You have been called for a male patient who began complaining of chest discomfort while receiving hemodialysis. Assessment shows no threats to the airway, breathing, or circulation. His vital signs and blood sugar are normal. Which question should you ask first?

A) "Was the dialysis session completed?"
B) "How were you feeling prior to the dialysis session?"
C) "How many sessions does he have each week?"
D) "When did you eat or drink last?"

A) "Was the dialysis session completed?"