Document Detail

Study of the myocardial contraction and relaxation velocities through Doppler tissue imaging echocardiography: A new alternative in the assessment of the segmental ventricular function.
MedLine Citation:
PMID:  11887196     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Doppler tissue imaging (DTI) enables the study of the velocity of contraction and relaxation of myocardial segments. We established standards for the peak velocity of the different myocardial segments of the left ventricle in systole and diastole, and correlated them with the electrocardiogram. METHODS: We studied 35 healthy individuals (27 were male) with ages ranging from 12 to 59 years (32.9 plus minus 10.6). Systolic and diastolic peak velocities were assessed by Doppler tissue imaging in 12 segments of the left ventricle, establishing their mean values and the temporal correlation with the cardiac cycle. RESULTS: The means (and standard deviation) of the peak velocities in the basal, medial, and apical regions (of the septal, anterior, lateral, and posterior left ventricle walls) were respectively, in cm/s, 7.35(1.64), 5.26(1.88), and 3.33(1.58) in systole and 10.56(2.34), 7.92(2.37), and 3.98(1.64) in diastole. The mean time in which systolic peak velocity was recorded was 131.59ms (+/- 19.12ms), and diastolic was 459.18ms (+/- 18.13ms) based on the peak of the R wave of the electrocardiogram. CONCLUSION: In healthy individuals, maximum left ventricle segment velocities decreased from the bases to the ventricular apex, with certain proportionality between contraction and relaxation (P<0.05). The use of Doppler tissue imaging may be very helpful in detecting early alterations in ventricular contraction and relaxation.
Carlos Eduardo Suaide Silva; Luiz Darcy Cortez Ferreira; Luciana Braz Peixoto; Claudia Gianini Monaco; Manuel Adán Gil; Juarez Ortiz
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Arquivos brasileiros de cardiologia     Volume:  78     ISSN:  0066-782X     ISO Abbreviation:  Arq. Bras. Cardiol.     Publication Date:  2002 Feb 
Date Detail:
Created Date:  2002-03-11     Completed Date:  2002-05-14     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0421031     Medline TA:  Arq Bras Cardiol     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  200-11     Citation Subset:  IM    
Noninvasive Heart Division, São Paulo, SP, Brazil.
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MeSH Terms
Blood Flow Velocity / physiology
Coronary Circulation / physiology
Echocardiography, Doppler / methods*
Middle Aged
Myocardial Contraction / physiology*
Prospective Studies
Ventricular Function, Left / physiology*

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