1 Nuklearmedicinsk Afdeling, Aalborg Sygehus, Faculty of Health Sciences, Aarhus University, Aarhus University2 Kardiovaskulært Forskningscenter, Aalborg Sygehus, Faculty of Health Sciences, Aarhus University, Aarhus University3 Department of Clinical Medicine - Biomedical Radio Isotope Techniques, Department of Clinical Medicine, Health, Aarhus University4 Herning Sygehus5 Aalborg Sygehus6 Randers Sygehus7 Department of Clinical Medicine, Health, Aarhus University8 Department of Clinical Medicine - Biomedical Radio Isotope Techniques, Department of Clinical Medicine, Health, Aarhus University9 Department of Clinical Medicine, Health, Aarhus University
Objective. Distal blood pressure (DBP) determination after an exercise test is used on suspicion of arterial peripheral vascular disease (apvd). In our department. the average age of these patients is about 60 years. The usual reference values for pressures after exercise were based on data collected in the early 1970s from healthy individuals in the age range 21-26 years. Our aims were to collect new reference data for DBP at ankle level after exercise based on older populations, and to compare between reference data for different age groups to find out whether the normal values are dependent on age. Material and methods. DBP after exercise was measured using the strain-gauge technique on individuals in two groups: group I comprising 25 healthy persons aged between 61 and 82 years, and group II 14 healthy persons aged between 45 and 58 years. Strict rules of inclusion were followed. Results. Normal values are dependent on age. The average differences (ankle DBPafter - ankle DBPbefore) immediately after walking were 25 mmHg, 12 mmHg and 28 mmHg in group I, group II and the old data, respectively. Comparison among groups showed significant differences (p<=0.01). Conclusion. Normal values for elderly and middle-aged persons are presented. Use of normal values based on young people may result in underestimation of DBP response and hence underestimation of the degree of possible apvd, especially in elderly individuals.
Scandinavian Journal of Clinical and Laboratory Investigation, 2008, Vol 68, Issue 4, p. 317-322
age dependency; normal values; peripheral vascular diseases; plethysmography; reference data