When patients with normal blood pressure experience a drop in blood pressure upon rising to an upright position and have symptoms of light-headedness or dizziness,the condition is known as:

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Orthostatic hypotension,also referred to as postural hypotension,is a reduction of systolic blood pressure (SBP)of at least 20 mm Hg or reduction of diastolic blood pressure (DBP)of at least 10 mm Hg within 3 minutes of quiet standing.It occurs when patients with normal blood pressure experience a drop in blood pressure upon rising to an upright position and it is associated with symptoms of lightheadedness or dizziness.Hypotension is a SBP less than 90 mm Hg or a DBP less than 60 mm Hg.The most common alteration in blood pressure is hypertension,an often asymptomatic disorder characterized by persistently elevated BP.Hypertension is defined as SBP greater than 140 mm Hg,DBP greater than 90 mm Hg.The difference between systolic and diastolic pressure is the pulse pressure.For a blood pressure of 120/80 mm Hg,the pulse pressure is 40.

When Patients with Normal Blood Pressure Experience a Drop in Blood