Many of you are aware of the benefits of heart transplant in patients with advanced heart failure; however, another form of therapy has been quietly emerging as a viable option for patients suffering from this condition.
A ventricular assist device (VAD) is a battery-operated mechanical pump that helps a weakened heart pump blood into the body. Essentially, it takes over the pumping action of the heart and drives blood into the aorta (the large artery that extends from the left ventricle of the heart and into the abdomen) and throughout the body. The device resides both inside and outside of the body, and is operated by an electric motor powered by a battery pack. The controller and batteries are typically worn over the shoulder or around the waist.
In most cases, VADs offer a short-term solution for patients awaiting a suitable donor for a heart transplant, particularly if their medical therapy has failed or if they’ve been hospitalized with end-stage heart failure. According to the United Network for Organ Sharing, over 2,900 Americans are currently awaiting a heart transplant (43 of which are in Georgia).
However, in some cases patients turn to VADs as an alternative to a heart transplant. We refer to this as ‘destination therapy’, meaning that the LVAD serves as a permanent solution for patients with advanced heart failure. Patients who are not heart transplant candidates but who have severe heart failure often pursue this course of treatment.
Ventricular Assist Devices support the left ventricle (LVAD), the right ventricle (RVAD) or both simultaneously (biventricular, or BiVAD). LVADs are used most commonly, and have been in existence for over twenty-five years.
A recent study comparing a new generation LVAD to an older model showed a marked improvement in survival at 2 years (58% vs 25%). In addition, patients reported an improved quality of life. As a result the FDA approved the Heartmate II as destination therapy for patients with end-stage heart failure.
Despite the severity of their illnesses, 70-80% of LVAD patients survive to transplantation.
There are several different types of LVADs, and I’ll go into more detail about specific devices and technology that the Emory Heart and Vascular Center utilizes in a later post. You’ll also hear from two very special patients who have been kind enough to share their stories with us.
Do you have any questions or thoughts about VAD technology or heart conditions in general? If so, please share them with me in the comments.
About Sonjoy Laskar, MD:
Dr. Laskar joined Emory Healthcare in 2005 and has devoted his career to providing direct care to patients with heart failure, heart transplantation and ventricular assist devices, as well as to teaching residents and fellows. He is an active researcher in the areas of echocardiography and ventricular assist devices as destination therapy, and is a member of the American College of Cardiology, Heart Failure Society of America and the International Society of Heart and Lung Transplantation.