Archived Policies - Surgery
Surgical Ventricular Restoration (SVR)
Surgical ventricular restoration (SVR) is considered experimental, investigational or unproven for patients with akinetic segments of the heart caused by ischemic dilated cardiomyopathy, or post-infarction left ventricular aneurysm, or any other etiology.
SVR is a procedure designed to restore or remodel the left ventricle to its normal, spherical shape and size in patients with akinetic (lack of muscle movement) segments of the heart, secondary to either dilated cardiomyopathy or post infarction left ventricular aneurysm. The SVR procedure is usually performed after coronary artery bypass grafting (CABG) and may precede or be followed by mitral valve repair or replacement, as well as other procedures such as endocardectomy and cryoablation for treatment of ventricular tachycardia (VT).
A key difference between SVR and ventriculectomy for aneurysm removal is that in SVR the ventricle is reconstructed using patches of autologous or artificial material, which are placed to close the defect while maintaining the desired ventricular volume and contour. Additionally, SVR is distinct from partial left ventriculectomy (PLV), known as the Batista procedure, which does not attempt to specifically resect akinetic segments and restore ventricular contour.
The SVR procedure may also be referred to as ventricular remodeling (VR), surgical anterior ventricular endocardial restoration (SAVER) or the Dor procedure named after Vincent Dor, M.D., who pioneered expansion of techniques for VR and is credited with treating congestive heart failure (CHF) patients with SVR in conjunction with CABG.
The CorRestore ™ Patch System is a device the U.S. Food and Drug Administration (FDA) approved through the 510(k) process that is specifically labeled for use “as an intracardiac patch for cardiac reconstruction and repair.” The device consists of an oval tissue patch made from glutaldehyde fixed bovine pericardium. It is identical to other marketed bovine pericardial patches except that it incorporates an integral suture bolster in the shape of a ring, which is used along with ventricular sizing devices, to restore the normal ventricular contour.
A review of the peer-reviewed literature on Medline through July 2005 revealed many publications on a variety of approaches to SVR. These publications consist primarily of case series reports and retrospective reviews from single centers with the exception of publications from the multi-centered RESTORE Group (Reconstructive Endoventricular Surgery, returning Torsion Original Radius Elliptical Shape to LV). The RESTORE Group is an international group of cardiologists and surgeons from 13 centers that has investigated SVR in over 1,000 patients with ischemic cardiomyopathy following anterior myocardial infarction (MI) in the past 20 years. The following discussion summarizes a representative sample of some of the reports on SVR.
Athanasuleas and colleagues from the RESTORE Group, reported on early and three-year outcomes on 332 patients who underwent SVR following anterior MI during the period of January 1998 to July 2000. In addition to SVR, 92% of the patients also concomitantly underwent CABG, 22% mitral valve repair, and 3% mitral valve replacement. The authors reported overall mortality during hospitalization was 7.7%. Postoperative ejection fractions increased from 29.7% ± 11.3% to 40.0% ± 12.3%. The survival rate and freedom from hospitalization for heart failure at three-years was 89.4% ± 1.3% and 88.7% respectfully. In a separate publication on 439 patients from the RESTORE Group, Athanasuleas, et al., reported outcomes improved in patients with lower patient age, higher ejection fractions and lack of need for mitral valve replacement.
Mickleborough, et al., reported on 285 patients who underwent SVR by a single surgeon for class III or IV CHF, angina or VT during the period of 1983 to 2002. In addition to SVR, 93% of the patients also concomitantly underwent CABG, 22% patch septoplasty, 41% arrhythmia ablation, 3% mitral valve repair, and 3% mitral valve replacement. SVR was performed on the beating heart in 7% of patients. The authors reported hospital mortality of 2.8%. Postoperative ejections fractions increased 10% ± 9% from 24% ± 11% and symptom class in 140 patients improved 1.3% ± 1.1% function class per patient. Patients were followed up for up to 19 years (mean of 63 ± 48 months) and overall actuarial survival was reported as 92%, 82%, and 62% at one-, five-, and ten-years respectfully. The authors suggested wall-thinning should be used as a criterion for patient selection.
Bolooki and colleagues reported on 157 patients that underwent SVR by a single surgeon for class III or IV CHF, angina, VT, or MI using three operative methods during the period of 1979 to 2000. SVR procedures consisted of radial aneurysm resection and linear closure (n=65), septal dyskinesis reinforced with patch septoplasty (n=70), or ventriculotomy closure with an intracavity oval patch (n=22). The authors reported hospital mortality of 16%. The mean preoperative ejection fraction was 28% ± 0.9%. Patients were followed up for up to 22 years and overall actuarial survival was reported as 53%, 30%, and 18% at five-, ten-, and 15-years respectively. The authors found factors improving long term survival included SVR with intraventricular patch repair and ejection fraction of 26% or greater preoperatively.
