On admitting a patient, the nurse finds a history of myocardial ischemia. What is the most disconcerting dysrhythmia that electrocardiography can reveal for this patient?
a. Sinus bradycardia
b. Sinus dysrhythmias
c. Ventricular tachycardia
d. Atrial fibrillation
C
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A Sinus bradycardia would not be of concern for this patient. It is of no clinical significance unless it is associated with signs and symptoms of a decreased cardiac output.
B Sinus dysrhythmia is of no clinical significance unless dizziness occurs with a decreased heart rate.
C Ventricular tachycardia would be the most disconcerting dysrhythmia of the four options. Ventricular tachycardia results in a decreased cardiac output; it may lead to severe hypotension, loss of pulse, and unconsciousness.
D Atrial fibrillation is not as detrimental as ventricular tachycardia.
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