Abstract
Background - The aim of the present study was to characterize temporal changes in cyclic variation of ultrasonic integrated backscatter (IBS), which reflects intrinsic contractile performance, in patients with reperfused acute myocardial infarction (AMI) and to elucidate the clinical value of tissue characterization in predicting myocardial viability. Methods and Results - We recorded short-axis IBS images before and 3, 7, and 21 days after reperfusion in 26 patients with AMI and obtained the cyclic variation of lBS in the normal and infarct zones. When cyclic variation showed synchrony and asynchrony, we expressed its magnitude as positive and negative values, respectively, called the phase-corrected magnitude. We also measured average wall motion score (dyskinesis, 4; normal, 0) of the infarct segments. The phase-corrected magnitude was lower in the infarct zone than in the normal zone before reperfusion (0.3±2.5 versus 5.2±1.7 dB, P
| Original language | English |
|---|---|
| Pages (from-to) | 356-362 |
| Number of pages | 7 |
| Journal | Circulation |
| Volume | 97 |
| Issue number | 4 |
| Publication status | Published - Feb 3 1998 |
| Externally published | Yes |
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Keywords
- Echocardiography
- Myocardial contraction
- Myocardial infarction
- Reperfusion
- Ultrasonics
ASJC Scopus subject areas
- Physiology
- Cardiology and Cardiovascular Medicine
Cite this
Ultrasonic tissue characterization predicts myocardial viability in early stage of reperfused acute myocardial infarction. / Takiuchi, Shin; Itoh, Hiroshi; Iwakura, Katsuomi; Taniyama, Yoshiaki; Nishikawa, Nagahiro; Masuyama, Tohru; Hori, Masatsugu; Higashino, Yorihiko; Fujii, Kenshi; Minamino, Takazo.
In: Circulation, Vol. 97, No. 4, 03.02.1998, p. 356-362.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ultrasonic tissue characterization predicts myocardial viability in early stage of reperfused acute myocardial infarction
AU - Takiuchi, Shin
AU - Itoh, Hiroshi
AU - Iwakura, Katsuomi
AU - Taniyama, Yoshiaki
AU - Nishikawa, Nagahiro
AU - Masuyama, Tohru
AU - Hori, Masatsugu
AU - Higashino, Yorihiko
AU - Fujii, Kenshi
AU - Minamino, Takazo
PY - 1998/2/3
Y1 - 1998/2/3
N2 - Background - The aim of the present study was to characterize temporal changes in cyclic variation of ultrasonic integrated backscatter (IBS), which reflects intrinsic contractile performance, in patients with reperfused acute myocardial infarction (AMI) and to elucidate the clinical value of tissue characterization in predicting myocardial viability. Methods and Results - We recorded short-axis IBS images before and 3, 7, and 21 days after reperfusion in 26 patients with AMI and obtained the cyclic variation of lBS in the normal and infarct zones. When cyclic variation showed synchrony and asynchrony, we expressed its magnitude as positive and negative values, respectively, called the phase-corrected magnitude. We also measured average wall motion score (dyskinesis, 4; normal, 0) of the infarct segments. The phase-corrected magnitude was lower in the infarct zone than in the normal zone before reperfusion (0.3±2.5 versus 5.2±1.7 dB, P
AB - Background - The aim of the present study was to characterize temporal changes in cyclic variation of ultrasonic integrated backscatter (IBS), which reflects intrinsic contractile performance, in patients with reperfused acute myocardial infarction (AMI) and to elucidate the clinical value of tissue characterization in predicting myocardial viability. Methods and Results - We recorded short-axis IBS images before and 3, 7, and 21 days after reperfusion in 26 patients with AMI and obtained the cyclic variation of lBS in the normal and infarct zones. When cyclic variation showed synchrony and asynchrony, we expressed its magnitude as positive and negative values, respectively, called the phase-corrected magnitude. We also measured average wall motion score (dyskinesis, 4; normal, 0) of the infarct segments. The phase-corrected magnitude was lower in the infarct zone than in the normal zone before reperfusion (0.3±2.5 versus 5.2±1.7 dB, P
KW - Echocardiography
KW - Myocardial contraction
KW - Myocardial infarction
KW - Reperfusion
KW - Ultrasonics
UR - http://www.scopus.com/inward/record.url?scp=0032477839&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032477839&partnerID=8YFLogxK
M3 - Article
C2 - 9468209
AN - SCOPUS:0032477839
VL - 97
SP - 356
EP - 362
JO - Circulation
JF - Circulation
SN - 0009-7322
IS - 4
ER -