<qa>  What is the blood pressure defined by?Even if repeated labetalol is required for blood pressure control, the patient will continue to receive 200mg labetalol orally every 6 hours unless she has bradycardia or hypotension as defined by a blood pressure of 90 mmHg systolic andor 60 mmHg diastolic. If blood pressure is not controlled with labetalol the patient will have her blood pressure controlled by the delivery team using whatever other agent they choose. In those institutions where intravenous labetalol is unavailable the patient will receive an intravenous dose of 5mg hydralazine, which can be repeated every 20 minutes as necessary to control the blood pressure. 