Jamie is a 68 year old male with a history of hypertension presents with dizziness, palpitations, and shortness of breath. An ECG reveals a regular rhythm at 110 bpm with narrow QRS complexes and absent P waves. What is the MOST likely diagnosis?
A) Atrial fibrillation
B) Paroxysmal supraventricular tachycardia (PSVT)
C) Ventricular tachycardia
D) Sinus tachycardia
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