Tuesday, June 12, 2012

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Low voltage QRS complexes


Low-Voltage QRS Complexes
1.
Artifactual or spurious (especially unrecognized standardization of the ECG at half the usual gain, i.e., 5 mm/mV). Always check this first!
2.
Adrenal insufficiency (Addison's disease)
3.
Anasarca (generalized edema)
4.
Cardiac infiltration or replacement (e.g., amyloid, tumor)
5.
Cardiac transplantation, especially with acute or chronic rejection
6.
Cardiomyopathies
7.
Chronic obstructive pulmonary disease
8.
Constrictive pericarditis
9.
Hypothyroidism/myxedema (usually with sinus bradycardia)
10.
Left pneumothorax (mid-left chest leads)
11.
Myocardial infarction, usually extensive
12.
Myocarditis, acute or chronic
13.
Normal variant
14.
Obesity
15.
Pericardial effusion/tamponade (latter usually with sinus tachycardia)
16.
Pleural effusions

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