Article (Scientific journals)
Haemodynamic changes during a squat test, pulsatile stress and indices of cardiovascular autonomic neuropathy in patients with long-duration type 1 diabetes.
PHILIPS, Jean-Christophe; MARCHAND, Monique; SCHEEN, André
2011In Diabetes and Metabolism
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Keywords :
Cardiovascular autonomic neuropathy; pulsatile stress; cardiovascular risk factors; orthostatic test; Diabetes; arterial blood pressure
Abstract :
[en] AIM: Cardiovascular autonomic neuropathy (CAN) and pulsatile stress are considered to be independent cardiovascular risk factors. This study compared haemodynamic changes during an active orthostatic test in adult patients with type 1 diabetes (T1DM), using low versus high RR E/I ratios as a marker of CAN. METHODS: A total of 20 T1DM patients with low RR E/I ratios were compared with 20 T1DM patients with normal RR E/I ratios, matched for gender (1/1 ratio), age (mean: 46years) and diabetes duration (22-26years); 40 matched healthy subjects served as controls. All subjects were evaluated by continuous monitoring of arterial blood pressure (Finapres((R))) and heart rate using a standardized posture test (1-min standing, 1-min squatting, 1-min standing), thus allowing calculation of baroreflex gain. RESULTS: Compared with controls, T1DM patients showed lower RR E/I ratios, reduced baroreflex gains, higher pulsatile stress (pulse pressurexheart rate), greater squatting-induced pulse pressure rises, orthostatic hypotension and reduced reflex tachycardia. Compared with T1DM patients with preserved RR E/I ratios, T1DM patients with low RR E/I ratios showed reduced post-standing reflex tachycardia and baroreflex gain, and delayed blood pressure recovery, but no markers of increased pulsatile stress. Interestingly, decreased baroreflex gain was significantly associated with both pulsatile stress and microalbuminuria. CONCLUSION: The use of RR E/I ratios to separate T1DM patients allows the detection of other CAN markers during an orthostatic posture test, but with no significant differences in pulsatile stress or microalbuminuria. In this context, squatting-derived baroreflex gain appears to be more informative.
Disciplines :
Cardiovascular & respiratory systems
Endocrinology, metabolism & nutrition
Author, co-author :
PHILIPS, Jean-Christophe ;  Centre Hospitalier Universitaire de Liège - CHU > Diabétologie,nutrition, maladies métaboliques
MARCHAND, Monique ;  Centre Hospitalier Universitaire de Liège - CHU > Diabétologie,nutrition, maladies métaboliques
SCHEEN, André  ;  Centre Hospitalier Universitaire de Liège - CHU > Diabétologie,nutrition, maladies métaboliques
Language :
English
Title :
Haemodynamic changes during a squat test, pulsatile stress and indices of cardiovascular autonomic neuropathy in patients with long-duration type 1 diabetes.
Publication date :
2011
Journal title :
Diabetes and Metabolism
ISSN :
1262-3636
eISSN :
1878-1780
Publisher :
Masson, Moulineaux Cedex 9, France
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright (c) 2011 Elsevier Masson SAS. All rights reserved.
Available on ORBi :
since 16 January 2012

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