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Use of a Percutaneous Ventricular Assist Device/Left Atrium to Femoral Artery Bypass System for Cardiogenic Shock
Published on: August 16, 2021
Emergent percutaneous therapy for left ventricular assist device retrograde flow
Ryan E Wilson1, John C Gurley1, Navin Rajagopalan1
1Division of Cardiovascular Medicine, University of Kentucky, 900 South Limestone, Room 326 Wethington Building, Lexington, Kentucky, 40536.
Insights
The growing population of left ventricular assist device (LVAD) patients faces challenges with both bleeding and clotting. New prompt percutaneous therapies are needed to manage these complex complications and stabilize patients.
Area of Science:
- Cardiology
- Biomedical Engineering
Background:
- The number of heart transplants is limited by donor availability, leading to an increasing reliance on left ventricular assist devices (LVADs).
- Patients are living longer with LVADs for bridge-to-transplant or destination therapy, increasing the incidence of device-related complications.
Observation:
- Physicians frequently encounter patients with concurrent bleeding and thrombotic complications.
- Managing anticoagulation in LVAD patients is challenging; reducing it for bleeding increases thrombosis risk, while pump thrombosis has limited non-surgical treatment options.
Findings:
- Surgical pump exchange is the definitive treatment for pump thrombosis but carries high risks.
- Temporary LVAD deactivation can lead to rapid patient decline due to retrograde flow.
Implications:
- There is a critical need for prompt, effective percutaneous therapies to manage bleeding and thrombosis in LVAD patients.
- Developing new strategies is essential for improving outcomes and patient stability in this growing population.
Abstract:
With the number of heart transplants being performed each year stagnating due to lack of donors the left ventricular assist device (LVAD) patient population will continue to grow. As more and more patients are living longer with LVADs, either as a bridge to transplant or destination therapy, we will continue to see an increased number of complications related to assist device therapy. One of the common challenges physicians face are patients who suffer from both bleeding and thrombotic complications. When bleeding complications occur anticoagulation is usually reduced or discontinued and then the thrombosis risk increases. Once a pump thrombosis occurs there are limited percutaneous treatment strategies available, especially in the setting of a recent bleeding event. Surgical exchange is the only definitive therapy and that can be a high risk and difficult operation. Turning off an LVAD may become necessary, as it did in our case, but that can lead to significant retrograde flow through the device and rapid patient decline. A prompt percutaneous therapy is needed to stabilize these patients.
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