A computerized method of quantitative analysis of ventricular phase distributions

Phase images from gated equilibrium cardiac studies, were analysed quantitatively by a computerized automatic method. The study included 17 normal subjects and 33 patients with an acute myocardial infarction (AMI). Phase histograms were constructed for each ventricle and their peaks were identified...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:European journal of nuclear medicine Jg. 8; H. 9; S. 375
Hauptverfasser: Fránquiz, J M, García-Barreto, D, Cárdenas, R
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Germany 01.01.1983
Schlagworte:
Adolescent
Adult
Aged
Cardiac Output
Computers
Female
Follow-Up Studies
Heart - physiopathology
Heart Conduction System - physiopathology
Heart Ventricles - physiopathology
Humans
Male
Middle Aged
Myocardial Contraction
Myocardial Infarction - physiopathology
Prognosis
Stroke Volume
ISSN:0340-6997
Online-Zugang:Weitere Angaben
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Phase images from gated equilibrium cardiac studies, were analysed quantitatively by a computerized automatic method. The study included 17 normal subjects and 33 patients with an acute myocardial infarction (AMI). Phase histograms were constructed for each ventricle and their peaks were identified by a convolution algorithm for smoothing and differentiation. Intra- and interventricular phase shifts as well as the percentage of normal contracting pixels (NCP) were calculated. The results showed that the left ventricular ejection fraction (LVEF) tends to decrease when the intraventricular phase shift increases. Interventricular phase shifts out of the normal range (+/- 10 degrees) were observed predominantly in patients with an extensive anterior or anteroseptal AMI. The closest relationship was found between LVEF and the percentage of NCP. This parameter decreases when akinetic and dyskinetic areas increase and could be considered as a quantitative index of the synchronism in myocardial contraction useful in the prognosis and follow-up of patients.
Bibliographie:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0340-6997
DOI:10.1007/BF00253209