This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': "Which of the following ECG changes in an Asymptomatic Athlete's Hea should be considered pathological'? \nSelect and explain. \nA. Increased amplitude of QRS, B. Second Degree (Mobitz 2) hea block, C. Prominent U Waves, D. T Wave inversion", 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer is B (Second Degree (Mobitz 2) hea block) Second Degree (Mobitz 2) hea block should he considered a pathological finding in an Athletes Electrocardiogram. `Various degrees of atrioventricular blocks have been described in endurance athletes. First Degree Blocks and Second Degree (Mobitz Type- 1) are a common finding. However second degree (Mobitz type -2) and third degree blocks are pretty rare and should be considered pathological' The athletic hea syndrome - Spos Cardiology: From Diagnosis to Clinical Management (Springer) 2012/ 18, 19 Benign findings Physical exam * Grades 1 and 2 systolic ejection murmurs * Split S2 * S3 or S4 ECG changes * Sinus arrhythmia * Sinus bradycardia * First-degree hea block * Second-degree hea block (Mobitz 1) * Junctional escape beats * Voltage criteria for hyperophy (High QRS Voltage) * Early repolarization * Incomplete right bundle branch block * P wave increases in amplitude and duration * Tall peaked T Waves * T-wave flattening for inversion that normalizes with exercise * Prominent U waves Pathologic findings Physical exam * Systolic murmurs at the lower sternal border augmented by Valsalva and decreased with squatting * Diastolic murmurs ECG changes * Down-sloping ST-segment depression * ST elevation with broad T waves * Significant Q waves (anterior or inferior pattern) * Delta waves (Wolff-Parkinson-white) * Second-degree hea block (Mobitz 2) * Third-degree hea block * Prolonged QTC interval * LVH with ST-T wave strain pattern These findings assume an asymptomatic athlete. If an athlete is symptomatic or a possible pat o og c n ng tsfoun fuher workup is indicated.", 'role': 'assistant'}]