Free · 20 rhythms · AHA-sourced
EKG rhythms, walked through.
The 20 most common rhythms with annotated strips, criteria (rate, regularity, P waves, PR, QRS), and what to do. Click any rhythm in the sidebar. Educational only.
Educational reference only. Real rhythm interpretation requires a 12-lead EKG and clinical correlation. Always treat the PATIENT, not the rhythm — check pulse and assess symptoms before intervention. This tool is not a substitute for AHA ACLS certification.
References (APA)
American Heart Association. (2020). 2020 American Heart Association guidelines for cardiopulmonary resuscitation and emergency cardiovascular care. Circulation, 142(16 Suppl 2), S337-S604.
Wagner, G. S., & Strauss, D. G. (2024). Marriott's practical electrocardiography (13th ed.). Wolters Kluwer.
January, C. T., Wann, L. S., Calkins, H., Chen, L. Y., Cigarroa, J. E., Cleveland, J. C., ...Yancy, C. W. (2019). 2019 AHA/ACC/HRS focused update of the 2014 AHA/ACC/HRS guideline for the management of patients with atrial fibrillation. Circulation, 140(2), e125-e151.
Joglar, J. A., Chung, M. K., Armbruster, A. L., Benjamin, E. J., Chyou, J. Y., Cronin, E. M., ...Wann, L. S. (2024). 2023 ACC/AHA/ACCP/HRS guideline for the diagnosis and management of atrial fibrillation. Circulation, 149(1).
Surawicz, B., Childers, R., Deal, B. J., & Gettes, L. S. (2009, reaffirmed). AHA/ACCF/HRS recommendations for the standardization and interpretation of the electrocardiogram. Circulation, 119(10), e235-e240.