PMID: 6536684Oct 1, 1984Paper

Estimation of ventricular activation by scintigraphic phase image analysis

Journal of cardiography
T KondoS Koga

Abstract

We examined the capabilities of scintigraphic phase imaging in detecting the site of the onset of ventricular activation and the pattern of ventricular activation sequence. ECG-gated equilibrium cardiac blood pool scintigraphy was obtained in the left anterior oblique (LAO) and right anterior oblique (RAO) projections. The standard 12-lead electrocardiograms (ECG) were recorded in 29 cases with various conditions. These included seven normal subjects as controls, eight patients (pts) with complete right bundle branch block (CRBBB), one with CRBBB and left axis deviation (LAD), two with complete left bundle branch block (CLBBB), one with the Wolff-Parkinson-White (WPW) syndrome (B-type), six with right ventricular apical endocardial pacemakers, one with a right ventricular anterior wall myocardial pacemaker, and three with left ventricular apical myocardial pacemakers. Phase image analysis was performed using the first harmonic of the Fourier transform to fit a cosine curve to the time-activity curve of each pixel in the cardiac blood pool study. The results were as follows: In pts with WPW syndrome (B-type) and artificial pacemakers, the site of the earliest phase angle corresponded to the site of the onset of ventricular activ...Continue Reading

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