Sinus Bradycardia

  1. General information
    1. A slowed heart rate initiated by SA node
    2. Caused by excessive vagal or decreased sympathetic tone, MI, intracranial tumors, meningitis, myxedema, cardiac fibrosis; a normal variation of the heart rate in well-trained athletes
  2. Assessment findings
    1. Rate: less than 60 beats/minute
    2. Rhythm: regular
    3. P wave: precedes each QRS with a normal contour
    4. P-R interval: normal
    5. QRS complex: normal
  3. Treatment: usually not needed; if cardiac output is inadequate, atropine and isoproterenol (Isuprel) are usually prescribed; if drugs are not effective, a pacemaker may need to be inserted (see Pacemakers).

1 comments:

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