{"uid":"cap_UOL0ojlbjdJLYUiZuVQNz","slug":"hear-score-calculator-no-troponin-5be7cb29","name":"HEAR Score Calculator (No Troponin)","description":"HEAR score for emergency chest pain from age and caller-assigned history, ECG, and risk factors (each 0-2, max 8). No troponin. Smith 2020 very-low-risk group is scores 0 and 1 (MACE ~0.9% in that paper). Deterministic published score with citation; not a diagnosis or discharge protocol. magent does not interpret history, count risk factors, or read an ECG.","url":"https://api.magentlab.com/api/calc/hear","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":["age","history","ecg","risk_factors"],"properties":{"age":{"type":"integer","description":"Age in years (18-120). Younger than 45 scores 0; 45-64 scores 1; 65 or older scores 2 (same cuts as Six 2008 HEART)."},"ecg":{"type":"integer","description":"Caller-assigned ECG. 0 normal; 1 repolarization without significant ST depression (including BBB, LVH, digoxin, or known unchanged); 2 significant ST depression or elevation without those confounders. magent does not read an ECG."},"history":{"type":"integer","description":"Caller-assigned history. 0 nonspecific, 1 moderately suspicious, 2 highly suspicious. magent does not interpret the history."},"risk_factors":{"type":"integer","description":"Caller-assigned risk-factor points. 0 none, 1 = 1-2 risk factors, 2 = ≥3 or atherosclerotic disease. magent does not count diabetes, smoking, or other factors."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"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_xkX4AdXX4aTvMn0Wpi0_V","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 HEAR score (0–8) for emergency chest pain risk stratification using age, caller-assigned history, ECG, and risk factors — without troponin.","exampleAgentPrompt":"Calculate the HEAR score for a 67-year-old patient presenting with highly suspicious chest pain history (score 2), an ECG showing significant ST depression (score 2), and 3 or more risk factors (score 2).","exampleUseCases":[{"title":"ED triage for low-risk chest pain","prompt":"I have a 42-year-old patient in the ED with nonspecific chest pain history (score 0), a normal ECG (score 0), and no cardiac risk factors (score 0) — can you compute the HEAR score and tell me if they fall into Smith 2020's very-low-risk group?"},{"title":"Moderate-risk chest pain stratification","prompt":"Compute the HEAR score for a 55-year-old with moderately suspicious history (score 1), ECG showing repolarization changes but no significant ST depression (score 1), and one known risk factor (score 1)."},{"title":"High-risk older patient scoring","prompt":"What's the HEAR score for a 72-year-old with highly suspicious chest pain history (score 2), significant ST elevation on ECG (score 2), and known atherosclerotic disease (score 2)?"}],"resultDescription":"Returns the numeric HEAR score (integer 0–8) computed from the four caller-supplied components (age bracket, history, ECG, risk factors), plus an indication of whether the score falls in the Smith 2020 very-low-risk group (scores 0–1, associated with ~0.9% MACE). The score is deterministic and cites published methodology; it is not a diagnosis or discharge recommendation.","failureModes":["Missing required query parameters (age, history, ecg, risk_factors) returns an error","Age out of range (below 18 or above 120) may return a validation error","Integer inputs outside 0–2 for history, ecg, or risk_factors return a validation error","Payment not included or insufficient USDC results in 402 Payment Required","Caller-assigned scores that do not accurately reflect clinical findings will produce a valid but clinically misleading score — the API cannot verify inputs"],"whenToPreferThis":"Use this endpoint when you need a fast, deterministic HEAR score for emergency chest pain triage and troponin results are not yet available or not included in the workflow. Prefer it over full HEART score calculators when troponin is intentionally omitted. Ideal for ED clinical decision support pipelines that require a citable, published rule (Smith 2020 / Six 2008 HEART age cutoffs) rather than a probabilistic model.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:18:24.442Z","isFirstParty":false}