Document Detail

Use of apexcardiography to evaluate left ventricular diastolic compliance in human beings.
MedLine Citation:
PMID:  433775     Owner:  NLM     Status:  MEDLINE    
The relation between various relative amplitude measurements of the left apexcardiogram and internally derived indexes of diastolic compliance of the left ventricle was studied in 29 patients. Simultaneous high fidelity recordings of the left apex tracing and left ventricular pressure were obtained in 11 patients without left ventricular disease (group I) and 18 patients with congestive cardiomyopathy (group II). In 204 normal subjects the ratio of the A wave amplitude to the total diastolic deflection (A/D ratio) of the left apexcardiogram was 31.4 +/- 11.4 (mean +/- standard deviation) percent, the ratio of the A wave amplitude to the total height (A/H ratio) 8.9 +/- 4.3 percent and the D/H ratio 30.4 +/- 14.7 percent. The A/D and A/H ratios were significantly (P less than 0.001 and P less than 0.005) increased in group II (69.2 +/- 12.2 percent and 16.8 +/- 8.2 percent, respectively); they were within normal limits in group I. In contrast, the D/H ratio was within normal limits in both groups of patients. The A/D ratio correlated significantly better with specific compliance (deltaV/deltaP.V) (r = -0.87) than did the A/H ratio (r = -0.53), whereas similar correlations were obtained with end-diastolic volume compliance (dV/dPV) (r = -0.61 and r = - 0.64, respectively). In contrast, the D/H ratio correlated significantly only with end-diastolic distensibility index (dV/dP) (r = -0.52). It is concluded that A wave amplitude/total diastolic deflection (A/D) ratio and, to a lesser degree, the A wave amplitude/total height (A/H) ratio of the left apexcardiogram correspond best to diastolic compliance and are useful noninvasive measurements of this property of the left ventricle.
J Manolas; H P Krayenbuehl; W Rutishauser
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American journal of cardiology     Volume:  43     ISSN:  0002-9149     ISO Abbreviation:  Am. J. Cardiol.     Publication Date:  1979 May 
Date Detail:
Created Date:  1979-06-26     Completed Date:  1979-06-26     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0207277     Medline TA:  Am J Cardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  939-45     Citation Subset:  AIM; IM    
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MeSH Terms
Cardiomyopathies / complications,  diagnosis*,  physiopathology
Evaluation Studies as Topic
Heart Catheterization
Heart Failure / etiology,  physiopathology
Heart Rate
Middle Aged
Myocardial Contraction*
Regression Analysis
Stroke Volume

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

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