system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 28-year-old woman, gravida 1, para 0, at 32 weeks' gestation is admitted to the hospital for the management of elevated blood pressures. On admission, her pulse is 81/min, and blood pressure is 165/89 mm Hg. Treatment with an intravenous drug is initiated. Two days after admission, she has a headache and palpitations. Her pulse is 116/min and regular, and blood pressure is 124/80 mm Hg. Physical examination shows pitting edema of both lower extremities that was not present on admission. This patient most likely was given a drug that predominantly acts by which of the following mechanisms?
assistant
Direct dilation of the arterioles