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Plasma renin activity and coronary heart disease: are they related?
1Department of Epidemiology and Social Medicine, Albert Einstein College of Medicine, Bronx, New York, USA.
Insights
Hypertensive patients with high renin-sodium profiles face a greater risk of heart attack. This risk was not observed in normotensive individuals, highlighting a specific link in those with high blood pressure.
Area of Science:
- Cardiology
- Hypertension Research
- Renal Physiology
Background:
- The renin-angiotensin-aldosterone system (RAAS) plays a crucial role in blood pressure regulation.
- Elevated plasma renin activity is a hallmark of certain hypertensive conditions.
- The interplay between renin and sodium levels in predicting cardiovascular events requires further elucidation.
Purpose of the Study:
- To investigate the association between pretreatment renin-sodium profiles and the incidence of coronary artery disease (CAD) events in hypertensive patients.
- To determine if plasma renin activity alone, in normotensive subjects, correlates with cardiovascular risk.
Main Methods:
- Retrospective and prospective cohort studies were conducted.
- Patients were stratified based on pretreatment renin and sodium profiles.
- Coronary artery disease events, including myocardial infarction, were tracked during treatment.
- Analysis controlled for established coronary risk factors and pre-existing conditions.
Main Results:
- A significant positive relationship was found between high pretreatment renin-sodium profiles and the occurrence of CAD events in hypertensive patients.
- Patients with the highest renin-sodium profiles had a significantly higher likelihood of myocardial infarction compared to those with normal or low profiles.
- No similar relationship was observed for plasma renin activity alone in a population of normotensive subjects.
Conclusions:
- The renin-sodium profile is a significant predictor of coronary artery disease events in hypertensive individuals.
- In hypertensive patients, an elevated renin-sodium profile indicates an increased risk of heart attack, independent of other risk factors.
- The adverse cardiovascular impact of elevated plasma renin activity appears specific to the hypertensive state.
Abstract:
Both a retrospective and a prospective study of hypertensive patients have detected a significant positive relationship between pretreatment renin and sodium profiles, and the occurrence of coronary artery disease events during treatment. The subgroup of patients with the highest renin-sodium profile, while controlling for other known coronary risk factors as well as pre-existing disease, were significantly more likely to experience a fatal or nonfatal myocardial infarction compared with those with normal or low renin-sodium profiles. A population of almost entirely normotensive subjects failed to show a similar relationship for plasma renin activity alone. In the normotensive patient in whom the plasma renin activity is physiologically linked to blood pressure level, no adverse effect of an elevated plasma renin activity is seen. By contrast, in the hypertensive patient, in whom plasma renin activity should approach zero, there is a direct correlation between the renin-sodium profile and the risk of developing subsequent heart attack.