Document Detail


Assessment of the left ventricular diastolic reserve in essential hypertension: the acute saline load test.
MedLine Citation:
PMID:  11473570     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: The aim of this study was to evaluate the significance of the development of a restrictive response to an acute saline load, defined as an increase in the ratio of peak early to peak late diastolic transmitral flow velocity (E/A ratio) associated with a decrease in the deceleration time, in patients with mild to moderate untreated hypertension. BACKGROUND: Recognised abnormal patterns of transmitral diastolic flow include, from 'best' to 'worst': prolonged relaxation, pseudonormalisation, and restrictive physiology. The common denominator of these transitions is the constellation of an increase in the E/A ratio associated with a decrease in deceleration time. PATIENTS AND METHODS: Sixteen normal control subjects (6 males, 10 females, age 51.6 +/- 6.9 years) and 24 patients with mild to moderate untreated hypertension (12 males, 12 females, age 46.8 +/- 7.5 years) underwent supine blood pressure measurement with sphygmomanometry, biochemical studies, and transthoracic M-mode, 2D, and Doppler echocardiography before and after an acute saline load (7 mL kg(-1), maximum 500 mL, NaCl 0.9% within 15 min IV). RESULTS: The baseline E/A ratio was lower (0.90 +/- 0.14 vs. 1.04 +/- 0.18; P < 0.01) and the deceleration time was longer (158.8 +/- 19.4 vs. 135 +/- 8.9 ms; P < 0.01) in patients with hypertension compared with normotensive controls. However, no patient with hypertension exhibited a transmitral flow velocity pattern compatible with typical prolonged relaxation. A restrictive response to the acute saline load was observed in 12 (50%) of the hypertensive and none of the control subjects. Hypertensive patients with a restrictive response to the acute saline load had a lower baseline E velocity (54.8 +/- 8.7 cm s(-1) vs. 66 +/- 6.4 cm s(-1); P = 0.003), a lower baseline E/A ratio (0.83 +/- 0.13 vs. 0.97 +/- 0.12; P = 0.015), and a longer deceleration time (167.5 +/- 15.4 ms vs. 150 +/- 19.5; P = 0.03) than hypertensive patients without such a response. CONCLUSION: A restrictive response to an acute saline load is indicative of a limited diastolic reserve in patients with mild to moderate untreated hypertension. Further studies are required in order to evaluate the significance of such a response with regards to risk stratification and efficacy of medical treatment in this patient population.
Authors:
F Triposkiadis; I Moyssakis; T Makris; A Hatzizaharias; L Hadjinikolaou; M Kyriakidis
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  European journal of clinical investigation     Volume:  31     ISSN:  0014-2972     ISO Abbreviation:  Eur. J. Clin. Invest.     Publication Date:  2001 Aug 
Date Detail:
Created Date:  2001-07-27     Completed Date:  2001-12-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0245331     Medline TA:  Eur J Clin Invest     Country:  England    
Other Details:
Languages:  eng     Pagination:  690-7     Citation Subset:  IM    
Affiliation:
University of Thessaly, Department of Cardiology, Larissa, Greece. filtrip@yahoo.com
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MeSH Terms
Descriptor/Qualifier:
Adult
Blood Flow Velocity
Blood Pressure
Diastole / physiology
Female
Heart Function Tests
Humans
Hypertension / physiopathology*
Male
Middle Aged
Mitral Valve / physiopathology
Sodium Chloride / administration & dosage,  diagnostic use*
Ventricular Function, Left / physiology*
Chemical
Reg. No./Substance:
7647-14-5/Sodium Chloride

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


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