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Your journey
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More info
You can access this
clinical trial
if you have
Primary Aldosteronism or Primary Hyperaldosteronism
and you are
over 18
years old
This is an observational trial.
You are contributing to medical knowledge about your condition.
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The purpose

Primary aldosteronism (PA) is the most frequent form of secondary hypertension. It is caused by autonomous secretion of aldosterone, encompassing a group of disorders which is for 99% predominated by unilateral aldosterone-producing adenoma (APA) and bilateral adrenal hyperplasia (BAH). Diagnosis of PA is relevant for two reasons: 1. independent of the level of blood pressure, hypertension due to autonomous aldosterone secretion causes more cardiovascular damage than essential hypertension; 2. PA requires specific treatment: adrenalectomy in case of APA and mineralocorticoid receptor antagonists (MRA) in case of BAH. Although previously presumed a rare condition (prevalence <1%), PA is now estimated to affect 6 to 20% of the hypertensive population. Given this high prevalence of PA, as well as the amount of cardiovascular damage and the available specific treatment, the question is raised whether screening of PA should be introduced in Dutch general practice. To answer this important question, several issues with regard to PA need to be elucidated: 1. International studies report a prevalence of PA in general practice of 6-13%. Prevalence in the Dutch population is still unknown; 2. Because of underdiagnosis of PA and long delay in diagnosis of PA after recognition of hypertension (mean eight years), data on characteristics of early diagnosed PA are lacking. Proof of early cardiovascular damage would strengthen the case of screening for PA and needs to be studied; 3. Consequently, the diagnostic delay has lead to lack of data on optimal treatment in early PA. In the current guideline (NHG-guideline 'Cardiovascular risk management') a regimen of antihypertensive drugs is advised, and only if hypertension is refractory for >6 months patients are referred. It is unknown if hypertension is resistant to therapy in the initial phase of PA. If not, this would also argue for early biochemical screening for PA, because even if blood pressure is controlled, the detrimental effect of aldosterone itself will go on unopposed. It is therefore required to study the response to antihypertensive drugs (not MRA) in these patients.

Locations near you

Unfortunately, there are no recruiting locations near you. Please check the list with all locations below.
Tris trial is registered with FDA with number: NCT01728493. The sponsor of the trial is Radboud University and it is looking for 700 volunteers for the current phase.
Official trial title:
Primary Aldosteronism in General Practice: Organ Damage, Epidemiology and Treatment