Echo
Calculated Fields
In the Echo worksheet, the following fields are calculated automatically. These calculated values automatically update when any of the source values are changed. For values that can be calculated using multiple methods, the Priority column indicates the order in which those methods are applied.
Field | Source Values | Priority | Calculation Logic |
|---|---|---|---|
AV Index | LVOT Pk Vel AV Pk Vel | LVOT Pk Vel ÷ AV Pk Vel | |
AVA (Vmax) | LVOT Diam LVOT Pk Vel AV Pk Vel | [Pi × (LVOT Diam ÷ 2)2 × LVOT Pk Vel] ÷ AV Pk Vel | |
AVA (VTI) | LVOT Diam LVOT VTI AV VTI | [Pi × (LVOT Diam ÷ 2)2 × LVOT VTI] ÷ AV VTI Note: All units measured in cm. | |
EF | EDV ESV | LVEDV (BIPLANE) & LVESV (BIPLANE) LVEDV & LVESV LVIDd & LVIDs LVIDd (Mm) & LVIDs (Mm) | [(EDV-ESV) ÷ EDV] × 100 Note: For the last two priority sets, dimensions are converted to volume, as follows: EDV = [7 ÷ (2.4 + LVIDd)] × LVIDd3 ESV = [7 ÷ (2.4 + LVIDs)] × LVIDs |
LA / Ao | LA AoD | 2D M-mode | LA ÷ AoD |
Lateral E/e' | MV Pk E Vel Lateral e' | MV Pk E Vel ÷ Lateral e' | |
LV FS (mid-wall) | LVIDd LVIDs | 2D M-mode | [(LVIDd - LVIDs) ÷ LVIDd] × 100 |
LV Mass | LVIDd LVPWd IVSd | M-mode 2D
| [0.8 × (1.04 × [(LVIDd + LVPWd + IVSd)3 - LVIDd3] )] + 0.6 |
LV Mass (AL) | LV Area Endo D LV Area Epi D LV Length D | 1.05 × [5/6(LV Area Epi D × LengthEpi) - (LV Area Endo D × LV Length D)] LengthEpi = LV Area Epi D × [LV Length D + √(LV Area Epi D ÷ Pi) - √(LV Area Endo D ÷ Pi)] | |
LVCI | LVCO BSA | LVCO ÷ BSA | |
LVCO | Heart rate LVSV | (LVSV × Heart rate) ÷ 1000 | |
LVOT CO | LVOT SV Heart rate | (LVOT SV × Heart rate) ÷ 1000 | |
LVOT SV | LVOT VTI LVOT Diam | Pi × (LVOT Diam ÷ 2)2 × (LVOT VTI) | |
LVRWT | LVPWd LVIDd | 2D M-mode | (2 × LVPWd) ÷ LVIDd |
LVSV | LVEDV LVESV | 2D M-mode | LVEDV (BIPLANE) - LVESV (BIPLANE) OR LVEDV - LVESV |
MV E/A Ratio | MV Pk A Vel MV Pk E Vel | MV Pk E Vel ÷ MV Pk A Vel | |
MV E/e' | MV Pk E Vel Lateral e' Septal e' | (2 × MV Pk E Vel) ÷ (Septal e' + Lateral e') | |
MVA | MV PHT | 220 ÷ MV PHT | |
RV FAC | RV Area ED RV Area ES | 100 × (RV Area ED - RV Area ES) ÷ RV Area ED | |
RVSP | TR Pk Vel RAP | 4(V)2 + RAP V= TR Pk Vel in units m/s | |
Septal E/e' | MV Pk E Vel Septal e' | (MV Pk E Vel) ÷ Septal e' |
Studycast Advisor for Echo
In the Echo worksheet, the Studycast Advisor provides helpful recommendations for setting observations when key measurements fall outside the acceptable ranges defined by published criteria.
When the Advisor has recommendations, the indicator in the top right corner is illuminated and the number of recommendations is displayed.
To view the recommendations, click the Advisor indicator.
In the Studycast Advisor window, all recommendations are selected by default. Uncheck the box for any recommendation you do not want to apply.
For information about the published guidelines used for a recommendation, roll the cursor over the question mark icon. |
When you click Apply, the relevant worksheet observations are updated based on the selected recommendations.
If, prior to opening Studycast Advisor, free text findings have been added in the relevant findings section, the Edit Advisor Findings window will open. This window allows you to edit individual findings statements impacted by the Advisor recommendations.
The After recommendation column shows how findings will appear if you choose to apply the recommendations.
•Statements that appear in red will be removed if the recommendations are applied.
•Statements appearing in blue will not be impacted by the recommendations, and will remain the same after the recommendations are applied.
•Statements appearing in green will be the new statements added based on the recommendations, if you choose to apply them.
To prevent an individual findings statement from being replaced, click the plus sign (+) next to the statement. The statement changes from red to blue.
|
To regenerate all findings based on the Advisor recommendations, click Apply and Close.
If you do not want the findings to be regenerated based on the Advisor recommendations, click Skip Statement Regeneration.
Pediatric Z-Scores
In the Echo worksheet, the Pediatric protocol includes z-scores, which are calculated automatically. These values update automatically when the source values are changed.
