the left ventricle: what and how should we quantify its
TRANSCRIPT
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Roberto M. Lang, MD
The Left Ventricle: What and How Should
WE Quantify its Size and Function
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J AM Soc Echocardiogr 2005; 18:1440-1463
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• Approximately 5500 citations
iASE in iTUNE
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RT3DE
Database
Deformation Imaging
Cardiac Chamber Quantification: What is
New?
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J Am Soc Echocardiogr 2015;28:1-39Eur Heart J Cardiovasc Imaging. 2015 Mar;16(3):233-71.
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Partition Values for Severity of Abnormalities
• Cutoffs based on SD– Data readily exist– Echo parameters are not normally distributed– Asymmetric distribution
• Cutoffs based on percentile values (95th) • Cutoffs based on outcomes or prognosis• Cutoffs based on consensus• LV EF, LA, LA size and LV mass
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Normal Reference Values for 2DE
• Seven data bases (Asklepios, Flemengho, Cardia5, Cardia 25, Padua 3D Echo Normal, NorreStudy)
• No contrast studies• Age, gender, ethnicity, height and weight• Nl BP, no diabetes, nl BMI, creatinine,
glomerular filtration rate, cholesterol, LDL and triglicerides
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Left Ventricle and Left Atrium
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Subjective Experience dependent Lack of standardization Large inter- and intra-observer variability
Qualitative
Assessment
Eye ballHow do we Assess LV
Function ?
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Left Ventricular Linear Measurement
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TEICHHOLZ Formula
Left Ventricular Volumetric Measurement
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Left Ventricular Volumetric Measurement
Biplane Disk Summation
Area Length Method
1
2
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Normal Mild Moderate Severe
2015 >52 51-41 40-30 <302005 >55 54-45 44-30 <30
Left Ventricular Ejection Fraction
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Normal Mildly Moderately Severely
LVEF 52-72 41-51 30-40 <30
Normal Mildly Moderately Severely
LVEF 54-74 41-53 30-40 <30
Female
Male
LV Ejection Fraction
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3
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Which of the following is not an advantage of 3D echo for the
calculations of LV Volumes
1. Avoids image foreshortening2. No geometric assumptions3. More accurate and reproducible4. High temporal resolution
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LV Volumes: 3DE
Disadvantages• Low temporal
resolution• Less data on
normals
Advantages• Avoid image
foreshortening• No geometric
assumptions• More accurate and
reproducible
✓
✗
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LV Global Longitudinal Strain
Peak GLS in the range of -20% can be expected in a healthy person
Low Flow AS Cardio-oncology Valvular
Regurgitation
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LV Global Longitudinal Strain
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LV Segmentation: Regional Deformation
• Quantitative assessment of the magnitude of regional LV deformation is not recommended – lack of reference values – suboptimal
reproducibility– considerable inter-
vendor measurement variability
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LA Linear Dimension
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LA Volume
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LA Volume
Biplane Simpson’s Rule
Biplane Area-Length
3D Echo
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The normal values of LA volume for the 2015
guidelines are?1. 16-28 ml/BSA2. 29-33 ml/BSA3. 16-34 ml/BSA4. 42-48 ml/BSA
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34
Normal Mildly Moderately Severely
LA Vol/BSA 16-34 35-41 42-48 >48
Normal Mildly Moderately Severely
LA Vol/BSA 16-28 29-33 34-39 >40
LA Volume
Lang RM et al; J Am Soc Echocardiogr 2015; 28:1-39
Lang RM et al; J Am Soc Echocardiogr 2005; 18:1440-1463
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Aorta
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NCC LCC
Aortic Annulus Measurements
When: mid-systole: slightly larger and rounder Where: mid right coronary cusp and the edge of the commissures between the LCC and NCC from inner edge to inner edge
RCC
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• Sinuses of Valsalva (End-diastole)
• Sino-tubular junction (End-diastole)
• Maximal diameter of the proximal Asc Ao (End-diastole)
Leading edge to leading edge
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Aortic Root Measurements(Sinus of Valsalva)
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RV Ventricle and Right Atrium
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Lang RM, Badano LP et al Eur Heart J Cardiovasc Imaging 2015
What We Actually Measure by 2D Echo …
3DE For Assessing the Right Ventricle
Variable RV/RA size, shape and function
Apical 4-chamber
Larger RV minor dimension in the basal
segment
RV Focused Apical 4-Chamber
Lateral RV wall, RV maximal longitudinal
distance
RV Modified Apical 4-chamber
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33±4mm
27±4mm
25±2mm
28±3.5mm
22±2.5mm
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3±1
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24±3.5, mm
14.1±2.3, cm/s
-29±4.5, %
<17, mm
>-20, %
<9.5, cm/s
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RV Volumes from 3D Echocardiography
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RV Volumes and EF
RV EF % 58±6.5
<45
RV EDV/BSA, Men 61.3±13 35-87RV EDV/BSA, Women 53±10.5 32-74
RV ESV/BSA, Men 27±8.5 10-44RV ESV/BSA, Women 22±7 8-36
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• Measure in subcostal view 1-2cm from RA junction• Collapsibility index and estimated RAP
– < 1.7 cm & 50% collapse ~RAP 0-5 mm Hg– >1.7cm & >50% collapse ~RAP 6-10 mm Hg– >1.7cm & <50% collapse ~RAP 10-15 mm Hg– >1.7cm with no collapse ~RAP 15+ mm Hg
– IVC <1.2 with complete collapse- dry
IVC
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Summary1. Reference ranges for left ventricular volumes
and ejection fraction as well as LA volumes have changed in the recent guidelines due to the use of large echo databases.
2. Left ventricular wall motion scoring has changed to a 4-grade system.
3. Three-dimensional echocardiography is recommended for measurement of left and right ventricular volumes if possible.
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4. If global longitudinal strain is being used to follow patients, it should be using the same vendors machine and analysis package.
Lang et al. Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults: An Update from the American Society of Echocardiography and the European Association of Cardiovascular Imaging. J Am. Soc. Echocardiogr. 2015;28:1-39.
http://asecho.org/wordpress/wp-content/uploads/2015/01/ChamberQuantification2015.pdf
Summary
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J AM Soc Echocardiogr 2005; 18:1440-1463