A 28-year-old man presents with a 2 hours' history of rapid palpitations. He feels a little light headed but is other exam: pulse=170 bpm and regular, BP=100/68 mmHg. He has had 2 similar episodes in the past.
What is the most disturbance?

An 8 year's boy has his tonsils and adenoids removed. On the 7th post-op day, he comes back to the hemoptysis and fever.
What is the most appropriate management?

45 year's female looking pale has bluish discoloration of hands whenever she goes out in the cold. She has reddish spots on her body. She has symmetrical peripheral arthroplasty for the last year.
What is the most appropriate diagnosis?

A 78-year-old woman is admitted to the intensive care unit for acute pulmonary edema. She has rales to the apices and Jugular vein distention. Her EKG shows ventricular tachycardia.
Which of the following is the best therapy?

What is the best initial investigation in a postmenopausal woman with a breast lump?