Navigation Links
Catheter repair of mitral valve improves heart size, symptoms
Date:4/1/2008

CHICAGO, Ill. (April 1, 2008) A catheter-mounted device that acts like a clothespin to clip together the flaps of a leaky heart valve is not only reducing the abnormal backflow of blood from the left ventricle to the left atrium, it is helping to shrink the enlarged, overworked heart and relieving symptoms of fluid overloadall without open-chest surgery. These are the one-year findings in a small group of patients enrolled in the Endovascular Valve Edge-to-Edge Repair Study (EVEREST), which is evaluating the use of the MitraClip for the treatment of mitral regurgitation (MR).

The sub-analysis is being reported today in a Late-Breaking Clinical Trials session at the SCAI Annual Scientific Sessions in Partnership with ACC i2 Summit (SCAI-ACCi2) in Chicago. SCAI-ACCi2 is a scientific meeting for practicing cardiovascular interventionalists sponsored by the Society for Cardiovascular Angiography and Interventions (SCAI) in partnership with the American College of Cardiology (ACC).

One trouble with mitral regurgitation is that the heart has to work harder, and over time, it dilates and enlarges, said James Hermiller, MD, director of the interventional fellowship at St. Vincent Heart Center of Indiana in Indianapolis. Demonstrating that the left ventricular enlargement is actually reversing itself is important objective evidence that the heart is responding favorably. It confirms that theres something real here.

Mounted on the end of a catheter, the MitraClip is threaded through the femoral vein in the groin and into the right atrium. A needle puncture in the wall separating the upper chambers of the heart enables the catheter to pass into the left atrium, where the clip is opened up like a clothespin. It is then passed through the mitral valve into the left ventricle. When the heart contracts, the flaps of the mitral valve are grasped by the clip, which is then closed, securing the edges of the valve flaps together at their centers. The result is a bow-tie-shaped opening that permits blood flow from the left atrium to the left ventricle during relaxation of the heart, and enables the valve flaps to close more effectively during contraction, rather than allowing leakage of blood backward into the left atrium.

The study by Dr. Hermiller and his colleagues focused on 23 patients treated at 15 medical centers either during the EVEREST I study or during the roll-in phase of the ongoing EVEREST II study, which is comparing MitraClip therapy to open-chest surgery. All of the patients in the new analysis had functional MR, which results not from a defect in the valve leaflets but from enlargement of the valve opening as a result of heart attack or heart failure. Of the quarter-million people newly diagnosed with mitral regurgitation in the United States each year, as many as two-thirds have the functional form, but it hasnt been clear whether the MitraClip would work as well in functional MR as in degenerative MR.

Before the procedure, all patients had moderately severe or severe mitral regurgitation, and 83 percent of patients had heart failure ranked as New York Heart Association (NYHA) functional class III or IV, which is characterized by lung congestion, shortness of breath, fatigue, swelling of the legs, and difficulty with light-to-moderate physical activity. After the procedure, mitral regurgitation was mild to modest in 19 of 22 patients (83 percent) treated with the MitraClip.

After one year, 12 patients had completed follow-up and had matched data from both baseline and follow-up. Ten of the 12 patients (83 percent) continued to have only mild to modest mitral regurgitation and nine of 12 (75 percent) continued to enjoy an improvement in symptoms and daily function of at least one NYHA class. In addition, heart size was significantly smaller. For example, the left ventricular internal diameter during relaxation, or diastole, fell from an average of 6.0 cm at baseline to 5.4 cm at 12 months (p=0.037), and left ventricular end-diastolic volume fell from an average of 208 mL at baseline to 178 mL at 12 months (p=0.037).

This is a small study, but it demonstrates a proof of principle that the MitraClip can reduce mitral regurgitation and improve heart function in patients with functional MR, Dr. Hermiller said. These findings are promising and interesting, but clearly we need a lot more data.

Dr. Hermiller will present the results of this study on Tuesday, April 1 at 10:30 a.m. CDT in the Grand Ballroom, S100.


'/>"/>

Contact: Kathy Boyd David
pr@scai.org
717-422-1181
Weber Shandwick Worldwide
Source:Eurekalert

Related medicine news :

1. Led by Cardiovascular Applications, Double Digit Growth Expected for Catheter Sales
2. St. Davids Medical Center First in Texas to Implement Visually Guided Catheter Ablation for Atrial Fibrillation
3. Balloon catheter-based sinus surgery radiation exposure very low, safe
4. Nerites Receives NIH Grant to Study Novel Treatment for Preventing Dangerous Bacterial Infections on Urinary Stents and Catheters
5. Catheter chaos: Hospitals lag in preventing common infection
6. Massive necrosis after trans-catheter treatment is more common in the presence of tumor capsule
7. Catheter angiography may be an unnecessary follow-up to CT angiography
8. Edwards Lifesciences Receives CE Mark for Edwards SAPIEN Transcatheter Heart Valve
9. NYC-area 1st: Morgan Stanley Childrens Hospital performs transcatheter pulmonary valve replacement
10. Wildcat Power Cord Repairs Cruciate Ligament in Dairy Cows Knee
11. Correction: Evalve Announces CE Mark Approval of the Worlds First Percutaneous Valve Repair System
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/27/2016)... ... June 27, 2016 , ... "FCPX editors can now reveal their ... Cut Pro X," said Christina Austin - CEO of Pixel Film Studios. , ... Pro X users can now reveal the media of their split screens with ...
(Date:6/26/2016)... ... 27, 2016 , ... Quality metrics are proliferating in cancer care, and are ... the eye of the beholder, according to experts who offered insights and commentary in ... Managed Care. For the full issue, click here . , For the American ...
(Date:6/26/2016)... Birmingham, Lake Orion, Clarkston, Michigan (PRWEB) , ... ... ... their direction with respect to fertility once they have been diagnosed with endometriosis. ... for tolerable intercourse but they also require a comprehensive approach that can help ...
(Date:6/25/2016)... ... June 25, 2016 , ... First Choice Emergency Room ... Dr. Sesan Ogunleye, as the Medical Director of its new Mesquite-Samuell Farm facility. ... of our new Mesquite location,” said Dr. James M. Muzzarelli, Executive Medical Director of ...
(Date:6/24/2016)... Angeles, CA (PRWEB) , ... June 24, 2016 , ... ... surgery procedures that most people are unfamiliar with. The article goes on to state ... procedures, but also many of these less common operations such as calf and cheek ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... 2016 Research and Markets has ... by Type (Organic Chemical (Sugar, Petrochemical, Glycerin), Inorganic Chemical), ... Parenteral) - Global Forecast to 2021" report to ... The global pharmaceutical excipients market is projected to reach ... 6.1% in the forecast period 2016 to 2021. ...
(Date:6/23/2016)... DUBLIN , June 23, 2016 ... "Global MEMS Devices Medical Market Analysis 2016 - Forecast to ... The report contains up to date financial ... reliable analysis. Assessment of major trends with potential impact on ... dive analysis of market segmentation which comprises of sub markets, ...
(Date:6/23/2016)... June 23, 2016 Bracket , a leading ... next generation clinical outcomes platform, Bracket eCOA (SM) 6.0, ... June 26 – 30, 2016 in Philadelphia ... Clinical Outcome Assessment product of its kind to fully integrate ... Bracket eCOA 6.0 is a flexible platform for electronic ...
Breaking Medicine Technology: