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...

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Bibliographic Details
Published in:European journal of nuclear medicine Vol. 8; no. 9; p. 375
Main Authors: Fránquiz, J M, García-Barreto, D, Cárdenas, R
Format: Journal Article
Language:English
Published: Germany 01.01.1983
Subjects:
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 Access:Get more information
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Summary: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.
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ISSN:0340-6997
DOI:10.1007/BF00253209