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The purpose of this study is to evaluate the immediately clinic and ultramicroscopic myocardial cellular ischemia and reperfusion to replace of the mitral valve using arrested heart versus on-pump empty beating heart surgical techniques.
During open-heart surgery prevention of ischemia and reperfusion following cardioplegic arrest are essential for myocardial protection. Beating heart surgery on normothermic bypass simulates physiologic cardiac status and is good method for myocardial protection. A comparison of both available techniques for valve replacement arrested heart versus on-pump empty beating heart of the clinical and ultramicroscopic myocardial alterations will allowed to better understand myocardial protection because eliminated the use of cardioplegia and the corollary risk of ischemic reperfusion injury.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Beating heart surgery | Experimental | Group A (Beating heart) surgery was performed under normal temperature (36⁰ C) ,once CPB was established, the patient was placed in Trendelenburg position and a retrograde perfusion catheter was inserted into the coronary sinus and ligated by a simple suture line. Aorta cross clamping was immediately established and blood was oxygenated and delivered continuously through a catheter Mitral valve was exposed using the left atrial retractor. Mitral valve replacement (MVR) was performed using a metallic or bioprostheses substitution by interrupted suture De Vegas' technique. |
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| heart surgery Group B | Active Comparator | Group B (arrested heart) surgery was performed under moderate hypothermia (32⁰C) as technique requirement (3). After cardiac arrest, during the period of cross clamping, the aortic root was perfused through the cardioplegias's cannula with oxygenated blood at a rate between 200 mL/min to 300 mL/min for 2 minutes with 15 minutes intervals.Mitral valve replacement (MVR) was performed using a metallic or bioprostheses substitution by interrupted suture De Vegas' technique. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Mitral valve replacement | Procedure | Mitral valve replacement (MVR) was performed using a metallic or bioprostheses substitution by interrupted suture. For the beating heart the prostheses was functionally tested before removal of the retrograde perfusion catheter and for the arrested heart the prosthesis was artificially tested by pumping saline into the left ventricle. The tricuspid valve repair was done following De Vegas' technique in both groups |
| Measure | Description | Time Frame |
|---|---|---|
| mitral valve replacement | Mitral valve replacement (MVR) was performed using a metallic or bioprostheses substitution by interrupted suture. For the beating heart the prostheses was functionally tested before removal of the retrograde perfusion catheter and for the arrested heart the prosthesis was artificially tested by pumping saline into the left ventricle. The tricuspid valve repair was done following De Vegas' technique in both groups with the beating heart also in the group B. | 1hour , 3 hours and 1 hour after surgery procedure |
| Measure | Description | Time Frame |
|---|---|---|
| Ultramicroscopic evidences of ischemia | During the surgery myocardial biopsies were performed as full thickness transmural specimen of three small fragments for electromicrospic analysis | 1hour, 3 hours and 1 hour after aortic clamping |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Hospital Ana Neri | Salvador | Estado de Bahia | 40.000 | Brazil |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 7065773 | Background | Schaper J, Schwarz F, Kittstein H, Stammler G, Winkler B, Scheld H, Hehrlein F. The effects of global ischemia and reperfusion on human myocardium: quantitative evaluation by electron microscopic morphometry. Ann Thorac Surg. 1982 Feb;33(2):116-22. doi: 10.1016/s0003-4975(10)61895-4. | |
| 21177299 | Background | Babaroglu S, Yay K, Parlar AI, Ates C, Mungan U, Cicekcioglu F, Tutun U, Katircioglu SF. Beating heart versus conventional mitral valve surgery. Interact Cardiovasc Thorac Surg. 2011 Mar;12(3):441-7. doi: 10.1510/icvts.2010.255240. Epub 2010 Dec 21. |
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| ID | Term |
|---|---|
| D008946 | Mitral Valve Stenosis |
| D008944 | Mitral Valve Insufficiency |
| ID | Term |
|---|---|
| D006349 | Heart Valve Diseases |
| D006331 | Heart Diseases |
| D002318 | Cardiovascular Diseases |
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| mitral valve replacement | Procedure | Mitral valve replacement (MVR) was performed using a metallic or bioprostheses substitution by interrupted suture. For the beating heart the prostheses was functionally tested before removal of the retrograde perfusion catheter and for the arrested heart the prosthesis was artificially tested by pumping saline into the left ventricle. The tricuspid valve repair was done following De Vegas' technique in both groups |
|
| 12220071 | Background | Kaplon RJ, Pham SM, Salerno TA. Beating-heart valvular surgery: a possible alternative for patients with severely compromised ventricular function. J Card Surg. 2002 Mar-Apr;17(2):170-2. doi: 10.1111/j.1540-8191.2002.tb01194.x. |
| 12238823 | Background | Matsumoto Y, Watanabe G, Endo M, Sasaki H, Kasashima F, Kosugi I. Efficacy and safety of on-pump beating heart surgery for valvular disease. Ann Thorac Surg. 2002 Sep;74(3):678-83. doi: 10.1016/s0003-4975(02)03753-0. |
| 20026547 | Background | Salhiyyah K, Taggart D. Beating-heart valve surgery: A systematic review. Asian Cardiovasc Thorac Ann. 2009 Dec;17(6):650-8. doi: 10.1177/0218492309348942. |
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