[Clinical significance of endogenous digitalis-like substances in patients with pregnancy-induced hypertension].
We measured plasma endogenous digitalis-like substances (EDLS), angiotensin II concentrations and plasma renin activity (PRA) by radioimmunoassay in 30 patients with pregnancy-induced hypertension (PIH), 30 normal pregnant women during the third trimester, and 23 non-pregnant women. Compared to the normal pregnant women, the concentration of plasma EDLS was significantly increased in patients with PIH (P < 0.05). There were significant positive correlations among plasma EDLS level, mean arterial pressure (r = 0.615; P < 0.01), the score index of PIH patients (r = 0.818; P < 0.01), hematocrit (r = 0.853; P < 0.01) and uric gravity (r = 0.764; P < 0.01). There was a significant negative correlation between plasma EDLS level and PRA in patients with PIH (r = -0.718; P < 0.01). Severe proteinuria and edema were related to a significant higher plasma EDLS level than the mild in patients with PIH (P < 0.001). After magnesium sulfate was administered in 9 severe patients of PIH, plasma EDLS levels were decreased (P > 0.05). These findings suggest that EDLS may play an important role in the pathogenesis of PIH and severe as an indicator of the severity of PIH. Its secretion may not be influenced after the administration of magnesium sulfate. There may be a close relationship between EDLS and renin-angiotensin system. When the medicine of digitalis type was administered in patients with PIH, the influence of EDLS must be considered to prevent digitalism.
Department of Obstetrics and Gynecology, Third Military Medical University, Chongqing.
S S
SS
Gao
Z Q
ZQ
Chen
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YQ
Xu
D000328:Adult; D000804:Angiotensin II / Q000097:blood; D001798:Blood Proteins / Q000378:metabolism*; D002298:Cardenolides; D004077:Digoxin; D005260:Female; D006801:Humans; D011225:Pre-Eclampsia / Q000097:blood*; D011247:Pregnancy; D012083:Renin / Q000097:blood; D012503:Saponins; D000254:Sodium-Potassium-Exchanging ATPase / Q000037:antagonists & inhibitors* / Q000097:blood
D001798:Blood Proteins; D002298:Cardenolides; D012503:Saponins; C034504:digoxin-like factors; D000804:Angiotensin II; D004077:Digoxin; D012083:Renin; D000254:Sodium-Potassium-Exchanging ATPase