NCLEX RN Quiz # 991

NCLEX Examination.

Practice Question # 991.


nclex examination.


Sinus bradycardia occurs when the sinus node creates an impulse at a slower-than-normal rate. Causes include lower metabolic needs (eg, sleep, athletic training, hypothermia, hypothyroidism), vagal stimulation (eg, from vomiting, suctioning, severe pain, extreme emotions), medications (eg, calcium channel blockers, amiodarone, beta-blockers), increased intracranial pressure, and myocardial infarction (MI), especially of the inferior wall.

The following are characteristics of sinus bradycardia All characteristics of sinus bradycardia are the same as those of normal sinus rhythm, except for the rate. The patient is assessed to determine the hemodynamic effect and the possible cause of the dysrhythmia. If the decrease in heart rate results from stimulation of the vagus nerve, such as with bearing down during defecation or vomiting, attempts are made to prevent further vagal stimulation. If the bradycardia is from a medication such as a beta-blocker, the medication may be withheld. If the slow heart rate causes significant hemodynamic changes, resulting in shortness of breath, decreased level of consciousness, angina, hypotension, ST-segment changes, or premature ventricular complexes, treatment is directed toward increasing the heart rate.

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