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  • S Rietveld
  • 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)
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)
BACKGROUND Children with asthma are vulnerable to negative emotions, but clinical observations and research suggest that negative emotions can also be precipitants of asthma attacks. Empirical data provided mixed results. The hypothesis was tested that negative emotions influence subjective rather than objective symptoms of asthma, breathlessness and(More)
BACKGROUND A majority of patients with asthma believe that psychological factors (particularly stress) can induce asthma attacks, but empirical support for actual stress-induced airways obstruction is controversial. This study tested the hypothesis that stress induces breathlessness and not airways obstruction. METHODS Stress was induced by a frustrating(More)
Breathlessness and negative emotions during asthma attacks interact in complex patterns. This study tested the influence of emotional imagery on breathlessness during voluntary breath holding. Adolescents with and without asthma (n = 36 + 36) were assigned to positive imagery, negative imagery, or no imagery. There were four trials with close to thresholds(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)
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)
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)
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)