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14 Cards in this Set
- Front
- Back
- 3rd side (hint)
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T or F In normal response to standing 500 to 1000 mL of blood is pooled to lower extremities |
T |
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Mention the sequence initiated by normal response to standing ? |
1. Venous return ⬇ rapid 2. ⬇ ventricular filling ➡ ⬇output & ⬇blood pressure 3. ⬇blood pressure ➡( compensatory reflex ) by CNS➡ ⬆sympasatic & ⬇parasymathetic outflow 4. The ⬆sympasatic ➡ ⬆peripheral vascular resistance & ⬆ venous return & ⬆ cardiac output ➡lemites ⬇ blood pressure 5.that mechanism leads to . small ⬇ in systolic blood pressure ( 5 to 10) mmHg . ⬆ diastolic blood pressure (5 to 10 ) mmHg . ⬆ in pulse rate (10 to 25 beats per minutes) |
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Definition Baroreceptor reflex |
Its the CNS responds to fall of blood pressure which leads to increase sympathetic and reduces parasympathetic out flow . Important |
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T or F Orthostatic hypo tension is more commen in the young due to at least part to impaired baroreflex sensitivity |
F, Young ❌ Elderly ✔ |
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Definition Autonomic failure |
It is a disorder of noradrenergic neurotransmission in which post ganglionic sympathetic neurons do not release norepinephrine appropriately |
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T or F Subnormal norepinephrine results in ➡impaired vasoconstriction ➡reduced intrathoracic vascular volume |
T 🔴note Both of these items ➡ orthostatic hypotension |
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T or F The presence of a heart rate increase surly exclude autonomic failure |
F Surly ❌ Does not ✔ |
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Complete Heart rate usually decrease during................. While it increase during autonomic failure |
Reflex syncope |
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Complete Young patient have been described with COI and devolped variety of symptom are more likely to associate with ......................with little or no fall in blood pressure |
Postural tachycardiac syndrome |
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Definition Chronic orthostatic intolerance |
The association of lightheadedness, dizziness , faintness or syncope |
Long upright or standing posture causes syncope |
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Define Postprandial hypotension |
Pooling of blood in the splanchnic circulation due to have inadequate sympathetic compensation to meal |
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T Or F All of the following happen when blood pool in splanchic circulation except .)impaired maintenance of cardiac out put .)systemic vascular resistance .)vasodilatation by (insulin ) .)hypertension |
Hypertension |
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Complete Within 2 to 5 min of quiet standing after 5 min of spinal rest ...............fall in systolic pressure ...............fall in diastolic pressure |
20 mmHg 10 mmHg |
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T it f In orthostatic hypotension we diagnosis symptoms of cerebral hypoperfusion |
T 🔴note also heart rate ⬆ >30 BPM ➡postural tachycardia |
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