lev mendelevich md — trans catheter treatment of structural heart diseases
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Lev Mendelevich MD — Trans Catheter Treatment of Structural Heart DiseasesTRANSCRIPT
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Trans Catheter Treatment of Structural Heart Diseases
Tel Aviv Sourasky Medical Center
Lev Mendelevich MD
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Echocardiography in Trans Catheter
Treatment of Aortic Stenosis
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Aortic Valve Stenosis
Normal Aortic Valve Stenotic Aortic Valve
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Types of Aortic Stenosis
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Normal Aortic Valve
A normal aortic valve. Both parts were recorded during diastole. A: The long-axis view demonstrates the appearance of a typical normal aortic valve in the closed position. B: The same valve is demonstrated from the short-axis view. Note that, because of shadowing and lateral resolution, the coaptation line between left and noncoronary cusps is not visualized.
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Normal Aortic Valve
A normal aortic valve during diastole in the closed position (A) and during systole in the open position (B). Ao, aorta; LA, left atrium; LV, left ventricle; RV, right ventricle.
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Valvular Aortic Stenosis – 2 D-Echo
The cusps become thickened and restricted;
Their position is no longer parallel to the aortic walls;
The edges of the cusps point to toward the center of aorta;
No estimation of severity usually by 2 D-echo, but if one of the cusps moves normally – critical aortic stenosis is excluded;
Planimetry is possible on TEE and sometimes on TTE.
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A patient with mild aortic stenosis. LA, left atrium; LV, left ventricle; RV, right ventricle.
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A transesophageal echocardiogram demonstrates the method of direct planimetry of the aortic valve orifice. By carefully adjusting the level of the short-axis plane, the orifice can be visualized in most patients. In this example, severe stenosis was confirmed. AVA, aortic valve area;
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Aortic Stenosis – Two-dimensional Echo
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Aortic Stenosis Pressure Gradients
1. Peak instantaneous pressure gradient – ΔP (in mm Hg) = 4V²
V – maximal jet velocity (m/s).
2. Mean pressure gradient :
a. Planimetry of the Doppler envelope – VTI of AV velocity;
b. Another method by formula –
ΔPmean = ΔPmax/1.45 + 2 mm Hg
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Continuous
wave Doppler
Pressure gradient = 4 x V² = 4 x 5.4² = 117mmHg
Calculation of Aortic Pressure Gradient
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Schematic Diagram of Continuity Equation
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Guidelines for Grading Severity of Aortic
Valve Stenosis
Aortic valve area >1.5cm² (>0.9cm²/m²) – mild 1.0 -1.5cm² (0.6 – 0.9 cm²/m²) - moderate <1.0 (<0.6 cm²/m²) - severe Peak pressure gradient < 25mmHg - mild 25-64mmHg - moderate > 64mmHg - severe Peak jet velocity on CW Doppler < 2.5m/sec – mild 2.5-4.0 m/sec – moderate > 4.0m/sec -severe
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Echocardiographic Images of Aortic sclerosis (A, B) and Severe Aortic Stenosis (C, D)
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Elevated Pressure Gradient - Differential Diagnosis
Sub aortic membrane
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Elevated Pressure Gradient - Differential Diagnosis
Hypertrophic obstructive cardiomyopathy
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Valvular Heart Disease Disease Burden
Nkomo, et al.
Lancet 2006
Prevalence of moderate-severe aortic/mitral valve disease, n=11,091
<45 45-54 55-64 65-74 >74
MR 7.1%
MS 0.2% S 0.2%
AR 1.7%
AS 4.6%
MR 7.1%
AS 4.6%
AR 1.7%
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Operative Mortality for Aortic Valve Surgery
3 to 4 % for AVR
5.5 to 6.8 % for AVR + CABG
7 to 10 % in low volume centers
If > 65 yrs old – 8.8%;
13% in low volume centers
6% in high volume centers
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Aortic Valve Replacement
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Trans Catheter Aortic Valve Implantation
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Echocardiography in Trans Catheter Treatment of Mitral Regurgitation
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Mitral Valve
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Valves Anatomy
Superior view of the heart showing heart valve anatomy
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Normal Mitral Valve Anatomy and Opening
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Mitral Valve Annulus
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Mitral Valve Chordae
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Mitral Valve Commissures
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Mitral Valve Leaflets
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Coaptation Zone
On the atrial surface of the leaflets
exist two zones, one peripheral
smooth or body zone and one
central rough or coaptation zone.
