A new echocardiographic index to assess global left ventricular systolic function

David G. Skolnick, Douglas S. Segar, Stephen Sawada, Harvey Feigenbaum

Research output: Contribution to journalArticle

Abstract

Ejection fraction (EF) has become the accepted measurement of global left ventricular systolic function (LVSF). It is a good prognostic indicator and is familiar to most clinicians. Echocardiographic (echo) measurements of EF require apical views which frequently have myocardial dropout or are foreshortened. An alternative "eyeball" EF is totally subjective and qualitative. The goal of this study was to create a global systolic index (GSI) which used common parasternal measurements and was numerically similar to EF. Measurements used were 2D basal fractional shortening (FS), fractional area change (FAC) at the papillary muscle level and the abnormal apical segments when the ASE approved regional score index (RSI) was calculated. The formula used was FAC + FS/3 - the sum of the abnormal apical segments expressed as a percentage. Thus if 2 of the 4 apical segments were akinetic, 6% (2X3 for akinesis) would be subtracted from the combined % of FAC+ FS/3. FAC, FS, and RSI are independent indices of LVSF. FAC, which is the basis for the bullet formula for calculating EF and is commonly used to monitor LVSF, is the dominant value in GSI. FAC is numerically smaller than EF. The addition of FS/3 produces a number in a symmetrically contracting ventricle which approximates EF. FS is also independantly useful in assessing basal LVSF especially with regional disease. Since neither FAC nor FS evaluates the apex, abnormal apical segments from the RSI appropriately reduce the GSI value when apical segmental dysfunction exists. We retrospectively evaluated all patients from January 1992 to September 1996 who had MUGA scans and 2D echoes which were technically acceptable. All in-patient studies were within one week of each other. Outpatient studies were within two weeks. Of the 71 patients who were used in this study, the correlation between the MUGA EF and the echo GSI had an r value of 0.88. Three of the outliers were pretransplant patients with diffuse cardiomyopathy. EF was significantly higher than GSI. Two other outliers were patients with severe right ventricular hypertrophy. EF was significantly lower than GSI. With these few exceptions the correlation between the echo GSI and MUGA EF was excellent giving similar clinically relevant numbers. We conclude that echo GSI derived from 2D parasternal FS and FAC and apical segments from RSI provides a clinically relevant number comparable to MUGA EF.

Original languageEnglish
Pages (from-to)431
Number of pages1
JournalJournal of the American Society of Echocardiography
Volume10
Issue number4
StatePublished - 1997

Fingerprint

Left Ventricular Function
Right Ventricular Hypertrophy
Papillary Muscles
Cardiomyopathies
Outpatients

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

Cite this

A new echocardiographic index to assess global left ventricular systolic function. / Skolnick, David G.; Segar, Douglas S.; Sawada, Stephen; Feigenbaum, Harvey.

In: Journal of the American Society of Echocardiography, Vol. 10, No. 4, 1997, p. 431.

Research output: Contribution to journalArticle

@article{704a6918c8ee4ac5993f06b35f03c0ef,
title = "A new echocardiographic index to assess global left ventricular systolic function",
abstract = "Ejection fraction (EF) has become the accepted measurement of global left ventricular systolic function (LVSF). It is a good prognostic indicator and is familiar to most clinicians. Echocardiographic (echo) measurements of EF require apical views which frequently have myocardial dropout or are foreshortened. An alternative {"}eyeball{"} EF is totally subjective and qualitative. The goal of this study was to create a global systolic index (GSI) which used common parasternal measurements and was numerically similar to EF. Measurements used were 2D basal fractional shortening (FS), fractional area change (FAC) at the papillary muscle level and the abnormal apical segments when the ASE approved regional score index (RSI) was calculated. The formula used was FAC + FS/3 - the sum of the abnormal apical segments expressed as a percentage. Thus if 2 of the 4 apical segments were akinetic, 6{\%} (2X3 for akinesis) would be subtracted from the combined {\%} of FAC+ FS/3. FAC, FS, and RSI are independent indices of LVSF. FAC, which is the basis for the bullet formula for calculating EF and is commonly used to monitor LVSF, is the dominant value in GSI. FAC is numerically smaller than EF. The addition of FS/3 produces a number in a symmetrically contracting ventricle which approximates EF. FS is also independantly useful in assessing basal LVSF especially with regional disease. Since neither FAC nor FS evaluates the apex, abnormal apical segments from the RSI appropriately reduce the GSI value when apical segmental dysfunction exists. We retrospectively evaluated all patients from January 1992 to September 1996 who had MUGA scans and 2D echoes which were technically acceptable. All in-patient studies were within one week of each other. Outpatient studies were within two weeks. Of the 71 patients who were used in this study, the correlation between the MUGA EF and the echo GSI had an r value of 0.88. Three of the outliers were pretransplant patients with diffuse cardiomyopathy. EF was significantly higher than GSI. Two other outliers were patients with severe right ventricular hypertrophy. EF was significantly lower than GSI. With these few exceptions the correlation between the echo GSI and MUGA EF was excellent giving similar clinically relevant numbers. We conclude that echo GSI derived from 2D parasternal FS and FAC and apical segments from RSI provides a clinically relevant number comparable to MUGA EF.",
author = "Skolnick, {David G.} and Segar, {Douglas S.} and Stephen Sawada and Harvey Feigenbaum",
year = "1997",
language = "English",
volume = "10",
pages = "431",
journal = "Journal of the American Society of Echocardiography",
issn = "0894-7317",
publisher = "Mosby Inc.",
number = "4",

}

TY - JOUR

T1 - A new echocardiographic index to assess global left ventricular systolic function

AU - Skolnick, David G.

