Presentation on theme: "Preoperative Echocardiographic Clues For Repair of Degenerative Mitral Valve and Intraoperative Decision Making."— Presentation transcript:
Preoperative Echocardiographic Clues For Repair of Degenerative Mitral Valve and Intraoperative Decision Making
National repair rates generally approximate less than 60% of operated patients (degenerative mitral regurgitation), despite guideline recommendations-USA İn Turkey?
The Echocardiographer’s Role in Mitral Surgery Prereferral echocardiographic assessment plays a pivotal role in directing patients Careful echocardiographic assessment “road map for the repair strategy” appropriate matching of surgical expertise to degenerative valve complexity Experienced Surgeon Mitral Super-specialists
Carpentier’s Functional Classification Type I Leaflet Perforation/Annular Dilation Type II Excessive Leaflet Mobility-DMR TypeIIIaRestrictive Leaflet Motion-Systole/Diastole-RMR Type IIIbRestrictive Leaflet Motion-Systole-FMR
Degenerative Mitral Valve Disease Degenerative mitral valve disease is the most common etiology of MR Affects relatively healthy individuals Natural history is insidious Repair (not replacement) is the surgical treatment of choice The restoration of life expectancy can be expected
Degenerative Mitral Valve Disease Morphologic changes in the connective tissue of the mitral valve Structural Lesions (chordal elongation, chordal rupture, leaflet tissue expansion, annular dilation) Leaflet Prolapse MR
Echocardiography Precise morphologic assessment is necessary to predict the rates of successful reconstructive valve surgery Preop TTE-TEE Periop TEE 3D imaging Quantification of mitral regurgitation severity PAP, LV size, LV function
Echocardiography The echocardiographic report should provide clues on the likelihood of the valve repair
Echocardiography ACC-AHA-2006 ESC-2012 Experienced surgical centers!! Proper differentiation of the degenerative disease!! (critical step)
Echocardiography Studying the Preoperative Echocardiogram/Clinical Senario (experienced surgeon and cardiologist) (speaking common language) Etiology and Lesions Mental Plan (Surgeon) Incision type? Technique? Cross-clamp time?
Echocardiography “road map for the repair strategy” Barlow’s disease with bileaflet multi-segmental prolapse and annular calcification (complex) Median sternotomy/larger lateral thoracotomy-posterior leaflet resection, sliding leaflet plasty, annular decalcification, chordal transfer/substitution, papillary muscle sliding, and large-ring annuloplasty Simple P2 prolapse Minimally invasive approache-posterior leaflet resection, ring annuloplasty
Quantification of MR Color Flow Jet Area Lancellotti p.
Pulmonary Artery Pressure MedikalPostoperative PASP >50 mm Hg
ERO ≥ 0.4 cm² and/or RV ≥ 60 mL EF >60% and ESD <40 mm Watchful waiting? Early Surgery? Echocardiographic predictors of postop LV dysfunction? Asymptomatic Severe MR
Risk Factors for Post-op LV Dysfunction in Asymptomatic Organic MR Chordal rupture Massive MR (RVol >100 mL and ERO >0.5 cm²) ESD 37-39 mm, or >22 mm/m² in small patients Age >55 AF/Pulmonary Hypertension BNP >105 pg/mL Unfavourable exercise echocardiography findings Michelena HI, Rev Esp Cardiol. 2010 ???
Exercise Echocardiography in DMR Magne J, et al
3D-TEE Three-dimensional TEE was more accurate (92%–100%) than 2D TEE (80%–96%) in identifying prolapsed segments¹. Three-dimensional TEE was more accurate (96.5%) than 2D TEE (70%) in identifying >1 segment or commissural prolapsus². 1.Biaggi P, JASE, 2012 2.Canna LG,AJC,2011
3D-TEE The diagnosis of leaflet prolapse is made on the basis of the measurement of leaflet-tip displacement above the highest point of the nonplanar, saddle-shaped annulus. Secondary, nondominant prolapses, which are often missed using 2D ‑ echocardiography, can be detected, since their surgical correction is likely to reduce the occurrence of late postoperative MR.
3D-TEE Anterior Posterior De Bonis M, Nat Rev Cardiol-2012
Predictors of Successful Repair Freedom from recurrence of non-trivial degrees of regurgitation (>1/4): 94.31.6% at 1 month 58.64.9% at 5 years 27.28.6% at 7 years Freedom from failing repair (regurgitation>2/4): 98.30.9% at 1 month 82.83.8% at 5 years 71.17.4% at 7 years Flameng W, Circulation 2003
Predictors of Unsuccessful Repair Anatomic predictors of lower likelihood of repair are: Involvement of the anterior leaflet Involvement of ≥3 segments Posterior leaflet height Extent of mitral annular disease (Barlow) (Anulus>50 mm) Extensive annular calcification Severe central jet
Predictors of Unsuccessful Repair Iglesias I,SCVA-2007
Post-Repair Assessment- Intraoperatif TEE Real-time cardiovascular diagnosis Surgical decision-making
Post-Repair Assessment-Intraoperatif TEE Residual mitral regurgitation Segmental assessment of the coaptation surface (including commissures) Depth of coaptation should be at least 5 mm (LVOT view-systole) Mitral stenosis-Mean gradient >5 mm Hg Aortic regurgitation (stitch taken through AML close to LCC or NCC) Cx artery occlusion (stitch taken close to AL commissure) severe LV dysfunction LV and/or RV failure
Post-Repair Assessment-Intraoperatif TEE Common causes of a residual leak (other than trivial to mild regurgitation): Uncorrected segmental prolapse or restriction Residual restricted leaflet indentation Incorrectly sized or positioned ring that distorts the coaptation zone Ring dehiscence Perforation of the leaflet from an annuloplasty suture Defect in a leaflet closure line Systolic anterior movement (SAM)
Post-Repair Assessment- Intraoperatif TEE Any significant degree of mitral valve regurgitation (other than trivial to mild regurgitation) should prompt a return to cardiopulmonary bypass and valve re- exploration to correct residual or new defects!!!
Systolic Anterior Motion (SAM) Dynamic movement of the mitral valve anteriorly towards the LVOT during systole Clinically silent severe LVOTO with haemodynamic compromise
Systolic Anterior Motion (SAM) Post-operative (mitral) incidence is 1 - 16% Cause of late valve failure in 2 - 7% of patients after mitral valve repair
Factors predisposing to SAM Ibrahim M., et al. EJTS-2012
Factors predisposing to SAM-Preop Excessive anterior or posterior leaflet tissue Mitral–aortic angle of <120° Increased AML (35 mm) or PML (15 mm) length AML length/PML length <1.3 (systolic) AML+PML >MV anulus+15 mm C-Septal distance <2.5 cm Excess tissue with respect to the annulus Bulging subaortic septum (IVS> 15 mm) Nondilated, small left ventricle (EDD <45mm)
Factors predisposing to SAM-Postop Disruption of mitral annular and aortic root dynamics (rigid rings) Annular undersizing (small ring) Persistant AML redundancy Excessive PML resection Tachycardia, excess of inotropes Hypovolemia, hypotension RV failure, ventricular pacing
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