What question did this study set out to answer?

To examine aldosterone excretion and secretion patterns during dietary sodium loading and restriction in patients with benign hypertension, and to evaluate their relationship with plasma renin activity.

July 1, 1970Journal of Clinical InvestigationOpen Access

Abnormally sustained aldosterone secretion during salt loading in patients with various forms of benign hypertension; relation to plasma renin activity

View Full Paper

Ask AI

Bookmark

Why the study?

Does dietary sodium loading and depletion alter aldosterone secretion and plasma renin activity differently in patients with benign hypertension compared to normotensive controls?

Population

50 patients with benign hypertension without serious cardiac, renal, or cerebrovascular impairment, and…

Comparison

Dietary sodium loading and sodium depletion vs Normotensive controls on comparable sodium intakes

Design

Cross-sectional

Authors

RCR. Dennis CollinsSan Francisco General Hospital MWMyron H. WeinbergerIndianapolis Zoo ADA. J. DowdySan Francisco General Hospital

Discussion

Member takes

Implication

Abnormal aldosterone response to salt loading in hypertension is hypothesis-generating; prospective studies needed before clinical consideration.

Key Points

To examine aldosterone excretion and secretion patterns during dietary sodium loading and restriction in patients with benign hypertension, and to evaluate their relationship with plasma renin activity.
Assessed 50 patients with benign hypertension (25 with essential hypertension and 25 with other benign forms) and normotensive controls without severe cardiac, renal, or cerebrovascular disease.
Administered dietary sodium regimens consisting of high-sodium loading (300 mEq/day) and sodium depletion (10 mEq/day).
Quantified aldosterone excretion rates, secretion rates via labeled conjugate, and plasma renin activity across both dietary conditions.
During salt loading of 300 mEq/day, 41 of 50 patients failed to suppress aldosterone excretion to normal levels (<5 µg/day), showing significantly higher secretion rates than normotensive controls.
Under sodium depletion (10 mEq/day), aldosterone excretion and secretion rates correlated with plasma renin activity, producing blunted responses in low-renin patients and pronounced elevations in high-renin cases.
Identified primary hyperaldosteronism in 5 of 16 patients with low plasma renin activity, while the remaining low-renin cases exhibited nonsuppressible aldosterone production without an identified stimulus.

Structured PICO

Does dietary sodium loading and depletion alter aldosterone secretion and plasma renin activity differently in patients with benign hypertension compared to normotensive controls?

Population

50 patients with benign hypertension (25 with essential hypertension, 25 with other benign forms) without serious cardiac, renal, or cerebrovascular impairment, and normotensive controls.

Intervention

Dietary sodium loading (300 mEq/day) and sodium depletion (10 mEq/day)

Comparator

Normotensive controls on comparable sodium intakes

Outcome

Aldosterone excretion rates, aldosterone secretion rates, and plasma renin activity (PRA)surrogate

Patients with benign hypertension exhibit abnormally sustained aldosterone secretion during salt loading, which is often related to higher plasma renin activity compared to normotensive controls.

Cite This Study

Collins et al. (1970) studied this question.

synapsesocial.com/papers/6a7d71d9fac401f2784265eb https://doi.org/10.1172/jci106359

Topics

Hypertension management

View Full Paper

Ask AI

Bookmark

Implication

Abnormal aldosterone response to salt loading in hypertension is hypothesis-generating; prospective studies needed before clinical consideration.

Abnormally sustained aldosterone secretion during salt loading in patients with various forms of benign hypertension; relation to plasma renin activity

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Topics

Abnormally sustained aldosterone secretion during salt loading in patients with various forms of benign hypertension; relation to plasma renin activity

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Topics

Also Consider