Discordant impairment of multidirectional myocardial deformation in rats with doxorubicin induced cardiomyopathy

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Abstract

Background: In doxorubicin-induced cardiomyopathy (DIC), the sequence of decrease in multidirectional myocardial deformation has not been clearly elucidated. Objectives: We investigated the sequence of myocardial deformations in rat DIC, using two-dimensional speckle tracking echocardiography (2DSTE). Methods: Twenty rats were treated with doxorubicin (1.25 mg/kg × 16 times, intraperitoneal) for 4 weeks and compared with nine control rats. Myocardial strain analysis with 2DSTE, as well as conventional echocardiography, was obtained. Results: Compared with baseline, longitudinal strain/strain rate (LS/LSr) decreased at week 2 (-15.7 ± 1.5 to -14.1 ± 1.4%, P = 0.01 for LS; -4.4 ± 0.7 to -3.9 ± 0.5 per second, P = 0.009 for LSr). Left ventricular ejection fraction (LVEF) and circumferential strain (CS) decreased at week 4 (80.3 ± 3.2 to 78.1 ± 3.3%, P = 0.031 for LVEF; -18.6 ± 1.9 to -15.0 ± 3.4%, P = 0.019 for CS). Circumferential strain rate (CSr) decreased at week 6 (-5.5 ± 0.8 to -4.6 ± 1.0 per second, P = 0.008). Radial strain/strain rate (RS/RSr) decreased at week 8 (54.8 ± 9.4 to 43.7 ± 10.6%, P = 0.005 for RS; 8.0 ± 1.1 to 7.0 ± 1.1 per second, P = 0.005 for RSr), while there was no significant change in LS/LSr, LVEF, CS/CSr, or RS/RSr in the control group. LVEF had the highest correlation with LS (r =-0.607, P = 0.000) and the lowest correlation with RSr (r = 0.357, P = 0.000). Conclusions: In DIC of rat hearts, LS/LSr decreased first, and then LVEF, CS, CSr, RS/RSr subsequently decreased. LS/LSr is considered to be a more sensitive predictor than LVEF in progressive rat DIC, and RS/RSr was preserved until the last stage. (Echocardiography 2012;29:720-728)

Original languageEnglish
Pages (from-to)720-728
Number of pages9
JournalEchocardiography
Volume29
Issue number6
DOIs
Publication statusPublished - 2012 Jul 1

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Cardiomyopathies
Stroke Volume
Doxorubicin
Echocardiography
Control Groups

Keywords

  • cardiomyopathy
  • left ventricular function
  • myocardial strain
  • two-dimensional speckle tracking echocardiography

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

Cite this

@article{fce96e1c4382473d80cf012bea7f068a,
title = "Discordant impairment of multidirectional myocardial deformation in rats with doxorubicin induced cardiomyopathy",
abstract = "Background: In doxorubicin-induced cardiomyopathy (DIC), the sequence of decrease in multidirectional myocardial deformation has not been clearly elucidated. Objectives: We investigated the sequence of myocardial deformations in rat DIC, using two-dimensional speckle tracking echocardiography (2DSTE). Methods: Twenty rats were treated with doxorubicin (1.25 mg/kg × 16 times, intraperitoneal) for 4 weeks and compared with nine control rats. Myocardial strain analysis with 2DSTE, as well as conventional echocardiography, was obtained. Results: Compared with baseline, longitudinal strain/strain rate (LS/LSr) decreased at week 2 (-15.7 ± 1.5 to -14.1 ± 1.4{\%}, P = 0.01 for LS; -4.4 ± 0.7 to -3.9 ± 0.5 per second, P = 0.009 for LSr). Left ventricular ejection fraction (LVEF) and circumferential strain (CS) decreased at week 4 (80.3 ± 3.2 to 78.1 ± 3.3{\%}, P = 0.031 for LVEF; -18.6 ± 1.9 to -15.0 ± 3.4{\%}, P = 0.019 for CS). Circumferential strain rate (CSr) decreased at week 6 (-5.5 ± 0.8 to -4.6 ± 1.0 per second, P = 0.008). Radial strain/strain rate (RS/RSr) decreased at week 8 (54.8 ± 9.4 to 43.7 ± 10.6{\%}, P = 0.005 for RS; 8.0 ± 1.1 to 7.0 ± 1.1 per second, P = 0.005 for RSr), while there was no significant change in LS/LSr, LVEF, CS/CSr, or RS/RSr in the control group. LVEF had the highest correlation with LS (r =-0.607, P = 0.000) and the lowest correlation with RSr (r = 0.357, P = 0.000). Conclusions: In DIC of rat hearts, LS/LSr decreased first, and then LVEF, CS, CSr, RS/RSr subsequently decreased. LS/LSr is considered to be a more sensitive predictor than LVEF in progressive rat DIC, and RS/RSr was preserved until the last stage. (Echocardiography 2012;29:720-728)",
keywords = "cardiomyopathy, left ventricular function, myocardial strain, two-dimensional speckle tracking echocardiography",
author = "Kim, {Yong Hyun} and Mina Kim and Seong-Mi Park and Kim, {Seong Hwan} and Lim, {Sang Yeob} and Ahn, {Jeong Cheon} and Woohyuk Song and Shim, {Wan Joo}",
year = "2012",
month = "7",
day = "1",
doi = "10.1111/j.1540-8175.2012.01689.x",
language = "English",
volume = "29",
pages = "720--728",
journal = "Echocardiography",
issn = "0742-2822",
publisher = "Wiley-Blackwell",
number = "6",

