{"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::ECHO_BEFORE_SURGERY_SS","issue_slug":"vascular","doc_id":"ECHO_BEFORE_SURGERY_SS","title":"Routine Preoperative Echocardiography Before Noncardiac Surgery","doi":"10.62487/saimsara32c0f8b3","doi_url":"https://doi.org/10.62487/saimsara32c0f8b3","version":"2026-05-31","source_name":"Semantic Scholar","article_url":"https://saimsara.com/sessions/routine-preoperative-echocardiography-noncardiac-surgery-20260531-133732-32c0f8b3/","image_url":"","topic_tags":"preoperative echocardiography,noncardiac surgery,perioperative risk stratification,transthoracic echocardiography,dobutamine stress echocardiography,major adverse cardiac events,left ventricular ejection fraction,diastolic dysfunction,mitral regurgitation,appropriate use criteria","keywords":["preoperative echocardiography","noncardiac surgery","perioperative risk stratification","transthoracic echocardiography","dobutamine stress echocardiography","major adverse cardiac events","left ventricular ejection fraction","diastolic dysfunction","mitral regurgitation","appropriate use criteria"],"metrics":{"included_all":223,"included_original":154,"reference_index":72,"total_participants":5326296},"discover_url":"https://saimsara.com/api/v1/discover.php?doc_key=vascular%3A%3AECHO_BEFORE_SURGERY_SS","paid_evidence_url":"https://saimsara.com/api/v1/evidence.php?doc_key=vascular%3A%3AECHO_BEFORE_SURGERY_SS","price":{"amount":"5.00","currency":"USD","units":5,"unit_amount":"1.00"},"payment_methods":["api_key","stripe_checkout","object_grant","x402"],"text_length":16948,"preview":"Results Key finding aligned to the query: The most robust and replicated signal across the evidence base is that routine preoperative echocardiography in unselected populations undergoing noncardiac surgery yields a low prevalence of clinically actionable abnormalities and provides limited incremental prognostic value over validated clinical risk indices or cardiac biomarkers. In elective surgical cohorts without clinical suspicion of heart disease, the rate of abnormal findings on resting transthoracic echocardiography (TTE) is low, ranging from 0.8% to 9%, and these findings rarely alter perioperative management. Large-scale analyses demonstrate that preoperative echocardiography is freque…","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::ECHO_BEFORE_SURGERY_SS"},"optional_params":{"customer_email":"user@example.com"},"price":{"amount":"5.00","currency":"USD","units":5,"unit_amount":"1.00"},"curl_example":"curl -X POST https://saimsara.com/create_checkout_session.php -d \"plan=evidence_object\" -d \"doc_key=vascular::ECHO_BEFORE_SURGERY_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%3AECHO_BEFORE_SURGERY_SS","curl_example":"curl -H \"X-SAIMSARA-Payment-Proof: YOUR_PAYMENT_PROOF_TOKEN\" \"https://saimsara.com/api/v1/evidence.php?doc_key=vascular%3A%3AECHO_BEFORE_SURGERY_SS\""}}}