Sartipy, et al., reported on 101 patients who underwent SVR using the Dor procedure at a single center for class III or IV CHF, angina, and VT during the time period of 1994 to 2004. In addition to SVR, 98% of patients also concomitantly underwent CABG, 52% arrhythmia ablation, and 29% mitral valve procedure. The authors reported early mortality, within 30 days of surgery, was 7.9%. Left ventricular ejection fraction increased from 27% ± 9.9% to 33% ± 9.3% postoperatively. Patients were followed up 4.4 ± 2.8 years and overall actuarial survival was reported as 88%, 79%, and 65% at one-, three-, and five-years respectively.
While the SVR procedure has been performed for many years, the available data are inadequate to permit conclusions regarding health benefits associated with SVR. Specifically, the lack of any randomized controlled trials comparing SVR to other surgical or medical therapies does not permit scientific assessment of the efficacy of SVR. Additionally, patient selection criteria and optimal surgical techniques are still undetermined.
In January 2002, a randomized multicenter international clinical trial on the Surgical Treatment of Ischemic Heart Failure (STICH) was initiated to compare medical therapy with CABG and/or SVR for patients with CHF and coronary heart disease (CHD). The STICH trial is sponsored by the National Heart, Lung and Blood Institute and will recruit 2,800 patients with heart failure, left ventricular ejection fraction <0.35, and coronary artery disease (CAD) amenable to CABG at 50 clinical sites. Patients with extensive anterior ischemia assigned to the surgical arm of the study will be further randomized to CABG surgery alone versus bypass plus SVR. Completion of the trial is expected in December 2008.
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Athanasuleas, C.L., Stanley, A.W., et al. Surgical anterior ventricular endocardial restoration (SAVER) in their dilated remodeled ventricle after anterior myocardial infarction RESTORE group. (2001 April) 37(5): 1199-209.
Dor, V., Di Donato, M., et al. Left ventricular reconstruction by endovascular circular patch plasty repair: A 17-year experience. Seminars in Thoracic and Cardiovascular Surgery (2001 October) 13(4): 435-47.
Athanasuleas, C.L., Stanley, A.W., et al. Surgical anterior ventricular endocardial restoration (SAVER) for dilated ischemic cardiomyopathy. Seminars in Thoracic and Cardiovascular Surgery (2001 October) 13(4): 448-58.
Di Donato, M., Toso, A., et al. Intermediate survival and predictors of death after surgical ventricular restoration. (2001 October) 13(4): 468-75.
Di Donato, M., Sabatier, M., et al. Surgical ventricular restoration in patients with postinfarction coronary artery disease: Effectiveness on spontaneous and inducible ventricular tachycardia. Seminars in Thoracic and Cardiovascular Surgery (2001 October) 13(4): 480-5.
Menicanti, L. and M. Di Donato. Surgical ventricular reconstruction and mitral regurgitation: Whathave we learned from 10 years experience? Seminars in Thoracic and Cardiovascular Surgery (2001 October) 13(4): 496-503.
Menicanti, L., Di Donato, M., et al. Ischemic mitral regurgitation: Intraventricular papillary muscle imbrication without mitral ring during left ventricular restoration. Journal of Thoracic and Cardiovascular Surgery (2002 June) 123(6): 1041-50.
Bolooki, H., DeMarchena, E., et al. Factors affecting late survival after surgical remodeling of left ventricular aneurysms. Journal of Thoracic and Cardiovascular Surgery (2003 August) 126(2): 374-83.
Mickleborough, L.L., Merchant, N., et al. Left ventricular reconstruction: Early and late results. Journal of Thoracic and Cardiovascular Surgery (2004 July) 128(1): 27-37.
Sartipy, U., Albage, A., et al. The Dor procedure for left ventricular reconstruction. Ten-year clinical experience. European Journal of Cardio-Thoracic Surgery (2005 June) 27(6): 1005-10.
|Title:||Effective Date:||End Date:|
|Cardiac Restoration and Remodeling Procedures||10-01-2018||10-14-2019|
|Cardiac Restoration and Remodeling Procedures||07-15-2017||09-30-2018|
|Cardiac Restoration and Remodeling Procedures||07-15-2016||07-14-2017|
|Cardiac Restoration and Remodeling Procedures||11-01-2015||07-14-2016|
|Cardiac Restoration and Remodeling Procedures||04-15-2014||10-31-2015|
|Cardiac Restoration and Remodeling Procedures||03-01-2013||04-14-2014|
|Cardiac Restoration and Remodeling Procedures||11-15-2010||02-28-2013|
|Surgical Ventricular Restoration (SVR)||10-01-2008||11-14-2010|
|Partial Left Ventriculectomy (PLV)||06-01-2008||11-14-2010|
|Surgical Ventricular Restoration (SVR)||05-01-2006||09-30-2008|
|Surgical Ventricular Restoration (SVR)||01-01-2006||04-30-2006|