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SUMMARY Early differences in hemodynamic variables and vasoactive substances between progeny of hypertensive and normotensive parents were sought in normotensive children aged 10-17 years. Forty-two black and 34 white children of hypertensive parents (cases) and an age-balanced group of 20 black and 45 white children of normotensive parents (controls)(More)
Heart rate, systolic and diastolic blood pressure, rate-pressure product and electrocardiographic changes were measured in 288 healthy children during treadmill exercise. A constant speed (3.5 miles/hour) protocol was used to facilitate the measurements of physiologic data during exercise. Because responses to exercise vary with size, the children were(More)
To explore the racial differences in blood pressure levels in American youth, and to extend current data to include youth of Asian, black, Hispanic, and non-Hispanic white descent, we recorded blood pressures among ninth graders during the spring of the years 1985 to 1989 in a suburb of Los Angeles. Trained observers, following a standardized protocol,(More)
BACKGROUND Intake of calcium from the diet is inversely associated with blood pressure in observational studies and animal models but randomized trials in humans have found only small effects of calcium supplementation on blood pressure. A blood pressure-lowering effect of calcium supplementation may thus be restricted to persons with a low intake of(More)
Bradycardia followed by cardiac arrest is well documented as a complication of acute injury to the cervical spinal cord. This life-threatening bradycardia is attributed to an imbalance in the autonomic nervous system resulting from dissociation of the parasympathetic from the sympathetic responses during the stage of spinal shock. A patient with a C2(More)
Differences in blood pressure among individuals of African ancestry living in the United States compared with those living in Africa suggest that the high prevalence of hypertension among African Americans may be due in part to environmental factors. There are a number of environmental models that attempt to account for the high rate of hypertension among(More)
We have used the St. Jude Medical cardiac valve prosthesis without postoperative anticoagulation in 34 children undergoing valve replacement since March, 1979. The 19 boys and 15 girls ranged in age from 9 months to 21 years. The valve replaced was mitral in 12 patients, aortic in 14, pulmonary in three, and both mitral and aortic in two. One patient had(More)