The gently curved coaptation line
between the two leaflets evident
from an atrial view , separates these
two areas.
The rough zone represents the
coaptation surface of the valve.
The coaptation zone is critical to
valve competency, and the depth
and length of coaptation is viewed
as an important assessment of
mitral valve function.
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Papillary Muscles
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Mitral Regurgiatation
•
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Carpentier Classification
Carpentier’s functional classification
Type I, normal leaflet motion;
Type II, increased leaflet motion (leaflet prolapse);
Type IIIa restricted leaflet motion during diastole and systole;
Type IIIb restricted leaflet motion predominantly during systole
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Degenerative Mitral Valve Disease
Degenerative mitral valve disease A, Barlow’s disease B, fibroelastic deficiency
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Mitral regurgitation
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Severe MR – Continuous Wave Doppler
Mild MR Severe MR
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MR- Mitral Inflow Pulsed Doppler
Mild MR Severe MR
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Pulmonary Vein Flow
Normal Severe MR
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Mitral Regurgitation - Quantification
Proximal isovelocity surface area (PISA)
Vena contracta
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Mitral Regurgitation - Quantification
Flow convergence (PISA) Vena contracta
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Proximal Isovelocity Surface Area (PISA)
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MR - Effective Regurgitant Orifice (ERO)
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Mitral Regurgitation Severity
When to Consider Surgery
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Vena Contracta
Mild MR Severe MR
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Operative Mortality for Mitral Valve Surgery
4 to 5 % for MV replacement
2% for MV repair
• If > 80 yrs old +CABG +LV dysfunction or renal failure – 15%
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Trans Catheter Mitral Valve Repair By MitraClip
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MitraClipTM
קליף פתוח
קליף סגור
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Echocardiography in Trans Catheter
Treatment of Mitral Stenosis
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Severity of Mitral Stenosis
MVA (cm2) Mean (mm Hg)
Mild 1.6 - 2.0 < 5
Moderate 1.1 - 1.5 6-10
Severe 1.0 10
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Mitral Stenosis - Feasibility of Valvuloplasty
Valve pliable:
-Commissural calcification
- Wilkins/Abascal Score <8
Valve mobility 1-4
Valve Thickening 1-4
Valve Calcification 1-4
Sub-valvular thickening 1-4
MR <2+
No thrombus in LAA
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MS Score Index
Mobility
Leaflet thickening
Subvalvular thickening
Calcification
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MS Score Index Mobility
Grade 1 Highly mobile valve with leaflet tips only restricted
Grade 2 Leaflet mid and base portions have normal mobility
Grade 3 Valve continues to move forward in diastole, mainly
from the base
Grade 4 No or minimal forward movement from the leaflets
in diastole
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MS Score Index Leaflet Thickening
Grade 1 Leaflets near normal in thickness(4 to 5mm)
Grade 2 Mid-leaflets normal, marked thickening of
margins (5 to 8mm)
Grade 3 Thickening extending through the entire leaflet
(5 to 8mm)
Grade 4 Marked thickening of all leaflet tissue (>8mm)
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MS Score Index Subvalvular thickening
Grade 1 Minimal thickening just below mitral leaflets
Grade 2 Thickening of chordal structures extending up to
one-third of the chordal length
Grade 3 Thickening extending to the distal third of chords
Grade 4 Extensive thickening and shorting of all chordal
structures extending down to the papillary muscles
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MS Score Index Calcification
Grade 1 A single area of increased echo brightness
Grade 2 Scattered areas of brightness confined to leaflet
margins
Grade 3 Brightness extending into the mid-portion of the
leaflets
Grade 4 Extensive brightness throughout much of the
leaflet tissue
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MS Score Index Determining Echo Score
Add the grades from the four
categories.
Patients who score < 8
are more favorable
candidates for balloon
valvuloplasty
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Wilkins' Score and Increase in Valve Area
(NHLBI Register Circulation 1992; 85: 448-61)
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Inoue Balloon Metallic
Commissurotome
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