Which assessment is most important to measure or perform before administering the first dose of amitriptyline (Elavil)to a patient?

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Amitriptyline is a tricyclic antidepressant that can cause unstable ventricular dysrhythmias.Therefore heart rate and rhythm are most important to assess to establish a baseline and determine possible adverse effects of this drug.Although the drug can also lower blood pressure and increase drowsiness,changes in heart rhythm can be life-threatening.

Which Assessment Is Most Important to Measure or Perform Before