{"uid":"cap_KTSN7KcFgZkSwjW7nif0n","slug":"driver-2017-subtle-lad-occlusion-vs-early-repolarization-calculator-4-bc17be72","name":"Driver 2017 Subtle LAD Occlusion vs Early Repolarization Calculator (4-Variable Formula)","description":"Driver 2017 4-variable formula for normal-variant STE in V2-V4 (early repolarization) versus subtle LAD occlusion: formula_value = 0.052*QTc_ms - 0.151*QRS_V2_mm - 0.268*R_V4_mm + 1.062*STE60_V3_mm, 3 decimals. lad_occlusion_suggested is true iff the value is ≥18.2 (derivation highest-accuracy cutpoint). Intended only when ≥1 mm STE in V2-V4 without obvious occlusion features. magent does not read the ECG. Not a STEMI diagnosis, cath-lab order, or 3-variable formula. Not a medical device.","url":"https://api.magentlab.com/api/calc/subtle_stemi","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":["qtc_ms","qrs_v2_mm","r_v4_mm","ste60_v3_mm"],"properties":{"qtc_ms":{"type":"number","description":"Computerized Bazett QTc in milliseconds (200-800). Driver 2017."},"r_v4_mm":{"type":"number","description":"R-wave amplitude in V4 in millimetres at standard calibration (0.1-50). Driver 2017."},"qrs_v2_mm":{"type":"number","description":"Total QRS amplitude in V2 (R+S) in millimetres at standard calibration (0.1-50). Driver 2017."},"ste60_v3_mm":{"type":"number","description":"ST elevation at 60 ms after the J-point in V3, in millimetres (0-10). Driver 2017."}}}},"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_w8RgI6GOoblSSjvwCbOGY","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 Driver 2017 4-variable formula score to distinguish subtle LAD occlusion from early repolarization (normal-variant STE) in leads V2-V4, flagging likely occlusion when score ≥18.2","exampleAgentPrompt":"Run the Driver 2017 4-variable subtle LAD occlusion formula for me: QTc is 425 ms, QRS amplitude in V2 is 18 mm, R-wave in V4 is 5 mm, and ST elevation at 60ms after J-point in V3 is 2.5 mm — is the score ≥18.2?","exampleUseCases":[{"title":"ED physician ruling out subtle anterior STEMI","prompt":"I have a patient with 1.5 mm STE in V2-V4 and no obvious occlusion features — run the Driver 2017 4-variable formula with QTc 410 ms, QRS amplitude in V2 14 mm, R-wave in V4 3 mm, and STE60 in V3 2.0 mm so I can see if LAD occlusion is suggested."},{"title":"Clinical audit pipeline scoring ECG batch","prompt":"For this ECG record: QTc 460 ms, QRS amplitude in V2 22 mm, R-wave in V4 7 mm, ST elevation 60ms past the J-point in V3 is 1.8 mm — compute the Driver 2017 subtle STEMI score and tell me whether it crosses the 18.2 cutpoint."},{"title":"Medical education tool demonstrating formula sensitivity","prompt":"Show me the Driver 2017 formula result when I change only the STE60 in V3 from 1.0 to 3.5 mm, keeping QTc at 390 ms, QRS in V2 at 16 mm, and R-wave in V4 at 4 mm — does the classification flip to LAD occlusion suggested?"}],"resultDescription":"Returns a numeric formula value rounded to 3 decimal places (computed as 0.052×QTc_ms − 0.151×QRS_V2_mm − 0.268×R_V4_mm + 1.062×STE60_V3_mm), and a boolean flag lad_occlusion_suggested that is true when the value is ≥18.2 (the derivation highest-accuracy cutpoint), and false otherwise. This is a clinical decision-support calculation only — not a diagnosis, STEMI declaration, or cath-lab order.","failureModes":["Missing required query parameter (qtc_ms, qrs_v2_mm, r_v4_mm, or ste60_v3_mm) returns a 400-level error","Out-of-range values (e.g. QTc outside 200-800 ms or STE60 >10 mm) may return a validation error or undefined behavior","Payment failure (x402) if USDC balance is insufficient or payment header is missing","Misapplication: formula not valid for patients with obvious occlusion features, LBBB, LVH, or <1 mm STE in V2-V4","Network timeout on the api.magentlab.com host"],"whenToPreferThis":"Use this endpoint when you have explicit numeric ECG measurements (QTc, QRS amplitude in V2, R-wave in V4, STE60 in V3) and need to apply the validated Driver 2017 4-variable formula to distinguish subtle anterior LAD occlusion from benign early repolarization. Prefer this over general ECG interpretation services when the clinical question is specifically this differential, the STE is ≥1 mm in V2-V4, and no obvious occlusion pattern (e.g. tombstoning) is present. Do not use for the 3-variable formula, for obvious STEMIs, or as a substitute for physician ECG reading.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:53:36.716Z","isFirstParty":false}