munich, Munich, Germany.
J Thorac Dis. 2015 Sep;7(9):1548-55. doi: 10.3978/j.issn.2072-1439.2015.09.11.
Calcific aortic stenosis is the most frequent manifestation of valvular heart disease. The preferred treatment for patients of all age groups is surgical aortic valve replacement. Recently, transcatheter aortic valve implantation (TAVI) has become the standard of care for patients that are deemed to be at high risk for open heart surgery. The most common access route for TAVI is the retrograde transfemoral (TF) approach, followed by the antegrade transapical (TA) approach. Both access routes have distinct indications. While the TF route is least invasive and the access of choice at most centers, the apical route is used complementary in patients with poor femoral access. In addition, the TA approach holds various benefits such as a short distance from the operator to the annulus facilitating exact positioning of the valve and the possibility to accommodate larger sheaths. Furthermore, the TA approach not only provides direct access to the aortic valve but also the mitral valve allowing for a wide range of interventions. Various apical closure devices are currently being developed under the premise of increasing overall safety of the TA-TAVI approach by further standardizing the procedure, alleviating left ventricular access and minimizing the risk of complications, such as apical bleeding. The aim of this article is to give an overview of current devices for apical closure. The ideal apical closure device should be easy to put in place, leave a minimum of foreign material, provide complete hemostasis and have a minimal risk of displacement. So far the range of commercially available devices in Europe is very limited with only one CE-certified device on the market and one device that is expected to receive CE-certification soon. Off-the-shelf closure devices could help flatten the initial operator learning curve and facilitate a safe apical access, ultimately leading to an entirely percutaneous TA-TAVI approach.
钙化性主动脉瓣狭窄是瓣膜性心脏病最常见的表现形式。所有年龄组患者的首选治疗方法是外科主动脉瓣置换术。近年来,经导管主动脉瓣植入术(TAVI)已成为被认为进行心脏直视手术风险较高患者的标准治疗方法。TAVI最常见的入路是逆行经股动脉(TF)途径,其次是顺行经心尖(TA)途径。两种入路都有不同的适应症。虽然TF途径侵入性最小,是大多数中心的首选入路,但心尖途径用于股动脉入路不佳的患者作为补充。此外,TA途径有多种优点,如从操作者到瓣环的距离短,便于瓣膜精确定位,并且有可能容纳更大的鞘管。此外,TA途径不仅可直接进入主动脉瓣,还可进入二尖瓣,从而允许进行广泛的干预。目前正在开发各种心尖闭合装置,其前提是通过进一步规范手术、减轻左心室入路难度并将并发症风险(如心尖出血)降至最低,来提高TA-TAVI手术的整体安全性。本文旨在概述当前的心尖闭合装置。理想的心尖闭合装置应易于放置,留下最少的异物,提供完全止血,且移位风险最小。到目前为止,欧洲市场上可买到的装置种类非常有限,只有一种获得CE认证的装置,还有一种预计很快将获得CE认证。现成的闭合装置有助于缩短操作者最初的学习曲线,并便于安全的心尖入路,最终实现完全经皮的TA-TAVI手术。