Professors Carpentier and McGoon/media/Non-Clinical/Files-PDFs-Excel...CP1293058-3 Professors...
Transcript of Professors Carpentier and McGoon/media/Non-Clinical/Files-PDFs-Excel...CP1293058-3 Professors...
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CP1293058-3
Professors Carpentier and McGoon
• Mechanism, resulting from the disease
• Severity of regurgitation, resulting from the mechanism
• Echo define the mechanism, quantify the regurgitation severity
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• Primary / organic
Myxomatous / MVP, fibroelastic deficiency, MAC, rheumatic, IE, congenital
• Secondary
IMR, Dilated CMP, HCM
• Other
Systemic disease, drugs, trauma
CP1293058-4
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Echo Diagnosis
• PLAX view
• > 2mm systolic displacement of one / both leaflets into LA below plane of mitral annulus
• More specific if leaflets are thickened > 5mm (myxomatous)
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Mitral Valve ProlapseEcho Diagnosis
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Mitral RegurgitationTenting Area
Tenting area > 6 cm2 ~ > mod-severe MR
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CP1293058-8
Mitral Valve MechanismsOrganic
Functional
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CP1293058-9
ORGANIC
Excess tissue / length
Triangular resection
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CP1293058-10
Functional
Ischemic
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CP1293058-11
Mitral Valve MechanismsOrganic
Functional
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12
MR Mechanism I
Normal Annulardilatation
Leafletperforation
CP1293058-12
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13
Flailleaflet
Leaflet prolapse/chordal elongation
MR Mechanism II
CP1293058-13
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14
Leaflet/choralretraction
Papillary muscle displacement
MR Mechanism
III
CP1293058-14
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CP1293058-15
Perform a comprehensive
assessment
=Use all the
information available
Regurgitation Severity Assessment
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CP1293058-16
J Am Soc Echocardiogr. 2003;16:777-802 Eur J Echocardiography 2003;4:237-261
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CP1293058-17
What Type of Information
• Specific signs
• Supportive signs
• Quantitative parametersERO: Severity of the lesion itself
RVol: Severity of the volume overload
RF: Severity of volume overload relative to the size of the ventricle
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MR Severity AssessmentApplication of specific and supportive signs, and quantitative
parameters in the grading of mitral regurgitation severity
Mild Moderate Severe
Specific signs for MR severity
Small central jet <4 cm2
or <20% of LA area
Vena contracta <0.3 cm
No or minimal flow convergence
Signs of MR > mild present but no criteria for severe AR
Vena contracta width >>0.7 cm with large central MR jet (area >40% of LA) or with a wall-impinging jet of any size, swirling in LA
Large flow convergence
Systolic reversal in pulmonary veins
Prominent flail MV leaflet or ruptured papillary muscle
Supportive signs
Systolic dominant flow in pulmonary veins
A-wave dominant mitral inflow
Soft density, parabolic CW Doppler MR signal
Normal LV size
Intermediate signs/ findings
Dense, triangular CW Doppler MR jet
E-wave dominant mitral inflow (E >1.2 m/s)
Enlarged LV and LA size
Quantitative parametersR vol (mL/beat)RF (%)EROA (cm2)
<30<30<0.20
30-4430-390.20-0.29
45-5940-490.30-0.39
≥60≥50≥0.40
CP1293058-18
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Anatomy of Regurgitant JetHead, Neck and Body
Head
Neck
Body
Define the 3 components of the regurgitant jet!CP1293058-19
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CP1293058-20
Mitral Regurgitation
Vena Contracta
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CP1293058-21
Vena Contracta
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Vena ContractaASE Guidelines
•< 0.3cm mild MR
•> 0.7cm severe MR
•Values in-between quantify!
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CP1293058-23
Proximal
I sovelocity
Surface
Area
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CP1293058-24
Behavior of Noncompressible Fluid Approaching Hole
CP1293058-24
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CP1293058-25
Hemisphere That Looks More Like a Circle
Hemisphere ∆ = 2Πr²
X
Velocity (aliasing V)
Flow before
the hole
First aliasing boundary
RA RA
Isovelocity contoursIsotachs
Lower velocity
Higher velocity Radius
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CP1293058-26
Eliciting a PISA Shell
MR Apical 4-C
Aliasing from blue to red
LV
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CP1293058-27
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CP1293058-28
Flow Before the Hole Calculation
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CP1293058-29
Instantaneous ERO Calculation
Flow = 294 mL/sec MR velocity = 557 cm/sec
ERO = flow/velocity = 0.53 cm2 or 53 mm2
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CP1293058-30
=
Flow before the hole
ERO
MR velocity
Mitral Regurgitation and PISA
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Quantitation of RegurgitationConcepts
EffectiveR orifice
R volume Volumeoverload
measures
Lesionseverity
measures
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If you cannot measure it you cannot
control it. — John Grebe
Whenever you can,
count.
— Sir Francis Galton
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MR Vmaxπ x r² x AvERO =
Rvol = ERO x MRTVI
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0.6 cm
1.5 cm
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CP1293058-60