![]() The 4 general steps for ECG assessment include evaluation of heart rate, cardiac rhythm, mean electrical axis, and assessment for patterns of chamber enlargement. Consequences of an arrhythmia may be clinically undetectable, produce signs of inadequate cardiac output (eg, weakness, fainting, shock), or lead to complete collapse of the circulatory system and sudden death. The level of cardiac performance during an arrhythmia depends on rate, site of origin, and duration of the arrhythmia, as well as the presence of underlying cardiac or systemic diseases that may adversely affect the patient. Arrhythmias are clinically important because of their ability to compromise cardiac output and oxygen delivery to the body. ![]()
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