Note: Some of the fields in the table below can be configured to use an alternate source. If you would like to personalize your worksheet configuration, contact Studycast support. |
Field | Tab | Default Source | Other Source Available |
|---|---|---|---|
LA (Mm) Z-Score | Atria | M-mode Z-Scores (C Kampmann, C Wiethoff, A Wenzel, et. al.) | None |
LAs (A4C) Z-Score | Atria | Boston Group: Left Atrium Regression: 2D LA Apical 4ch Long Axis Dimension vs BSA | Boston Group: Left Atrium Regression: 2D LA Apical 4ch Transverse Dimension vs BSA |
LAs (A2C) Z-Score | Atria | Boston Group: Left Atrium Regression: 2D LA Apical 2ch Long Axis Dimension vs BSA | Boston Group: Left Atrium Regression: 2D LA Apical 2ch Anterior Posterior Dimension vs BSA |
LV Mass (Mm) Z-Score | Vents | Boston Group: M-mode LV dimensions Regression: MM LV Mass (Devereux) vs BSA | None |
IVSd Z-Score | Vents | Boston Group: 2D LV dimensions Regression: 2D LV End-diastolic Septal Thickness vs BSA | None |
IVSd (Mm) Z-Score | Vents | Boston Group: M-mode LV dimensions Regression: MM LV End-diastolic Septal Thickness vs BSA | M-mode Z-Scores (C Kampmann, C Wiethoff, A Wenzel, et. al.) |
LVPWd Z-Score | Vents | Boston Group: 2D LV dimensions Regression: 2D LV End-diastolic Free Wall Thickness vs BSA | None |
LVPWd (Mm) Z-Score | Vents | Boston Group: M-mode LV dimensions Regression: MM LV End-diastolic Free Wall Thickness vs BSA | M-mode Z-Scores (C Kampmann, C Wiethoff, A Wenzel, et. al.) |
LVIDd Z-Score | Vents | Boston Group: 2D LV dimensions Regression: 2D LV End-diastolic Dimension vs BSA | None |
LVIDd (Mm) Z-Score | Vents | Boston Group: M-mode LV dimensions Regression: MM LV End-diastolic Dimension vs BSA | M-mode Z-Scores (C Kampmann, C Wiethoff, A Wenzel, et. al.) |
LVIDs Z-Score | Vents | Boston Group: 2D LV dimensions Regression: 2D LV End-systolic Dimension vs BSA | None |
LVIDs (Mm) Z-Score | Vents | Boston Group: M-mode LV dimensions Regression: MM LV End-systolic Dimension vs BSA | M-mode Z-Scores (C Kampmann, C Wiethoff, A Wenzel, et. al.) |
RVIDd (Mm) Z-Score | Vents | M-mode Z-Scores (C Kampmann, C Wiethoff, A Wenzel, et. al.) | None |
AoD Annulus Z-Score | Grt Ves | Boston Group: Aorta Regression: Aortic annulus diameter vs BSA | Aortic Root Z-Scores (Colan SD, McElhinney DB, Crawford EC, et. al.) |
AoD SOV Z-Score | Grt Ves | Aortic Root Z-Scores (Colan SD, McElhinney DB, Crawford EC, et. al.) | None |
AoD ST Junction Z-Score | Grt Ves | Boston Group: Aorta Regression: Aortic sinotubular junction vs BSA | None |
AoD Ascending (Prox) Z-Score | Grt Ves | Boston Group: Aorta Regression: Ascending aorta diameter vs BSA | None |
AoD Descending Z-Score | Grt Ves | Cardiac Structure Z-Scores (M Pettersen, W Du, M Skeens, et. al.) | None |
Dist AoD Arch Z-Score | Grt Ves | Boston Group: Aorta Regression: Distal transverse aortic arch diameter vs BSA | None |
PA Diameter Z-Score | Grt Ves | Boston Group: Pulmonary valve and arteries Regression: Main pulmonary artery diameter vs BSA | None |
RPA Diameter Z-Score | Grt Ves | Boston Group: Pulmonary valve and arteries Regression: Right pulmonary artery diameter vs BSA | None |
LPA Diameter Z-Score | Grt Ves | Boston Group: Pulmonary valve and arteries Regression: Left pulmonary artery diameter vs BSA | None |
AoD Isthmus Z-Score | Grt Ves | Boston Group: Aorta Regression: Aortic Isthmus Diameter vs BSA | None |
LMCA Z-Score | Cor Art | Boston Group: Coronary Artery Regression: Left main coronary diameter vs BSA | None |
LAD Z-Score | Cor Art | Boston Group: Coronary Artery Regression: Proximal left anterior descending diameter vs BSA | None |
RCA Z-Score | Cor Art | Boston Group: Coronary Artery Regression: Proximal right coronary diameter vs BSA | None |
Cx Z-Score | Cor Art | Coronary Artery Z-Scores (Dallaire F, Dahdah N.) | None |
TV Annulus Z-Score | AV Valve | Boston Group: Tricuspid Valve Regression: Tricuspid annulus diameter (4 chamber) vs BSA | Boston Group: Tricuspid Valve Regression: Tricuspid annulus diameter (2 chamber) vs BSA |
MV Annulus Z-Score | AV Valve | Boston Group: Mitral Valve Regression: Mitral annulus diameter (4 chamber) vs BSA | Boston Group: Mitral Valve Regression: Mitral annulus diameter (2 chamber) vs BSA |
PV Annulus Z-Score | SL Valves | Boston Group: Pulmonary Valve and Arteries Regression: Pulmonary annulus diameter vs BSA | None |
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