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Biomedical subjects

D W Evans

Publications and source records attributed to D W Evans.

At least 73 records · Page 4Linked to original sources
PubMed1982

Contrast sensitivity predicts pilots' performance in aircraft simulators.

Contrast sensitivity was found to be better than visual acuity for predicting a pilot's ability to detect a small, semi-isolated, air-to-ground target. Eleven instructor pilots had their acuity measured by both conventional and contrast sensitivity methods. Scotopic contract sensitivity showed the highest correlation with slant detection range (0.83). Conventionally determined visual acuity proved to be a poor predictor of a pilot's ability to detect a small low contrast target.

Adult↗
PubMed1980

Concanavalin A agglutinability of dextran gel spheres. A physical model for cells agglutination.

Dextran is a polysaccharide which can interact with concanavalin A, and insolubilized dextran spheres are available with different degrees of swelling in water. One grade of these dextran gel spheres can be agglutinated extensively by concanavalin A, while another grade with the same binding constant is not affected. Photomicrographs and measurement by capillary suction show that deformability and good contact between these gel spheres can be correlated with their agglutinability.

Agglutination↗
PubMed1980

Multicentre post-infarction trial of propranolol in 49 hospitals in the United Kingdom, Italy, and Yugoslavia.

A multicentre study of survivors of an anterior myocardial infarction is reported. The trial consisted of 720 patients and was a double-blind, placebo-controlled study with propranolol 40 mg three times a day. Trial entry was at two to 14 days (mean 8.5 days) and follow-up at one, three, and in most centres, six and nine months. The trial was designed to detect a 50 per cent reduction in mortality and this was not shown. The non-fatal reinfarction rate was similar in both groups. Subgroup analysis identified several prognostic risk factors for death, none of which interacted with treatment.

Clinical Trials as Topic↗
PubMed1980

Preparing faculty for the allied health professions: a follow-up study of a program's graduates.

Since 1972, Baylor College of Medicine, the University of Houston and Texas A&M University have jointly offered a graduate Program in Allied Health Teacher Education and Administration. The purpose of the program is to prepare faculty and administrative leaders for allied health education programs. As of December 1978, a total of 94 allied health professionals had completed master's or doctoral degrees and most of them are currently pursuing academic careers. This article describes the results of a follow-up study of these graduates to determine their current activities, locations and job satisfaction and to make decisions regarding the success of the program in raching its goals.

Education, Graduate↗
PubMed1979

Child abuse prevention--implementation within the curriculum.

The number of reported cases of child abuse and neglect is increasing. Most educators are aware of the problem; however, awareness alone has minimal impact on prevention. Specific planning is needed, and this article explores various avenues for including child abuse education as a part of the regular school curriculum. The ultimate goal is to develop educational strategies as one means of preventing abuse when school children grow to adulthood and become parents.

Adult↗
PubMed1979

Age, sex, and ischaemic heart disease as prognostic indicators in long-term cardiac pacing.

The influence of age, sex, and overt ischaemic heart disease on survival after pacing was studied in a population of 427 patients. The median survival for the whole group was 7.75 years. Women between 55 and 74 years and men between 65 and 74 years enjoyed median survivals in excess of 10 years. Patients over 74 years and men with ischaemic heart disease had median survivals of the order of 5 years and 3 1/2 years, respectively. The findings may help to match generator lifetimes to patient-survival prospects.

Adolescent↗
PubMed1979

Coexistence of asymmetric septal hypertrophy and aortic valve disease in adults.

Echocardiography detected asymmetric septal hypertrophy (ASH) in five of 200 adults being assessed for aortic valve surgery. Four of these were among 119 patients with dominant aortic stenosis, which was severe in three. ASH was confirmed at the time of aortic valve replacement in two of these patients; the third declined operation. The finding of ASH in only one of 81 patients with free aortic reflux is consistent with chance association. While the same explanation could apply to the higher prevalence in those with aortic stenosis, it may be that a long-standing pressure overload can trigger inappropriate septal hypertrophy in predisposed individuals.

Adolescent↗
PubMed1979

Persistent lone atrial fibrillation--its prognosis after clinical diagnosis.

Eighty-three patients whose atrial fibrillation appeared to be permanent and the sole cardiac abnormality at the time of diagnosis were followed for one to 19 years (mean 7.5 years). None suffered systemic embolism. Three died, none of cardiac disease. Sinus rhythm returned in seven. Another six developed features suggestive of other heart disease. In the remaining 67, the initial diagnosis of persistent lone atrial fibrillation remained tenable and they remained well.The medium-term prognosis for patients with this disorder seems good.

Aged↗
PubMed1977

Hyperventilation: An important cause of pseudoangina.

50 patients initially referred to a cardiac clinic for confirmation or exclusion of angina were found to be habitual hyperventilators. 13 of them also had some organic heart disease. Simple physiotherapy aimed at restoring a normal breathing pattern proved an effective treatment, 76% of those followed for 11-68 months being symptom-free.

Adult↗