Dysrhythmias can be fatal to a client during the acute phase following a myocardial infarction. The nurse understands that the primary cause of this event is due to which of the following?
A) Effects on depolarization and repolarization of the myocardial cells
B) Arterial spasms are common after a myocardial infarction.
C) After a myocardial infarction, leukocytosis occurs.
D) Scar tissue has replaced healthy cardiac tissue.
A
Feedback:
Dysrhythmias during the acute phase occur because the affected areas are electrically unstable due to the shifting of electrolytes and accumulation of lactic acid, which affect the depolarization and repolarization of the myocardial cells. Arterial spasms can be a cause of MI, not a result. Leukocytosis does occur after a MI but not the cause of dysrhythmias. Scar tissue formation takes weeks to form and does not occur in the acute phase.
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