{"ok":true,"api":{"name":"SAIMSARA Evidence Object Discovery API","version":"v1"},"mode":"doc_key","editorial_verification":{"status":"human_reviewed","trust_label":"machine_generated_human_reviewed","method":"World ID proof-of-human editorial account","scope":["clinical_integrity","reference_quality","scientific_coherence"],"verification_note":"This Evidence Object is machine-generated and human-reviewed. World ID is used to verify that editorial oversight was submitted by a unique human account.","does_not_mean":"World ID verifies proof-of-human editorial oversight; it does not independently certify the scientific truth of every claim."},"object":{"object_type":"saimsara_evidence_object_metadata","doc_key":"vascular::PREOPERATIVE_ECG_SS","issue_slug":"vascular","doc_id":"PREOPERATIVE_ECG_SS","title":"Routine Preoperative ECG for Cardiac Risk Stratification Before Noncardiac Surgery","doi":"10.62487/saimsara5e9e7a10","doi_url":"https://doi.org/10.62487/saimsara5e9e7a10","version":"2026-05-31","source_name":"Semantic Scholar","article_url":"https://saimsara.com/sessions/routine-preoperative-ecg-noncardiac-surgery-20260531-133914-5e9e7a10/","image_url":"","topic_tags":"preoperative electrocardiogram,noncardiac surgery,perioperative risk assessment,routine ECG screening,cardiovascular risk prediction,preoperative testing guidelines,postoperative cardiac complications,deep learning ECG analysis,myocardial injury after noncardiac surgery,low-value preoperative care","keywords":["preoperative electrocardiogram","noncardiac surgery","perioperative risk assessment","routine ECG screening","cardiovascular risk prediction","preoperative testing guidelines","postoperative cardiac complications","deep learning ECG analysis","myocardial injury after noncardiac surgery","low-value preoperative care"],"metrics":{"included_all":152,"included_original":105,"reference_index":42,"total_participants":4229860},"discover_url":"https://saimsara.com/api/v1/discover.php?doc_key=vascular%3A%3APREOPERATIVE_ECG_SS","paid_evidence_url":"https://saimsara.com/api/v1/evidence.php?doc_key=vascular%3A%3APREOPERATIVE_ECG_SS","price":{"amount":"7.00","currency":"USD","units":7,"unit_amount":"1.00"},"payment_methods":["api_key","stripe_checkout","object_grant","x402"],"text_length":12647,"preview":"Results Key finding aligned to the query: The evidence reveals a fundamental paradox: standard visual interpretation of a routine preoperative ECG provides limited incremental prognostic value for postoperative major adverse cardiac events (MACE) in asymptomatic patients undergoing low-to-intermediate risk noncardiac surgery, yet the raw ECG waveform, when analyzed by deep learning algorithms, emerges as a powerful predictor of postoperative mortality. Multiple prospective studies demonstrate that preoperative ECG abnormalities are not independently associated with myocardial injury after noncardiac surgery (MINS) or 1-year MACE, and routine testing does not reduce complications or cancellat…","trust_label":"machine_generated_human_reviewed","editorial_verification":{"status":"human_reviewed","trust_label":"machine_generated_human_reviewed","method":"World ID proof-of-human editorial account","scope":["clinical_integrity","reference_quality","scientific_coherence"],"verification_note":"This Evidence Object is machine-generated and human-reviewed. World ID is used to verify that editorial oversight was submitted by a unique human account.","does_not_mean":"World ID verifies proof-of-human editorial oversight; it does not independently certify the scientific truth of every claim."},"checkout":{"method":"POST","url":"https://saimsara.com/create_checkout_session.php","content_type":"application/x-www-form-urlencoded","params":{"plan":"evidence_object","doc_key":"vascular::PREOPERATIVE_ECG_SS"},"optional_params":{"customer_email":"user@example.com"},"price":{"amount":"7.00","currency":"USD","units":7,"unit_amount":"1.00"},"curl_example":"curl -X POST https://saimsara.com/create_checkout_session.php -d \"plan=evidence_object\" -d \"doc_key=vascular::PREOPERATIVE_ECG_SS\" -d \"customer_email=user@example.com\""},"access_after_payment":{"header":"X-SAIMSARA-Payment-Proof","endpoint":"https://saimsara.com/api/v1/evidence.php?doc_key=vascular%3A%3APREOPERATIVE_ECG_SS","curl_example":"curl -H \"X-SAIMSARA-Payment-Proof: YOUR_PAYMENT_PROOF_TOKEN\" \"https://saimsara.com/api/v1/evidence.php?doc_key=vascular%3A%3APREOPERATIVE_ECG_SS\""}}}