Final answer:
The condition described is pre-eclampsia, a serious pregnancy complication linked to hypertension and characterized by elevated blood pressure, proteinuria, and other symptoms such as pitting edema and blurred vision.
Step-by-step explanation:
The condition described in the question, characterized by a blood pressure of 140/90 mm Hg or higher accompanied by proteinuria, pitting edema of the ankles, blurred vision, 3+ deep tendon reflexes (DTR), photophobia, oliguria, and epigastric pain, is known as pre-eclampsia. This is a serious pregnancy complication associated with hypertension and can have significant consequences for both the mother and the fetus if left untreated. During pregnancy, circulatory system changes occur, including an increase in blood volume by approximately 30 percent, which can contribute to the development of complications like pre-eclampsia.