In contrast with arrhythmic causes, electromechanical dissociation causing cardiac arrest has very different mechanisms. The electrical activity of the heart may be near normal, or at least compatible with cardiac output. However, the precipitating cause prevents this electrical activity from producing output.
The causes are summarized in Tab!". Since the primary defect is often unrelated to the myocardium, treatment efforts are directed to the specific correction, for example volume replacement for hypovolemia, decompression of tension pneumothorax, etc.
Table 3 Causes of electromechanical dissociation Chapter References
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