Marilyn Fitch is a 78-year-old Caucasian woman with a history of hypercholesteremia, hypertension, and heart failure and has NKDA. She was brought in by her daughter after Marilyn complained of feeling dizzy several times this morning and then almost passed out at home. Marilyn has a six-month history of paroxysmal atrial fibrillation. Her heart rate has been regular and she has had no episodic dizziness since she had a synchronized cardioversion one week prior to this visit. Her initial VS in t...