A young lady complains of sudden onset of palpitations, extreme weakness and sweating. On examination, she was found to have B.P. 90/70 with a regular pulse rate of 180/minute. Her symptoms disappeared after vomitting but she complained of polyuria. The most likely diagnosis is: (A) Primary thyrotoxicosis, (B) Acute anxiety state, (C) Paroxysmal atrial tachycardia, (D) Paroxysmal atrial flutter
Answer is C. None