AU - Segar, Douglas S.

AU - Sawada, Stephen

AU - Feigenbaum, Harvey

PY - 1997

Y1 - 1997

N2 - Ejection fraction (EF) has become the accepted measurement of global left ventricular systolic function (LVSF). It is a good prognostic indicator and is familiar to most clinicians. Echocardiographic (echo) measurements of EF require apical views which frequently have myocardial dropout or are foreshortened. An alternative "eyeball" EF is totally subjective and qualitative. The goal of this study was to create a global systolic index (GSI) which used common parasternal measurements and was numerically similar to EF. Measurements used were 2D basal fractional shortening (FS), fractional area change (FAC) at the papillary muscle level and the abnormal apical segments when the ASE approved regional score index (RSI) was calculated. The formula used was FAC + FS/3 - the sum of the abnormal apical segments expressed as a percentage. Thus if 2 of the 4 apical segments were akinetic, 6% (2X3 for akinesis) would be subtracted from the combined % of FAC+ FS/3. FAC, FS, and RSI are independent indices of LVSF. FAC, which is the basis for the bullet formula for calculating EF and is commonly used to monitor LVSF, is the dominant value in GSI. FAC is numerically smaller than EF. The addition of FS/3 produces a number in a symmetrically contracting ventricle which approximates EF. FS is also independantly useful in assessing basal LVSF especially with regional disease. Since neither FAC nor FS evaluates the apex, abnormal apical segments from the RSI appropriately reduce the GSI value when apical segmental dysfunction exists. We retrospectively evaluated all patients from January 1992 to September 1996 who had MUGA scans and 2D echoes which were technically acceptable. All in-patient studies were within one week of each other. Outpatient studies were within two weeks. Of the 71 patients who were used in this study, the correlation between the MUGA EF and the echo GSI had an r value of 0.88. Three of the outliers were pretransplant patients with diffuse cardiomyopathy. EF was significantly higher than GSI. Two other outliers were patients with severe right ventricular hypertrophy. EF was significantly lower than GSI. With these few exceptions the correlation between the echo GSI and MUGA EF was excellent giving similar clinically relevant numbers. We conclude that echo GSI derived from 2D parasternal FS and FAC and apical segments from RSI provides a clinically relevant number comparable to MUGA EF.

AB - Ejection fraction (EF) has become the accepted measurement of global left ventricular systolic function (LVSF). It is a good prognostic indicator and is familiar to most clinicians. Echocardiographic (echo) measurements of EF require apical views which frequently have myocardial dropout or are foreshortened. An alternative "eyeball" EF is totally subjective and qualitative. The goal of this study was to create a global systolic index (GSI) which used common parasternal measurements and was numerically similar to EF. Measurements used were 2D basal fractional shortening (FS), fractional area change (FAC) at the papillary muscle level and the abnormal apical segments when the ASE approved regional score index (RSI) was calculated. The formula used was FAC + FS/3 - the sum of the abnormal apical segments expressed as a percentage. Thus if 2 of the 4 apical segments were akinetic, 6% (2X3 for akinesis) would be subtracted from the combined % of FAC+ FS/3. FAC, FS, and RSI are independent indices of LVSF. FAC, which is the basis for the bullet formula for calculating EF and is commonly used to monitor LVSF, is the dominant value in GSI. FAC is numerically smaller than EF. The addition of FS/3 produces a number in a symmetrically contracting ventricle which approximates EF. FS is also independantly useful in assessing basal LVSF especially with regional disease. Since neither FAC nor FS evaluates the apex, abnormal apical segments from the RSI appropriately reduce the GSI value when apical segmental dysfunction exists. We retrospectively evaluated all patients from January 1992 to September 1996 who had MUGA scans and 2D echoes which were technically acceptable. All in-patient studies were within one week of each other. Outpatient studies were within two weeks. Of the 71 patients who were used in this study, the correlation between the MUGA EF and the echo GSI had an r value of 0.88. Three of the outliers were pretransplant patients with diffuse cardiomyopathy. EF was significantly higher than GSI. Two other outliers were patients with severe right ventricular hypertrophy. EF was significantly lower than GSI. With these few exceptions the correlation between the echo GSI and MUGA EF was excellent giving similar clinically relevant numbers. We conclude that echo GSI derived from 2D parasternal FS and FAC and apical segments from RSI provides a clinically relevant number comparable to MUGA EF.

UR - http://www.scopus.com/inward/record.url?scp=33748821206&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33748821206&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:33748821206

VL - 10

SP - 431

JO - Journal of the American Society of Echocardiography

JF - Journal of the American Society of Echocardiography

SN - 0894-7317

IS - 4

ER -