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Titolo:
NEW CONCEPT IN ECHOCARDIOGRAPHY - HARMONIC IMAGING OF TISSUE WITHOUT USE OF CONTRAST AGENT
Autore:
CAIDAHL K; KAZZAM E; LIDBERG J; ANDERSEN GN; NORDANSTIG J; DAHLWVIST SR; WALDENSTROM A; WIKH R;
Indirizzi:
SAHLGRENS UNIV HOSP,DEPT CLIN PHYSIOL SE-41345 GOTHENBURG SWEDEN UNIV UMEA HOSP,DEPT CARDIOL S-90185 UMEA SWEDEN UNIV UMEA HOSP,DEPT RHEUMATOL S-90185 UMEA SWEDEN
Titolo Testata:
Lancet
fascicolo: 9136, volume: 352, anno: 1998,
pagine: 1264 - 1270
SICI:
0140-6736(1998)352:9136<1264:NCIE-H>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACUTE MYOCARDIAL-INFARCTION; SYSTEMIC-SCLEROSIS; INJECTION; OPACIFICATION; ULTRASOUND; RESOLUTION; EFFICACY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
K. Caidahl et al., "NEW CONCEPT IN ECHOCARDIOGRAPHY - HARMONIC IMAGING OF TISSUE WITHOUT USE OF CONTRAST AGENT", Lancet, 352(9136), 1998, pp. 1264-1270

Abstract

Background Endocardial border detection is important for echocardiographic assessment of left-ventricular function. Second harmonic imagingof contrast agents enhances this border detection. We discovered thatharmonic imaging improves tissue visualisation even before contrast injection. We therefore sought objectively to demonstrate the degree ofenhancement of endocardial and myocardial visualisation. Methods An ATL HDI-3000 scanner with software for contrast harmonic imaging was used to record short-axis images of the left ventricle in 27 patients with possible myocardial disease and 22 controls, in the fundamental mode and with harmonic imaging. A computer program measured the relative grey-scale values within six segments of the endocardium and myocardium. An Acuson Sequoia Scanner equipped with software for tissue harmonic imaging was used to investigate the reproducibility of ejection-fraction calculations in 22 patients with ischaemic heart disease. Findings Harmonic imaging produced brighter endocardium within each segment. Relative to the mean grey value of the total imaging sector, the values for harmonic and fundamental imaging were 171.5 vs 85.6% (p<0.0001) in end diastole and 194.1 vs 106.7% (p<0.0001) in end systole. Resultsfor the myocardial segments were also significantly better for harmonic imaging. Structure enhancement of similar magnitude was seen among patients and healthy controls. Use of harmonic imaging reduced the proportion of unacceptable images by 14-46% in different views and improved the reproducibility of biplane ejection-fraction measurements. Interpretation In comparison with fundamental imaging, the relative endocardial and myocardial brightness is enhanced by harmonic imaging.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 02:27:28