NREMT PARAMEDIC CARDIOLOGY EXAM 2024 LATEST VERSION WITH 110 QUESTIONS WITH CORRECT ANSWERS AND RATIONALES 2023-2024 NEWEST EXAM (BRAND NEW!!)\You respond to a residence for a 68-year-old male with nausea, vomiting, and
blurred vision. As you are assessing him, he tells you that he has congestive
heart failure and atrial fibrillation, and takes numerous medications. The cardiac
monitor reveals atrial fibrillation with a ventricular rate of 50 beats/min. Which
of the following medications is MOST likely responsible for this patient's
clinical presentation? - ANSWER-Digoxin.
This patient has classic signs of digitalis toxicity. Digoxin is commonly
prescribed to patients with congestive heart failure and atrial fibrillation (A-Fib)
or atrial flutter (A-Flutter). Its positive inotropic effects increase cardiac
contractility and maintain cardiac output, while its negative chronotropic effects
control the ventricular rate of the A-Fib or A-Flutter. Digitalis preparations (ie,
Lanoxin, Digoxin) have a narrow therapeutic index—that is, there is a fine line
between a therapeutic and toxic dose. You should suspect digitalis toxicity in
any patient who takes Digoxin or Lanoxin and presents with complaints such as
nausea, vomiting, abdominal pain, anorexia, or blurred/yellow vision.
Additionally, virtually any cardiac dysrhythmia can be caused by the toxic
effects of digitalis. Treatment involves the administration of Digibind, which is
given at the hospital.
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