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TY - JOUR

T1 - Discordant impairment of multidirectional myocardial deformation in rats with doxorubicin induced cardiomyopathy

AU - Kim, Yong Hyun

AU - Kim, Mina

AU - Park, Seong-Mi

AU - Kim, Seong Hwan

AU - Lim, Sang Yeob

AU - Ahn, Jeong Cheon

AU - Song, Woohyuk

AU - Shim, Wan Joo

PY - 2012/7/1

Y1 - 2012/7/1

N2 - Background: In doxorubicin-induced cardiomyopathy (DIC), the sequence of decrease in multidirectional myocardial deformation has not been clearly elucidated. Objectives: We investigated the sequence of myocardial deformations in rat DIC, using two-dimensional speckle tracking echocardiography (2DSTE). Methods: Twenty rats were treated with doxorubicin (1.25 mg/kg × 16 times, intraperitoneal) for 4 weeks and compared with nine control rats. Myocardial strain analysis with 2DSTE, as well as conventional echocardiography, was obtained. Results: Compared with baseline, longitudinal strain/strain rate (LS/LSr) decreased at week 2 (-15.7 ± 1.5 to -14.1 ± 1.4%, P = 0.01 for LS; -4.4 ± 0.7 to -3.9 ± 0.5 per second, P = 0.009 for LSr). Left ventricular ejection fraction (LVEF) and circumferential strain (CS) decreased at week 4 (80.3 ± 3.2 to 78.1 ± 3.3%, P = 0.031 for LVEF; -18.6 ± 1.9 to -15.0 ± 3.4%, P = 0.019 for CS). Circumferential strain rate (CSr) decreased at week 6 (-5.5 ± 0.8 to -4.6 ± 1.0 per second, P = 0.008). Radial strain/strain rate (RS/RSr) decreased at week 8 (54.8 ± 9.4 to 43.7 ± 10.6%, P = 0.005 for RS; 8.0 ± 1.1 to 7.0 ± 1.1 per second, P = 0.005 for RSr), while there was no significant change in LS/LSr, LVEF, CS/CSr, or RS/RSr in the control group. LVEF had the highest correlation with LS (r =-0.607, P = 0.000) and the lowest correlation with RSr (r = 0.357, P = 0.000). Conclusions: In DIC of rat hearts, LS/LSr decreased first, and then LVEF, CS, CSr, RS/RSr subsequently decreased. LS/LSr is considered to be a more sensitive predictor than LVEF in progressive rat DIC, and RS/RSr was preserved until the last stage. (Echocardiography 2012;29:720-728)

AB - Background: In doxorubicin-induced cardiomyopathy (DIC), the sequence of decrease in multidirectional myocardial deformation has not been clearly elucidated. Objectives: We investigated the sequence of myocardial deformations in rat DIC, using two-dimensional speckle tracking echocardiography (2DSTE). Methods: Twenty rats were treated with doxorubicin (1.25 mg/kg × 16 times, intraperitoneal) for 4 weeks and compared with nine control rats. Myocardial strain analysis with 2DSTE, as well as conventional echocardiography, was obtained. Results: Compared with baseline, longitudinal strain/strain rate (LS/LSr) decreased at week 2 (-15.7 ± 1.5 to -14.1 ± 1.4%, P = 0.01 for LS; -4.4 ± 0.7 to -3.9 ± 0.5 per second, P = 0.009 for LSr). Left ventricular ejection fraction (LVEF) and circumferential strain (CS) decreased at week 4 (80.3 ± 3.2 to 78.1 ± 3.3%, P = 0.031 for LVEF; -18.6 ± 1.9 to -15.0 ± 3.4%, P = 0.019 for CS). Circumferential strain rate (CSr) decreased at week 6 (-5.5 ± 0.8 to -4.6 ± 1.0 per second, P = 0.008). Radial strain/strain rate (RS/RSr) decreased at week 8 (54.8 ± 9.4 to 43.7 ± 10.6%, P = 0.005 for RS; 8.0 ± 1.1 to 7.0 ± 1.1 per second, P = 0.005 for RSr), while there was no significant change in LS/LSr, LVEF, CS/CSr, or RS/RSr in the control group. LVEF had the highest correlation with LS (r =-0.607, P = 0.000) and the lowest correlation with RSr (r = 0.357, P = 0.000). Conclusions: In DIC of rat hearts, LS/LSr decreased first, and then LVEF, CS, CSr, RS/RSr subsequently decreased. LS/LSr is considered to be a more sensitive predictor than LVEF in progressive rat DIC, and RS/RSr was preserved until the last stage. (Echocardiography 2012;29:720-728)

KW - cardiomyopathy

KW - left ventricular function

KW - myocardial strain

KW - two-dimensional speckle tracking echocardiography

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U2 - 10.1111/j.1540-8175.2012.01689.x

DO - 10.1111/j.1540-8175.2012.01689.x

M3 - Article

VL - 29

SP - 720

EP - 728

JO - Echocardiography

JF - Echocardiography

SN - 0742-2822

IS - 6

ER -