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Diastolic blood pressure, aortic atheroma, and prognosis in hypertension: new insights into a complex association.

Diastolic blood pressure, aortic atheroma, and prognosis in hypertension: new insights into a complex association.

Authors :
Courand PY
Milon H
Bricca G
Khettab F
Lantelme P
Source :
Atherosclerosis [Atherosclerosis] 2014 Mar; Vol. 233 (1), pp. 300-6. Date of Electronic Publication: 2014 Jan 21.
Publication Year :
2014

Abstract

Objectives: Our study aimed at determining the interaction between the prognostic value of diastolic blood pressure (DBP) and aortic atherosclerosis (ATS).<br />Background: With aging, equal systolic blood pressures (SBPs) become associated with low DBPs; i.e., high pulse pressures (PPs) become associated with a high risk of cardiovascular death. This association is usually ascribed to aortic stiffening with age but the precise impact of low DBP per se is yet uncertain.<br />Methods: 938 hypertensive patients recruited in the seventies had an aortic ATS score at pretreatment aortography. All-cause and cardiovascular deaths were assessed 20 years later. The prognostic values of DBP and SBP were assessed by a multivariate Cox regression model and their interactions with ATS examined.<br />Results: In the presence of ATS, an increase of 10 mmHg in DBP was associated with a protective effect: hazard ratios 0.84 [0.72-0.99] for cardiovascular death and 0.88 [0.78-1.00] for all-cause death. However, in the absence of ATS, DBP had no prognostic value: hazard ratios 1.05 [0.89-1.23] for cardiovascular death and 0.99 [0.88-1.11] for all-cause death (p for interaction: 0.061 and 0.087, respectively). No interaction was found between SBP and ATS (p for interaction > 0.40).<br />Conclusions: The prognostic values of DBP and aortic atheroma are not superimposable; yet, they are tightly connected: a low DBP is disadvantageous only in the presence of a pathologic aorta. Aortic atherosclerosis may explain, at least partly, in some high risk populations, the J-shape of the already reported DBP-outcome relationship.<br /> (Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.)

Details

Language :
English
ISSN :
1879-1484
Volume :
233
Issue :
1
Database :
MEDLINE
Journal :
Atherosclerosis
Publication Type :
Academic Journal
Accession number :
24495793
Full Text :
https://doi.org/10.1016/j.atherosclerosis.2014.01.004