Sinus Tachycardia



  1. General information
    1. A heart rate of over 100 beats/minute, originating in the SA node
    2. May be caused by fever, apprehension, physical activity, anemia, hyperthyroidism, drugs (epinephrine, theophylline), myocardial ischemia, caffeine
  2. Assessment findings
    1. Rate: 100-160 beats/minute
    2. Rhythm: regular
    3. P wave: precedes each QRS complex with normal contour
    4. P-R interval: normal (0.08 second)
    5. QRS complex: normal (0.06 second)
  3. Treatment: correction of underlying cause, elimination of stimulants; sedatives, propranolol (Inderal).

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