Open AccessCardiovascular response in black and white hypertensives.
Author(s) -
D. B. Rowlands,
Joseph De Giovanni,
R A McLeay,
R. Douglas Watson,
T. J. Stallard,
W. A. Littler
Publication year - 1982
Publication title -
hypertension
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.986
H-Index - 265
eISSN - 1524-4563
pISSN - 0194-911X
DOI - 10.1161/01.hyp.4.6.817
Subject(s) - medicine , plasma renin activity , blood pressure , baroreflex , endocrinology , negroid , ambulatory blood pressure , norepinephrine , cardiology , heart rate , renin–angiotensin system , epidemiology , dopamine
Sixteen untreated black patients with mild-to-moderate hypertension and no evidence of target organ damage were matched for age, sex, casual blood pressure (BP), and socioeconomic status with 16 white hypertensives. All patients were studied under standardized conditions in the hospital where they underwent continuous intraarterial ambulatory monitoring of BP and assessment of BP control mechanisms. BP characteristics over prolonged periods of recording were similar for both groups, as were sinoaortic baroreflex activity and pressor response to isometric and dynamic exercise and to cold. Fasting cholesterol and triglyceride levels in both groups were similar. Resting plasma renin activity (PRA) was significantly lower in blacks, but no difference was observed in resting plasma norepinephrine levels. Urinary excretion of NA+ and K+ was also similar in both groups. Thus, results showed that casual BPs matched for black and whites, and recorded over a prolonged period, were similar in pattern, variability, and response to pressor stimuli. It appears that, if BP contributes to the different patterns of morbidity in blacks and whites, it is more likely to be the actual level of BP rather than differences in BP characteristics.