This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Medicine
[{'content': 'A 68-year-old male admitted to ICU for acute exacerbation of COPD develops a sudden onset of palpations. The following ECG changes are seen. What is the most likely diagnosis? \nSelect and explain. \nA. AF, B. Ventricular tachycardia, C. AMI, D. MAT', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. (D) MAT(Ref. Harrison's Principle of Internal Medicine 20th Ed; Page No-1733 and 1745)ECG shows narrow complex tachycardia with irregular rhythm.Since P waves are seen it rules out AEDifferent morphologies of P waves (>=3) in lead II rules out Sinus arrhythmia.All the above said features confirm MAT.Also absence of chest pain & significant ST elevations rules out AMI.Multifocal Atrial Tachycardia (MAT)ECG FindingsHeart rate typically between 100-150 bpm.Irregularly irregular rhythm with varying PP, PR and RR intervals.At least 3 distinct P-wave morphologies in the same lead.Isoelectric baseline between P-waves (i.e. no flutter waves).", 'role': 'assistant'}]