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For continuous monitoring of the respiratory condition of patients, e.g., at the intensive care unit, computer assistance is required. Existing mechanical devices, such as the peak expiratory flow meter, provide only with incidental measurements. Moreover, such methods require cooperation of the patient, which at, e.g., the ICU is usually not possible. The(More)
This study tested various sources of changes in respiratory sinus arrhythmia (RSA). Twenty-two healthy participants participated in three experimental conditions (mental stress, relaxation, and mild physical exercise) that each consisted of three breathing parts (normal breathing, breathing compressed room air, and breathing compressed 5% CO2-enriched air).(More)
  • S Rietveld
  • The Journal of asthma : official journal of the…
  • 1998
Clinical observations and research show that symptom perception in asthma is, at worst, inaccurate or often biased in two directions: (1) blunted perception, (2) overperception (both involving airway obstruction manifested in low or high breathlessness). Theoretically breathlessness occurs during respiratory labor or blood gas changes. However,(More)
BACKGROUND Many patients with congenital heart disease have persistent cardiac defects, psychosocial adjustment problems, and a poor quality of life. This study tested the relationship between negative thoughts and adaptation to congenital heart disease. METHODS Eighty-two adult out-Patients with congenital heart disease were divided on the basis of few,(More)
Symptom perception in patients with asthma is often inadequate. Patients may fail to perceive serious airway obstruction or suffer from breathlessness without objective cause. These extremes are associated with fatal asthma and excessive use of medicines, respectively. This article covers symptom perception in a multidisciplinary perspective. A presentation(More)
BACKGROUND Previous studies have shown that patients with congenital heart disease (ConHD) report a diminished health-related quality of life. PURPOSE This study examines the mechanisms by which ConHD affects health-related quality of life. We hypothesize that (1) the relation between trait anxiety and quality of life is mediated by a negative(More)
The discordance between the objective and subjective symptoms of asthma has major effects on proper medication and management. In 2 studies the influence of respiratory sounds in the process of symptom perception underlying breathlessness was investigated in children aged 7-17 years. In Experiment 1, asthmatic wheezing sounds were recorded in 16 children(More)
BACKGROUND Little is known about the mechanisms explaining an increased perception of heart symptoms in congenital heart disease (ConHD). In the present study, it was suggested that a combination of high trait anxiety and disease history increases the perception of heart symptoms. PURPOSE It was tested whether false heart cues will result in an increased(More)
Emotional factors are an obstacle in the diagnosis and management of asthma. This review discusses three problem patterns: negative emotions in relatively normal patients with asthma; patients presenting possible functional symptoms and; patients presenting asthma in conjunction with psychiatric deviations. Negative emotions influence the symptoms and(More)