{"id":"aldosterone-renin-ratio","name":"Aldosterone / Renin Activity Ratio (ARR)","shortName":"ARR","aliases":["Aldosterone:PRA Ratio","Aldosterone/Renin Ratio","ARR","Aldosterone/Renin Activity Ratio","Aldosterone to Renin Ratio","Aldosterone:Renin Ratio","Aldosterone/Renin Ratio, Plasma","Aldosterone/Plasma Renin Activity Ratio, LC/MS/MS","Aldosterone/PRA Ratio","A/RA Ratio","Aldosterone:Renin Activity Ratio","Aldosterone/Renin Activity Calculation"],"abbreviations":["ARR","A/RA","PAC/PRA"],"loinc":[{"code":"30894-0","primary":true},{"code":"103560-9","primary":false}],"specimen":"calculated","units":[{"ucum":"ng/dL/(ng/mL/h)","display":"ng/dL per ng/mL/h"},{"ucum":"pmol/L/(ng/mL/h)","display":"pmol/L per ng/mL/h"}],"referenceRanges":[{"population":"Adults","low":0,"high":30,"unit":"ng/dL/(ng/mL/h)","unitDisplay":"ng/dL per ng/mL/h","note":"Labcorp prints 0.0–30.0 ng/dL per ng/mL/hour for its test, which pairs LC-MS/MS aldosterone with plasma renin activity. ARUP prints 20 or less for its immunoassay version. Neither is the same as a guideline cut point: the Endocrine Society's 2025 guideline suggests above 20 (immunoassay aldosterone) or above 15 (LC-MS/MS aldosterone) as a positive first-step result when aldosterone is high enough and renin is low. ARUP's fact sheet (ARUP Consult) still lists 25. Use the range printed on your own report.","sources":[{"title":"Aldosterone:Renin Ratio (test 004354)","url":"https://www.labcorp.com/tests/004354/aldosterone-renin-ratio","publisher":"Labcorp"},{"title":"Aldosterone/Renin Activity Ratio (test 0070073)","url":"https://ltd.aruplab.com/Tests/Pub/0070073","publisher":"ARUP Laboratories"},{"title":"Aldosterone-Renin Ratio (Test Fact Sheet)","url":"https://arupconsult.com/ati/aldosterone-renin-ratio","publisher":"ARUP Consult","year":2026}]}],"review":{"status":"ai-draft","label":"AI-drafted. Awaiting verification","lastReviewed":"2026-10-03"},"summary":"A calculated ratio of aldosterone to plasma renin activity. Clinicians use it as a first step when looking into primary aldosteronism in people with high blood pressure.","url":"https://bloodtesttracker.com/markers/aldosterone-renin-ratio","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}