R wave height ≤ 3 mm in V3.
- Poor R wave progression secondary to prior anteroseptal MI
- Poor R wave progression due to electrode misplacement (leads V1 and V3 reversed)
- Mattu A, Brady W. ECGs for the Emergency Physician 2, BMJ Books 2008.
- ECG BASICS — Waves, Intervals, Segments and Clinical Interpretation
- ECG A to Z by diagnosis –alphabetical diagnostic approach to the ECG
- ECG CLINICAL CASES — ECG’s placed in clinical context with a challenging Q&A approach
- 100 ECG Quiz — Self-assessment tool for examination practice
- ECG Reference SITES and BOOKS — the best of the rest
- LITFL ECG IMAGE Database — Searchable database of LITFL ECG’s
- ECG and Cardiology Eponymous Syndromes — Cheats guide to eponymous emancipation
- ECG Exam Template — a framework for answering ECG exam questions.