Document Detail

A study of ventricular contraction sequence in complete right bundle branch block by phase analysis.
MedLine Citation:
PMID:  1863519     Owner:  NLM     Status:  MEDLINE    
Twenty-four patients with complete right bundle branch block (CRBBB) combined with and without left axis deviation (LAD) on ECG, were compared with 17 normal subjects to evaluate the right ventricular contraction sequence and pattern in detail. Blood pool scintigrams were obtained in the left anterior oblique projection, and these images were analyzed by first component Fourier harmonics. In the normal subjects, the phase value distribution representing the pattern of ventricular contraction was almost homogeneous in both the right and left ventricles (RV & LV). In the CRBBB patients without LAD, the phase images showed apparent phase delay in the right ventricle. In the CRBBB patients with LAD, the phase images showed many different contraction patterns varying from normal to RV phase delay, owing to the effects of the hemi-block. Quantitative analysis of the absolute values, showed that the mean (RV-LV) value was 6.6 +/- 8.4 msec in the normal subjects. In the CRBBB patients without LAD, the duration of the QRS complex correlated with the mean (RV-LV) value, whereas no difference was observed between the duration of the QRS complex and the standard deviation of the right ventricle. Using phase analysis the degree of the RBBB can be determined from the phase images, and can be quantitatively analyzed as in electrical studies.
T Takeda; H Toyama; K Iida; T Masuoka; R Ajisaka; K Kuga; M Satoh; S Sugahara; W Jin; N Ishikawa
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Annals of nuclear medicine     Volume:  5     ISSN:  0914-7187     ISO Abbreviation:  Ann Nucl Med     Publication Date:  1991 Mar 
Date Detail:
Created Date:  1991-09-12     Completed Date:  1991-09-12     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8913398     Medline TA:  Ann Nucl Med     Country:  JAPAN    
Other Details:
Languages:  eng     Pagination:  19-27     Citation Subset:  IM    
Institute of Clinical Medicine, University of Tsukuba, Ibaraki, Japan.
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MeSH Terms
Bundle-Branch Block / physiopathology,  radionuclide imaging*
Fourier Analysis
Middle Aged
Myocardial Contraction / physiology*
Radionuclide Ventriculography*
Ventricular Function, Right / physiology*

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