Myocarditis electrocardiogram: Difference between revisions
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Varun Kumar, M.B.B.S.
Electrocardiogram
EKG findings in myocarditis are similar to those in pericarditis and myocardial infarction[1][2]. Myocarditis should be suspected in patients who are at low risk for MI and in those with normal coronaries on angiogram.
The ECG findings most commonly seen in myocarditis are[3]:
- Sinus tachycardia
- Diffuse T wave inversions
- ST segment elevation without reciprocal depression. This helps in differentiating myocarditis from infarction particularly when EKG changes are diffuse.
- Low voltage QRS may also be observed.
- Arrhythmias such as atrial and ventricular ectopics, tachycardias and fibrillations may also be present and is common in Chagas heart disease.
- Heart blocks are frequently observed in idiopathic giant cell myocarditis and cardiac sarcoidosis.
High rates of death or cardiac transplantations are associated with Q waves or left bundle branch block[4]
These EKG changes may persist for few months before they resolve spontaneously.
References
- ↑ Miklozek CL, Crumpacker CS, Royal HD, Come PC, Sullivan JL, Abelmann WH (1988). "Myocarditis presenting as acute myocardial infarction". Am Heart J. 115 (4): 768–76. PMID 3354405.
- ↑ Wang K, Asinger RW, Marriott HJ (2003). "ST-segment elevation in conditions other than acute myocardial infarction". N Engl J Med. 349 (22): 2128–35. doi:10.1056/NEJMra022580. PMID 14645641.
- ↑ Feldman AM, McNamara D (2000). "Myocarditis". N Engl J Med. 343 (19): 1388–98. doi:10.1056/NEJM200011093431908. PMID 11070105.
- ↑ Nakashima H, Katayama T, Ishizaki M, Takeno M, Honda Y, Yano K (1998). "Q wave and non-Q wave myocarditis with special reference to clinical significance". Jpn Heart J. 39 (6): 763–74. PMID 10089938.