Monday, October 14, 2013

Hyperaldosteronism(醛固酮過多)=Conn syndrome

症狀/併發症(symptom/complication)
3H
@Hypernatremia
@hypokalemia:  function of aldosterone is sodium retention, discharge of potassium
@hypertension with left ventrical hypertrophy, due to too extracellular fluid volume
@increased reabsorption of sodium will cause water retention
@Low potassium can affect the heart muscle function and neurological problems such as @weakness, @numbness, @weakness, @tonic contraction, @visual disturbances, @sweating
complication
@diabetes mellitus
@weight gain
@usually monolateral
@proteinuria: hypertension is a reason
@Increases tubular hydrogen ion secretion and @mild alkalosis
病因(etiology)
|Zona glomerulosa tissue abnormal
|primary hyperaldosteronism: #plasma renin is low
||secret too much aldosterone
|secondary hyperaldosteronism (this is not Conn syndrome): #plasma renin is high physiological mechanism in order to increase body blood volume
||Renal blood flow deficiency
||low blood volume
||water species and
||pregnancy
pathology
|Aldosterone-producing adenoma, APA 35%
|Idiopathic hyperaldosteronism, IHA 60%
|Adrenocortical carcinoma <1%
|Glucocorticoid-remediable aldosteronism, GRA
|function loss of sodium retention, discharge of potassium
檢查/準則(examination/criteria)
#screen test
##Plasma aldosterone (PA) / plasma renin activity (PRA) > 30 : renin will stimulate aldosterone production, therefore, high aldosterone will inhibit renin secretion-->90% sensitivity, 91% specificity
#confirm test
##鈉負荷試驗(Sodium loading test)
##Captopril test: Captopril 50 mg and wait 90 minutes to detect plasma aldosterone, if >15ng/dl that is positive
##intravenous saline infusion test
##fludrocortisone suppression test
治療(treatment)

鑑別診斷(Differential Diagnosis)

流行病學(Epidemiology)
+female:male=2:1
+30~50 years old

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