This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ECG and Arrhythmia 2, Subject name: Medicine
[{'content': 'The given ECG of a neonate born to a mother with SLE shows? \nSelect and explain. \nA. Complete hea block, B. Mobitz I hea block, C. Mobitz II hea block, D. Sick sinus syndrome', 'role': 'user'}, {'content': "Answer: A \nExplanation: The atrial rate is approximately 100 bpm (RED TRACING) and ventricular rate is 40 bpm (BLUE TRACING). Since the two rates are independent it suggests complete hea block/ AV dissociation. Causes of complete hea block: Inferior wall MI AV conduction blocking drugs ,CCB, beta blockers and digoxin Degeneration of conducting system (Lenergre's or Lev's disease) Neonatal lupus (anti- Ro antibody)", 'role': 'assistant'}]