Aldosterone-Renin Ratio Calculator
Calculate the aldosterone-to-renin ratio (ARR) for screening primary aldosteronism. Essential for endocrine evaluation and hypertension workup!
ARR = \frac{\text{Aldosterone}}{\text{Renin}} • 🩺 Endocrinology • 💊 Hypertension • 📊 Hormone Analysis
Laboratory Values
Patient Information
Clinical Context
Hormone Balance
Normal Balance
ARR Scale
0
20
30
50
100+
ARR Formula:
Reference Ranges:
Normal: <20 • Borderline: 20-30 • Elevated: 30-50 • High: >50
Interpretation Guide
Normal:
<20
Borderline:
20-30
Elevated:
30-50
High:
>50
ARR Analysis Results
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ARR Value
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Interpretation
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Risk Level
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Follow-up
Laboratory Analysis
Aldosterone:
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Renin:
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Collection Method:
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Potassium Level:
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ARR Comparison
"The aldosterone-to-renin ratio is the most practical screening test for primary aldosteronism."
- Endocrine Society Guidelines
Clinical Insights
Clinical Significance
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Interfering Factors
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Next Steps
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Patient Counseling
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ARR Clinical Guide
What is the Aldosterone-Renin Ratio?
The ARR is calculated as: ARR = \frac{\text{Aldosterone (ng/dL)}}{\text{Renin (ng/mL/h)}}
It's the primary screening test for primary aldosteronism, a common cause of secondary hypertension.
Interpretation Guidelines
- Normal (<20): Low probability of primary aldosteronism
- Borderline (20-30): Consider repeat testing or confirmatory tests
- Elevated (30-50): Moderate probability, confirmatory testing recommended
- High (>50): High probability, proceed with confirmatory testing
Factors Affecting ARR
- Antihypertensive medications (especially ACE inhibitors, ARBs, diuretics)
- Posture and time of day
- Sodium intake and potassium levels
- Age, gender, and pregnancy
- Kidney function and other medical conditions
Clinical Applications
- Screening for primary aldosteronism in hypertensive patients
- Evaluation of resistant hypertension
- Assessment of patients with hypokalemia
- Follow-up after adrenalectomy