- Restrictive cardiomyopathy is the least common form of cardiomyopathy.
- It occurs in the advanced stages of myocardial infiltrative disease — e.g. due to haemochromatosis, amyloidosis or sarcoidosis.
- Diffuse myocardial infiltration leads to low voltage QRS complexes.
- Atrial fibrillation may occur due to atrial enlargement; ventricular arrhythmias are also common.
- Infiltration of the cardiac conducting system (e.g. due to septal granuloma formation in sarcoidosis) may lead to conduction disturbance — e.g. bundle branch blocks and AV block.
- Healing granulomas in sarcoidosis may produce “pseudo-infarction” Q waves.
- Low voltage QRS complexes
- Non-specific ST segment / T wave changes
- Bundle branch blocks
- Atrioventricular block (3rd degree AV block may occur in sarcoidosis)
- Pathological Q waves
- Atrial and ventricular dysrhythmias
- ECG BASICS – Waves, Intervals, Segments and Clinical Interpretation
- ECG CLINICAL CASES – Your favourite ECG’s placed in clinical context with a challenging Q&A approach
- ECG and Cardiology Eponymous Syndromes – Cheats guide to eponymous emancipation
- ECG Reference Sites on the WEB – the best of the rest
- Chan TC, Brady WJ, Harrigan RA, Ornato JP, Rosen P. ECG in Emergency Medicine and Acute Care. Elsevier Mosby 2005.
- Edhouse J, Thakur RK, Khalil JM. ABC of clinical electrocardiography. Conditions affecting the left side of the heart. BMJ. 2002 May 25;324(7348):1264-7. Review. PubMed PMID: 12028984; PubMed Central PMCID: PMC1123219 [