Search PubMed⌕ Search

Biomedical subjects

H C Miller

Publications and source records attributed to H C Miller.

At least 91 records · Page 5Linked to original sources
PubMed1980

Suppressive activity of splenic adherent cells from Plasmodium chabaudi-infected mice.

The immune response of splenic cells to SRBC and LPS or Con A mitogens is suppressed in P. chabaudi-infected mice. When mixed with cells from normal donors, spleen cells from infected mice also suppressed anti-SRBC and mitogenic responses. Suppression was not detected in lymph node cells, bone marrow, or thymocytes from infected mice. Removal of infected red cells had no effect on suppression. The cell population responsible for the suppressive activity was adherent to plastic, resistant to irradiation and anti-Thy-1 plus complement treatment.

Animals↗
PubMed1980

The management of ventricular septal rupture following myocardial infarction.

Twenty-six patients were treated for ventricular septal rupture following myocardial infarction over a five year period. Twenty-three patients underwent full haemodynamic investigation with a view to surgery and nineteen underwent operative closure of the defect. Overall hospital mortality was 47 per cent in the surgical group. Eleven patients had surgery within two weeks of infarction because of marked haemodynamic deterioration soon after septal rupture but only two survived to leave hospital. Eight patients underwent operation two weeks or longer after infaction, all were alive and well at discharge from hospital, six were well at one year and four at three years. Seven patients did not undergo surgery and the maximum survival for these was eight months. No patient in cardiogenic shock before septal rupture benefited from repair. Rapid clinical deterioration following rupture carried a poor prognosis. In all the shunt was large and medical treatment was ineffective. It is concluded that early surgical repair should be considered except when cardiogenic shock antedates the septal rupture.

Aged↗
PubMed1979

Occult thyrotoxicosis: a correctable cause of "idiopathic" atrial fibrillation.

Serum total thyroxine, triiodothyronine and thyrotropin response to thyrotropin-releasing hormone were measured in 75 consecutive patients presenting to a cardiology clinic with atrial fibrillation with no obvious cardiovascular cause. A lack of response of serum thyrotropin to thyrotropin-releasing hormone, indicative of thyrotoxicosis, was found in 10 patients (13 percent), not all whom had raised serum thyroid hormone levels. These 10 patients were predominantly male, had no clinical signs of thyrotoxicosis and a relative excess of nonpalpable autonomous thyroid nodules demonstrated with scintigraphy. Eight of the 10 patients had reversion to stable sinus rhythm after treatment with iodine-131 or carbimazole, either spontaneously or after direct current cardioversion. It would appear that clinically occult thyrotoxicosis can be identified consistently only with the thyrotropin-releasing hormone test and is the cause of "idiopathic" atrial fibrillation in a significant proportion of patients.

Aged↗
PubMed1978

Rapid lymphocyte immunoreactivity test utilizing [3H]uridine in vitro.

A microculture assay utilizing [3H]uridine incorporation was developed to test murine spleen lymphocyte immunoreactivity in vitro. Parameters of the culture technique which included cell density, doses of LPS, Con A, PHA, [3H]uridine levels, and length of culture time were investigated. Responses were detectable at 4 h for all 3 mitogens, with labeling ranging up to 180% of the control value. By 8 h there was a 200--350% increase in mitogen-induced incorporation of radioactivity. Similar increases were observed in a serum-free system. The responses were the result of increased incorporation of label by stimulated cultures rather than decreased labeling of non-mitogen treated cultures over time. The [3H]uridine incorporation was demonstrated to be the selective response of T or B cell populations when stimulated with appropriate lectins. This assay detects early RNA synthesis, as supported by experimental observations in which accumulation of radioactivity in stimulated lymphocytes was TCA precipitable, resistant to SDS treatment, and inhibited by actinomycin D.

Animals↗
PubMed1977

Effects of behavioral and medical variables on fetal growth retardation.

Cigarette smoking, indulging in certain drugs, restricting maternal weight gain in pregnancy, failing to obtain sufficient prenatal care, undertaking pregnancy at too early or too advanced on age, and being underweight for height at conception have in the past been identified with either increased premature births or births of term infants with fetal growth retardation. Each of these seven variables contains an element of maternal choice and has therefore been labeled by us as a behavioral variable. The combined group of mothers having these seven behavior variables was compared to a smaller group of mothers with medical complications and to a control group of mothers with neither behavioral nor medical variables. In the control group, there was a remarkably low incidence of premature births under 37 weeks (1 per cent), of term infants who had short body lengths at birth for their fetal ages (1.4 per cent), and of low-birth-weight infants (1 per cent). As the number of seven behavioral variables increased from none to three or more per pregnancy, the incidences of premature births, of short-for-dates term infants, and of low-birth-weight infants increased proportionately and significantly. The incidences of these seven behavioral variables, occurring either singly or in combination, were inverse to the mothers' socioeconomic status. However, the incidences of premature births, of growth-retarded term infants, and of low-birth-weight infants were high among mothers who had two or more behavioral variables in their pregnancies regardless of the mothers' socioeconomic status. The group of mothers with behavioral variables in comparison to the smaller group of mothers with medical complications had lower incidences but higher absolute numbers of premature infants, of growth-retarded term infants, and of low-birth-weight infants. Mothers who had medical complications as well as behavioral variables had more growth-retarded term infants than mothers with medical complications alone.

Behavior↗
PubMed1977

Postnatal somatic growth in infants with atypical fetal growth patterns.

We differentiate patterns of postnatal physical growth in 61 fullterm newborns with either normal or atypical somatic fetal growth. At birth, 14 normal babies had average ponderal indices, 14 were overweight for length (high ponderal index), 18 were underweight for length (low ponderal index), and 15 had short crown-heel lengths for dates and normal ponderal indices. Appropriate statistical analyses determined attained and velocity growth of the four groups during the first postnatal year. Statistically significant and marked differences in postnatal growth were noted between short babies and babies with low ponderal indices. The slow postnatal growth of the short infants appeared to be a continuum of their fetal growth pattern. On the other hand, infants born with low ponderal indices accelerated their weight gains and reversed the malnourished state in which they were born. These findings suggest that there are two distinct types of fetal growth retardation.

Appetite↗