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Biomedical subjects

C Ring

Publications and source records attributed to C Ring.

68 records · Page 4Linked to original sources
PubMed1988

Visual push: a sensitive measure of dynamic balance in man.

Forty-six subjects aged 17 to 79 years who had not fallen in the previous year were exposed to an illusory visual stimulus while they stood on a force platform, with or without the introduction of a polyurethane foam pad under their feet to reduce proprioception. The amplitude of sway obtained in this way was not correlated to age, but the sway path in the anteroposterior plane increased logarithmically with increase in age. The method proved to be more sensitive than similar measures obtained without the illusory visual stimulus.

Adolescent↗
PubMed1988

Balance function in elderly people who have and who have not fallen.

Balance function was measured by a "visual push" method in three groups of subjects aged 65 and over. These groups were comprised of 27 "recent fallers" who had fractured their wrists, 15 subjects who had fallen at least once in the previous year although not recently ("remote fallers"), and 20 subjects who had not fallen in the previous year ("nonfallers"). Subjects who had fallen recently or remotely had significantly more sway on illusory visual stimulation than subjects who had not fallen. The "visual push" test of balance may be capable of distinguishing between elderly people who are and who are not at enhanced risk of falling.

Accidental Falls↗
PubMed1985

[The economic evaluation of vaccination against infectious cough in horses using the cost-benefit analysis].

Approximately 40% of all horses in the Federal Republic of Germany had infectious respiratory disease in 1982. Although an expert vaccine prophylaxis confers a reliable protection, conventional therapy is preferred over vaccination because of the cost. The cost/effect analysis carried out in this investigation demonstrates that vaccination should be favoured also for economic reasons. Based on the individual animal immune prophylaxis saves the horse owner at least 415 DM per year. This analysis did not take into account the danger of a transmission to man and related infection chains of viruses primarily responsible for respiratory disease in horses.

Animals↗
PubMedDate not supplied

Palpitations and cardiac awareness after heart transplantation.

OBJECTIVE: The aim of this study was to examine the awareness of resting heartbeat in heart transplantation recipients, compare it with that found in other medical populations, and determine whether clinical characteristics are associated with accurate heartbeat awareness. METHODS: Eligible patients underwent a research battery consisting of a heartbeat detection task and self-report questionnaires assessing cardiac symptoms, psychosocial variables, and cognitive function. The accurate awareness of resting heartbeat was determined by presenting the patients with auditory stimuli at each of six different delays following the R wave on the ECG. Patients then selected the tones that they thought coincided with the sensation they had of their heart beating. The patients' physicians rated their cardiac morbidity. The results were contrasted with comparable data obtained in previous work with other ambulatory medical populations. RESULTS: Forty-one consecutive heart transplantation recipients who survived for at least 3 months after surgery were eligible. Thirty-four (82.9%) of them were studied and complete data were obtained on 26 (63.4%). Nine patients (34.6%) were reliably able to detect their resting heartbeat. When compared with the 17 patients who were not accurately aware of their heartbeat, the two groups did not differ significantly in cardiac morbidity, cognitive brain dysfunction, generalized psychiatric distress, depression, somatization, or hypochondriacal attitudes. A significantly higher proportion of heart transplantation recipients were accurately aware of their heartbeat than was found in a sample of general medical outpatients and in asymptomatic, nonpatient volunteers. CONCLUSIONS: One-third of heart transplant recipients are accurately aware of resting heartbeat, despite the absence of cardiac innervation.

Adult↗
PubMedDate not supplied

Mortality and quality of life 12 months after myocardial infarction: effects of depression and anxiety.

OBJECTIVE: The purpose of this study was to determine the impact of symptoms of depression and anxiety on mortality and quality of life in patients hospitalized for acute myocardial infarction (MI). METHODS: The Beck Depression Inventory and the State-Trait Anxiety Inventory were completed by 288 patients hospitalized for MI. Twelve-month survival status was ascertained, and quality of life among survivors was assessed at 12 months using the Dartmouth COOP charts. RESULTS: Thirty-one (10.8%) patients died, 27 of cardiac causes, during the 12-month follow-up. Symptoms of depression and anxiety predicted neither cardiac nor all-cause mortality. Severity of infarction and evidence of heart failure predicted both cardiac and all-cause mortality. The same findings emerged from supplementary analyses of data from patients who died after discharge from the hospital. Symptoms of depression and anxiety, measured at entry, predicted 12-month quality of life among survivors, as did gender, partner status, employment status, living alone, previous frequency of exercise, and indices of disease severity (Killip class and Peel Index). In a multiple regression model in which all of these variables were entered, initial depression scores provided the best independent prediction of quality of life, although living alone, severity of infarction, and state anxiety also entered the model. CONCLUSIONS: Symptoms of depression and anxiety did not predict either cardiac or all-cause mortality after MI, but they did predict quality of life among those who lived to 12 months.

Adult↗
PubMedDate not supplied

Somatosensory evoked potentials in prolonged postcomatose unawareness state following traumatic brain injury.

Somatosensory evoked potentials (SEPs) were found by several authors to have a prognostic value in traumatically brain-injured (TBI) patients and can serve for monitoring changes in the state of TBI patients. Most of the studies were performed in the acute phase of trauma and most of reports have dealt with the short-latency components. The present study reports on seven patients (mean age 26.2 years) who suffered severe blunt TBI and were in prolonged post-comatose unawareness (PCU) state, in whom early and late SEP components were recorded at least 5 weeks after sustaining trauma. The SEPs studied could not reveal a uniform pattern apart from prolonged central conduction time (CCT), which was common to all patients. This may be due to individual non-homogeneous patterns of brain damage in our severe TBI patients. Meaningful late recovery of consciousness occurred in one patient and correlated with shortening of CCT. We suggest that the prolonged CCT found in our patients is related to diffuse subcortical axonal injury and that the shortened CCT found during the second examination in this patient actually reflects late partial recovery--either structural or functional--of affected brain regions. This patient is also an example of the possible relationship between reduction of CCT and recovery of consciousness a long time after injury.

Activities of Daily Living↗