Renal Hemodynamics and the Renin–Angiotensin–Aldosterone System in Normotensive Subjects with Hypertensive and Normotensive Parents
Why the study?
Does a parental history of hypertension alter renal hemodynamics and renin-angiotensin-aldosterone system characteristics in young normotensive subjects?
Population
154 normotensive subjects aged 7 to 32 years, stratified by parental history of hypertension
Comparison
Having two hypertensive parents vs Having two normotensive parents
Design
Cross-sectional
Authors
Discussion
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Implication
May signal early renal changes in familial hypertension risk; hypothesis-generating and requires longitudinal confirmation before clinical relevance.
Key Points
- The study investigates renal hemodynamics and hormonal profiles in normotensive individuals with hypertensive family history.
- Compared renal hemodynamics and renin-angiotensin-aldosterone system characteristics in three groups based on parental hypertension.
- Included 41 subjects with two normotensive parents, 52 with one hypertensive parent, and 61 with two hypertensive parents.
- Measured renal blood flow, filtration fraction, and hormonal levels.
- Subjects with two hypertensive parents showed lower renal blood flow (mean difference 198 +/- 61 ml/min, P = 0.002).
- Higher filtration fraction (mean difference 3.0 +/- 1.1 percentage points, P = 0.006) and renal vascular resistance (mean difference 2.7 +/- 0.8 mm Hg, P = 0.006) were observed in this group.
- Lower plasma renin (mean difference 3.3 +/- 1.6 mU/L, P = 0.03) and aldosterone (mean difference 111 +/- 36 pmol/L, P = 0.003) levels were noted in subjects with two hypertensive parents.
Structured PICO
Does a parental history of hypertension alter renal hemodynamics and renin-angiotensin-aldosterone system characteristics in young normotensive subjects?
P
Population
154 normotensive subjects aged 7 to 32 years, stratified by parental history of hypertension (41 with two normotensive parents, 52 with one normotensive and one hypertensive parent, and 61 with two hypertensive parents)
I
Intervention
Having two hypertensive parents (or one hypertensive parent)
C
Comparator
Having two normotensive parents
O
Outcome
Renal hemodynamics (renal blood flow, filtration fraction, renal vascular resistance) and characteristics of the renin-angiotensin-aldosterone system (plasma renin and aldosterone concentrations)surrogate
Young normotensive individuals with a parental history of hypertension exhibit increased renal vasoconstriction and decreased renin and aldosterone secretion, suggesting early renal hemodynamic alterations in familial hypertension.
Cite This Study
Hooft et al. (1991) studied this question.