Treatment of ohostatic hypotension is-
**Core Concept**
Ohostatic hypotension, also known as postural hypotension, is a condition characterized by a significant drop in blood pressure upon standing, leading to dizziness or fainting. This condition is often caused by autonomic nervous system dysfunction, particularly affecting the sympathetic nervous system's ability to regulate blood pressure in response to changes in posture.
**Why the Correct Answer is Right**
The treatment of orthostatic hypotension typically involves measures to increase blood volume or improve sympathetic nervous system function. One effective approach is to use medications that stimulate alpha-adrenergic receptors, such as midodrine. Midodrine works by constricting blood vessels, thereby increasing peripheral resistance and blood pressure. This is particularly beneficial when patients stand up from a lying or sitting position.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because beta-blockers, such as propranolol, can actually worsen orthostatic hypotension by blocking the effects of sympathetic nervous system stimulation on the heart and blood vessels.
**Option B:** This option is incorrect because vasopressin, a hormone that constricts blood vessels, may be used to treat certain cases of orthostatic hypotension, but it is not the first-line treatment and can have significant side effects.
**Option C:** This option is incorrect because fludrocortisone, a synthetic corticosteroid, can be used to treat orthostatic hypotension caused by adrenal insufficiency, but it is not the primary treatment for orthostatic hypotension in general.
**Clinical Pearl / High-Yield Fact**
One key point to remember is that orthostatic hypotension can be caused by a wide range of underlying conditions, including autonomic nervous system disorders, dehydration, and certain medications. Therefore, it is essential to investigate and address the underlying cause of the condition, rather than simply treating the symptoms.
**Correct Answer: C. Midodrine**