This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2019, Subject name: Medicine
True about Postural Hypotension: 
Select and explain. 
A. Decreases in systolic blood pressure 20 mmHg within 6 mins, B. Decreases in systolic blood pressure 20 mmHg within 3 mins, C. Decreases in diastolic blood pressure 20 mmHg within 6 mins, D. Decreases in diastolic blood pressure 20 mmHg within 3 mins
B: Decreases in systolic blood pressure 20 mmHg within 3 mins
Answer: B: Decreases in systolic blood pressure 20 mmHg within 3 mins 
Explanation: Postural Hypotension: If SBP | - >20mm Hg within 3 mins DBP| - >10mmHg when supine to standing If fall in SBP>20, DBP>10 in 3 min duration. Mx: - Salt intake | - Volume expansion - MIDODRINE (DOC) - alpha1 agonist - vasoconstriction