{"uid":"cap_h2voJPZ3IVHAjqRr15ZrT","slug":"atria-hemorrhage-risk-score-calculator-54871706","name":"ATRIA Hemorrhage Risk Score Calculator","description":"Fang 2011 ATRIA hemorrhage score: anemia caller flag 3 (paper Hb <13 g/dL men or <12 g/dL women); severe renal disease (eGFR <30 or dialysis) caller flag 3; age >=75 scores 2; prior hemorrhage 1; diagnosed hypertension 1. Max 10. Score 0-3 low, 4 intermediate, 5-10 high. Not a diagnosis. Not a warfarin order. Not HAS-BLED. magent does not measure hemoglobin or compute eGFR.","url":"https://api.magentlab.com/api/calc/atria","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","required":["anemia","severe_renal_disease","age","prior_hemorrhage","hypertension"],"properties":{"age":{"type":"integer","description":"Age in years (18-120). ≥75 scores 2 (75 scores; 74 does not)."},"anemia":{"type":"boolean","description":"Anemia as assigned by the caller (paper: hemoglobin <13 g/dL in men or <12 g/dL in women). true or false. Scores 3. magent does not measure hemoglobin."},"hypertension":{"type":"boolean","description":"Diagnosed hypertension as assigned by the caller. true or false. Scores 1."},"prior_hemorrhage":{"type":"boolean","description":"Any prior hemorrhage diagnosis as assigned by the caller. true or false. Scores 1."},"severe_renal_disease":{"type":"boolean","description":"Severe renal disease as assigned by the caller (paper: eGFR <30 or dialysis). true or false. Scores 3. magent does not compute eGFR."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"path":"/api/calc/atria","count":2,"items":[{"score":0,"formula":"atria","citation":{"id":"fang-2011","doi":"10.1016/j.jacc.2011.03.031","pmid":"21757117","title":"A new risk scheme to predict warfarin-associated hemorrhage: the ATRIA (Anticoagulation and Risk Factors in Atrial Fibrillation) Study","source":"J Am Coll Cardiol. 2011;58(4):395-401","authors":"Fang MC, Go AS, Chang Y, et al."},"age_years":60,"max_score":10,"risk_band":"low","components":[{"factor":"anemia","points":0,"present":false},{"factor":"severe_renal_disease","points":0,"present":false},{"value":60,"factor":"age_ge_75","points":0,"present":false},{"factor":"prior_hemorrhage","points":0,"present":false},{"factor":"hypertension","points":0,"present":false}],"disclaimer":"Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.","formula_expression":"ATRIA = anemia (3) + severe_renal_disease (3) + age_ge_75 (2) + prior_hemorrhage (1) + hypertension (1); max 10; 0-3 low, 4 intermediate, 5-10 high"},{"score":0,"formula":"atria","citation":{"id":"fang-2011","doi":"10.1016/j.jacc.2011.03.031","pmid":"21757117","title":"A new risk scheme to predict warfarin-associated hemorrhage: the ATRIA (Anticoagulation and Risk Factors in Atrial Fibrillation) Study","source":"J Am Coll Cardiol. 2011;58(4):395-401","authors":"Fang MC, Go AS, Chang Y, et al."},"age_years":60,"max_score":10,"risk_band":"low","components":[{"factor":"anemia","points":0,"present":false},{"factor":"severe_renal_disease","points":0,"present":false},{"value":60,"factor":"age_ge_75","points":0,"present":false},{"factor":"prior_hemorrhage","points":0,"present":false},{"factor":"hypertension","points":0,"present":false}],"disclaimer":"Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.","formula_expression":"ATRIA = anemia (3) + severe_renal_disease (3) + age_ge_75 (2) + prior_hemorrhage (1) + hypertension (1); max 10; 0-3 low, 4 intermediate, 5-10 high"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_RQTzH5-03Skm9DGQ-wA_W","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the Fang 2011 ATRIA bleeding risk score for patients on anticoagulation therapy based on five clinical factors: anemia, severe renal disease, age, prior hemorrhage, and hypertension.","exampleAgentPrompt":"Calculate the ATRIA hemorrhage score for a 78-year-old male patient who has anemia, no severe renal disease, no prior hemorrhage, and a diagnosed hypertension — what's his score and risk category?","exampleUseCases":[{"title":"Pre-anticoagulation bleeding risk screening","prompt":"I need the ATRIA hemorrhage score for a 76-year-old woman who has anemia and hypertension but no prior bleeds and no severe renal disease — is she low, intermediate, or high risk?"},{"title":"Renal patient on anticoagulation risk check","prompt":"Score this 82-year-old male patient for ATRIA hemorrhage risk: he's on dialysis, no anemia flagged, has a history of prior hemorrhage, and has hypertension."},{"title":"Low-risk younger patient confirmation","prompt":"What's the ATRIA bleeding risk score for a 65-year-old patient with hypertension only — no anemia, no severe renal disease, no prior hemorrhage?"}],"resultDescription":"Returns the numeric ATRIA hemorrhage score (0–10) and the corresponding risk category: low (0–3), intermediate (4), or high (5–10). Does not provide a clinical diagnosis or treatment recommendation; caller is responsible for supplying anemia and renal disease flags based on measured lab values.","failureModes":["Missing required query parameters (anemia, severe_renal_disease, age, prior_hemorrhage, hypertension) returns an error","Age outside valid range (18–120) may return a validation error","Boolean fields passed as strings instead of true/false may cause parsing errors","Payment not included or failed x402 flow returns 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need a fast, standardized ATRIA (Fang 2011) hemorrhage risk score for a patient being considered for anticoagulation therapy. Prefer this over HAS-BLED or other bleeding scores when the clinical context specifically calls for the ATRIA framework. The caller must supply pre-computed anemia and renal disease flags — do not use this endpoint if raw lab values (hemoglobin, eGFR) still need to be interpreted into boolean flags.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T01:01:52.622Z","isFirstParty":false}