question: Q:A 59-year-old male with a history of hypertension presents with chest pain and hoarseness. Patient reports that his hoarseness onset gradually approximately 2 weeks ago and has steadily worsened. He states that approximately 2 hours ago he had sudden onset chest pain which has not improved. The patient describes the chest pain as severe, sharp in character, localized to the midline and radiating to the back. Past medical history is significant for hypertension diagnosed 10 years previously, which was being managed medically, although patient admits he stopped taking his medication and has not been to his doctor in the last couple of years. No current medications. Patient admits to a 20-pack-year smoking history.
  Vital signs are temperature 37 °C (98.6 °F), blood pressure 169/100 mm Hg, pulse 85/min, respiration rate 19/min, and oxygen saturation 98% on room air. On physical exam, patient is diaphoretic and in distress. Cardiac exam is significant for an early diastolic murmur. Lungs are clear to auscultation. Remainder of physical exam is normal. While performing the exam, the patient suddenly grips his chest and has a syncopal episode. He cannot be roused. Repeat vital signs show blood pressure 85/50 mm Hg, pulse 145/min, respiration rate 25/min, and oxygen saturation 92% on room air. Extremities are pale and cool.
  Patient is intubated. High flow supplemental oxygen and aggressive fluid resuscitation are initiated. Type and crossmatch are ordered. Which of the following is the next best step in management?? 
  {'A': 'Chest X-ray', 'B': 'EKG', 'C': 'Transthoracic echocardiography', 'D': 'Cardiac troponins', 'E': 'Emergency surgery'},