Document Detail


Intraventricular early diastolic velocity profile during acute myocardial ischemia: a color M-mode Doppler echocardiographic study.
MedLine Citation:
PMID:  7640020     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The aim of the study was to investigate the effect of acute myocardial ischemia on the early diastolic mitral-to-apical velocity profile. Intraventricular filling velocities were measured by color M-mode Doppler echocardiography, which allows simultaneous measurements of velocities at multiple sites. Twenty patients were examined during angioplasty and eight dogs during transient coronary artery occlusion. Velocities at each 0.46 cm level from the mitral tip toward the apex were determined at the time of peak early transmitral velocity. Before angioplasty, early diastolic flow velocities decreased progressively from the mitral tip toward the apex. During angioplasty, intraventricular velocities showed a more abrupt decrease from the middle region toward the apex (p < 0.05). A similar change in the mitral-to-apical profile was found during myocardial ischemia in dogs (p < 0.05). Also, there was a decrease in peak early transmitral velocity (p < 0.01) and peak early transmitral pressure gradient (p = 0.06). Volume loading and constriction of the caval veins performed in the nonischemic ventricle did not appear to change the mitral-to-apical velocity profile. Regional myocardial ischemia was associated with a change in the mitral-to-apical velocity profile as measured by color M-mode Doppler echocardiography. The altered filling pattern could not be explained by changes in loading conditions and may reflect impaired relaxation of the ischemic ventricle.
Authors:
M Stugaard; O A Smiseth; C Risøe; H Ihlen
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography     Volume:  8     ISSN:  0894-7317     ISO Abbreviation:  J Am Soc Echocardiogr     Publication Date:    1995 May-Jun
Date Detail:
Created Date:  1995-09-21     Completed Date:  1995-09-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8801388     Medline TA:  J Am Soc Echocardiogr     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  270-9     Citation Subset:  IM    
Affiliation:
Medical Department B, Rikshospitalet, University of Oslo, Norway.
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MeSH Terms
Descriptor/Qualifier:
Angioplasty, Transluminal, Percutaneous Coronary
Animals
Blood Flow Velocity / physiology
Coronary Circulation / physiology
Coronary Disease / physiopathology,  therapy,  ultrasonography*
Diastole / physiology
Dogs
Echocardiography*
Echocardiography, Doppler, Color*
Electrocardiography
Female
Humans
Male
Middle Aged
Myocardial Ischemia / physiopathology,  ultrasonography*
Reproducibility of Results

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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