SCREENING RATES FOR PRIMARY ALDOSTERONISM ARE UNSATISFACTORY EVEN IN HYPERTENSION EXCELLENCE CENTERS. A CALL FOR COMPULSORY SCREENING FOR ALL HYPERTENSIVE PATIENTS

Abstract

Objective: The Endocrine Society guidelines recommend screening for primary aldosteronism (PA) in high risk hypertensive patients. These include patients with sustained blood pressure (BP) above 150/100 mmHg, patients with resistant hypertension (HTN), hypertensive patients with spontaneous or diuretic-induced hypokalemia, adrenal incidentaloma, sleep apnea, family history of early onset HTN or cerebrovascular accident at a young age and all hypertensive first-degree relatives of patients with PA. Even though guidelines are clear and screening is simple, compliance rates among clinicians are extremely low ranging between 0.1% to 2.7%. This results in underdiagnosis of early disease, leading to an enormous extra-burden of advanced chronic kidney disease, heart failure, atrial fibrillation, and stroke. We aimed to examine the screening rate, according to the abovementioned guidelines, at our recently recognized Hypertension Excellence Center in Assuta Ashdod University Hospital. Design and method: A retrospective cohort study. We analyzed all hypertensive patients, eligible for screening between 01/18 and 12/20. We calculated screening rates and in univariate and multivariate regression analyses, looked at parameters that influence screening. Results: Of 661 patients over 18 years of age with HTN, 218 patients (33%) met the Endocrine Society guidelines for PA screening. However only 46 of them (21.1%), were referred for screening. A multivariate regression analysis, demonstrated that advanced age and male gender were associated with lower rates of screening referral. Odds ratio for age was 0.945 for every year (95% CI 0.915-0.975). Conclusions: A 21% screening rate in a Hypertension Excellence Center, although higher than prior published studies, suggests that many cases of PA are likely missed, more often in elderly population in whom adrenal micro as well as macronodular-hyperplasia is extremely common and can be the cause of secondary HTN. We therefore advocate for PA screening at least once of all hypertensive patients, preferably before the patient is started on multiple anti-hypertensive medications. This should be done regardless of patients’ age and gender, as the absolute risk for cardiovascular events in both hypertensive and PA patients increases with rising age, and treatment with mineralocorticoid receptor antagonists can be lifesaving.