What's inside
The reference guide is modeled after the best English-language ECG libraries: each term is a dedicated page featuring a definition, ECG criteria with numerical values, mechanism, causes, differential diagnosis, management, common pitfalls, and self-assessment questions. The terminology covers international ECG libraries as well as the Russian school of electrocardiography (Orlov, Murashko, Strutynsky).
How articles are written
The text is generated by a language model based on a specified structure and clinical guidelines: AHA/ACCF/HRS recommendations for ECG standardization, ESC guidelines on ACS, arrhythmias, and pacing, clinical guidelines of the Russian Ministry of Health, and classic textbooks. Then, two other models independently review every statement—primarily thresholds in millimeters and milliseconds, leads, eponyms, and correct test answers. The author revises the article based on feedback, and the review process is repeated. Articles where a serious concern remains after three review rounds are not published in the search index until proofread by a physician.
Traces
The diagrams under each term are drawn by our editorial team: these are educational illustrations of the sign on millimeter paper (25 mm/s, 10 mm/mV), not real patient recordings. Real ECGs are sourced from the open PTB-XL dataset (PhysioNet, 21,799 recordings annotated by cardiologists), CC BY 4.0 license. We select high-quality recordings where the target sign is prominent.
Physician review and errors
Beneath the title of each article is a "Report an error" button—the message goes directly to the team, and an editor physician reviews and corrects the text. The reference guide is an educational material: it does not replace clinical guidelines and cannot serve as the basis for a diagnosis without a physical examination.