Document Detail

Systolic time intervals and heart sounds in left bundle branch block.
MedLine Citation:
PMID:  1078320     Owner:  NLM     Status:  MEDLINE    
Systolic time intervals and heart sounds were studied in twenty patients with left bundle branch block. A definite cause for the organic heart disease was not ascertained. Abnormal duration of the electromechanical systole (Q-A2), due to a prolongation both of the preejection period (PEP) and of the Q-M1 intervals, was found to exist in all. Prolongation of Q-M1 was due to lengthening either of the electromechanical interval (EMI) or of the pre-isovolumetric contraction time (PICT). Isovolumetric contraction time (ICT) was prolonged in thirteen patients only. There was a good correlation between LVET/ICT ratio and the duration of ICT intervals. Six patients showed a first heart sound of normal intensity and duration. There was no correlation between the duration of the systolic time intervals and the characteristics of the first and second heart sounds.
E Macieira-Coelho; A Lema-Santos; H B Machado; L L Faleiro
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Angiology     Volume:  27     ISSN:  0003-3197     ISO Abbreviation:  Angiology     Publication Date:    1976 Jul-Aug
Date Detail:
Created Date:  1988-04-18     Completed Date:  1988-04-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0203706     Medline TA:  Angiology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  447-54     Citation Subset:  IM    
Department of Therapeutics, Hospital de Santa Maria, Lisbon, Portugal.
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MeSH Terms
Aged, 80 and over
Bundle-Branch Block / physiopathology*
Heart Auscultation*
Heart Sounds*
Middle Aged
Myocardial Contraction*
Stroke Volume

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