当前位置： SCI文献检索 > JOURNAL OF VASCULAR SURGERY期刊下所有文献 > Successful ventricular transapical thoracic endovascular graft deployment in a pig model.

Successful ventricular transapical thoracic endovascular graft deployment in a pig model.

Abstract：

PURPOSE:Aortoiliac occlusive disease may preclude retrograde thoracic endovascular aortic repair. This study evaluated the physiologic and anatomic feasibility of introducing an aortic endograft in an antegrade manner into the descending thoracic aorta of a pig through the left ventricular apex. METHODS:Twelve adult pigs were to undergo antegrade endograft deployment. Under fluoroscopic guidance, a stiff guidewire was introduced past the aortic valve and into the distal abdominal aorta through the left ventricular apex on a beating heart. An 18F introducer sheath containing a 24 x 36-mm aortic endograft was introduced and deployed in the descending thoracic aorta. The accuracy of graft delivery was determined at necropsy by measuring the distance from the trailing edge of the graft to the downstream margin of the ostium of the left subclavian artery. Aortic valve competency was assessed angiographically and at necropsy. Left ventricular function was assessed angiographically. Five hemodynamic and respiratory variables were recorded at 12 stages during the procedure and assessed for significant changes from baseline. RESULTS:One animal died during the sternotomy. All remaining pigs survived the experiment with minimal hemodynamic support. A significant drop in systolic blood pressure (75 +/- 2 to 60 +/- 4 mm Hg, P = .05) was noted when the aortic valve was crossed with an 18F sheath. The systolic blood pressure returned to baseline on endograft deployment and at the end of the procedure. Bradycardia was noted at several stages of the procedure, requiring treatment in two pigs. Eleven endografts were deployed; seven grafts were delivered within 5 mm and three grafts within 10 to 20 mm of the intended landing point. One graft was deployed 10 mm too proximally, covering the left subclavian artery. No aortic valvular insufficiency or left ventricular dysfunction was noted. CONCLUSION:An aortic endograft can be delivered in an antegrade manner transapically into the descending thoracic aorta in a pig model with a reasonable degree of accuracy and minimal hemodynamic compromise.

journal_name

J Vasc Surg

journal_title

Journal of vascular surgery

authors

Grenon SM,MacDonald S,Sidhu RS,Reid JD,Cheung A,Hsiang Y,Clement J

doi

10.1016/j.jvs.2008.06.043

subject

Has Abstract

pub_date

2008-11-01 00:00:00

pages

1301-5

issue

eissn

0741-5214

issn

1097-6809

pii

S0741-5214(08)00974-9

journal_volume

pub_type

杂志文章

在线工具

Successful ventricular transapical thoracic endovascular graft deployment in a pig model.