Journal article
Diagnosis of Recent Myocardial Infarction With Quantitative Backscatter Imaging: Preliminary Studies
Journal of the American Society of Echocardiography, Vol.4(1), pp.10-18
01/1991
DOI: 10.1016/S0894-7317(14)80155-7
PMID: 2003932
Abstract
Acute myocardial ischemia and chronic myocardial infarction may be recognized with ultrasound tissue characterization techniques because of myocardial acoustic changes caused by reduced perfusion and/or collagen deposition. Our purpose was to study the acoustic properties of recent myocardial infarction when the predominating pathologic finding was myocardial edema and leukocytic infiltration. We used a new quantitative backscatter imaging system to study 18 patients 9 ± 5 days after myocardial infarction (eight patients with anteroseptal myocardial infarction and 10 with inferior myocardial infarction) and 20 normal subjects. The cyclic variation of relative integrated backscatter (end-diastolic minus end-systolic) was calculated from on-line measurements. Standard parasternal long- and short-axis and apical four- and two-chamber views were obtained. In the anteroseptal myocardial infarction group, the cyclic variation of relative integrated backscatter was lower in the septum (1.5 ± 1.6 dB) than in the posteroinferior wall (3.2 ± 1.2 dB); however, the sample size of only three patients (of eight patients imaged) in the latter group prevented statistical comparison. The cyclic variation of relative integrated backscatter in the infarcted septum was less than the measurement obtained in the septum of the control group (4.3 ± 2.4 dB, p < 0.05). In the inferior infarction group, the cyclic variation of integrated backscatter in the posteroinferior wall (1.8 ± 1.7 dB) was not significantly different from the measurement obtained in the septum (3.7 ± 3.6 dB); however, the cyclic variation in the posteroinferior wall was significantly less than that obtained in the control group posteroinferior wall (5.7 ± 1. / dB, p < 0.05). Suboptimal imaging of apical and parasternal short-axis views limited the ability to identify regions for analysis in most images. Thus the cyclic variation of relative integrated backscatter is blunted in recent clinical myocardial infarction, and this information may be complementary to conventional echocardiography in the diagnosis of recent myocardial infarction.
Details
- Title: Subtitle
- Diagnosis of Recent Myocardial Infarction With Quantitative Backscatter Imaging: Preliminary Studies
- Creators
- Byron F VandenbergJohn E StuhlmullerLinda RathRichard E KerberSteve M CollinsHewlett E MeltonDavid J Skorton
- Resource Type
- Journal article
- Publication Details
- Journal of the American Society of Echocardiography, Vol.4(1), pp.10-18
- Publisher
- Elsevier Inc
- DOI
- 10.1016/S0894-7317(14)80155-7
- PMID
- 2003932
- ISSN
- 0894-7317
- eISSN
- 1097-6795
- Language
- English
- Date published
- 01/1991
- Academic Unit
- Radiology; Electrical and Computer Engineering; Cardiovascular Medicine; Internal Medicine
- Record Identifier
- 9984094314802771
Metrics
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