[Psycho-neurogenic factors as a cause of life-threatening arrhythmias]

[Psychosomatic aspects of cardiac arrhythmias]

Emotional stress facilitates the occurrence of cardiac arrhythmias including sudden cardiac death. The prevalence of anxiety and depression is increased in cardiac patients as compared to the normal population. The risk of cardiovascular mortality is enhanced in patients suffering from depression. Comorbid anxiety disorders worsen the course of cardiac arrhythmias. Disturbance of neurocardiac regulation with predominance of the sympathetic tone is hypothesized to be causative for this. The emotional reaction to cardiac arrhythmias is differing to a large extent between individuals. Emotional stress may result from coping with treatment of cardiac arrhythmias. Emotional stress and cardiac arrhythmias may influence each other in the sense of a vicious circle. Somatoform cardiac arrhythmias are predominantly of psychogenic origin. Instrumental measures and frequent contacts between physicians and patients may facilitate disease chronification. The present review is dealing with the multifaceted relationships between cardiac arrhythmias and emotional stress. The underlying mechanisms and corresponding treatment modalities are discussed.

Anger and hostility predict the development of atrial fibrillation in men in the Framingham Offspring Study

BACKGROUND

Conflicting findings in the literature with regard to the ability of type A behavior, expressions of anger, or hostility to predict incident coronary heart disease (CHD) have created controversy. In addition, there are no prospective studies relating these characteristics to the development of atrial fibrillation (AF).

METHODS AND RESULTS

From 1984 to 1987, 3873 men and women, 18 to 77 years of age, participating in the Framingham Offspring Study, were examined and monitored for 10 years for the incidence of CHD, AF, and total mortality. Measures of type A behavior, anger, hostility, and risk factors for CHD and AF were collected at the baseline examination. After controlling for age, diabetes, hypertension, history of myocardial infarction, history of congestive heart failure, and valvular heart disease in Cox proportional hazards models, trait-anger (RR=1.1; 95% CI, 1.0 to 1.4; P=0.04), symptoms of anger (RR=1.2; 95% CI, 1.0 to 1.4; P=0.008), and hostility (RR=1.3; 95% CI, 1.1 to 1.5; P=0.003) were predictive of 10-year incidence of AF in men. After controlling for risk factors for CHD, none of the measures of anger, type A behavior, or hostility were related to incident CHD; however, trait-anger (RR=1.2; 95% CI, 1.1 to 1.4; P<0.01) was related to total mortality in men. None of the psychosocial variables were related to the 3 outcomes in women.

CONCLUSIONS

This is the first study to examine and demonstrate a predictive relation between measures of anger and hostility to the development of AF in men. As opposed to type A behavior, measures of anger and hostility may be more productive avenues for research in studying the risk of arrhythmias and total mortality in men.

Predictors of cardiac patients' psychophysiological responses to caregiving

Patients who are hospitalized for treatment of cardiac problems are at risk from life-threatening cardiovascular changes related to autonomic nervous system (ANS) arousal. Physical care during hospitalization can increase ANS arousal, yet caregiving is an essential feature of patient treatment. The purpose of this study was to identify the degree to which a patient's vulnerability to sensory stimuli, perceptions of previous caregiving and stressful events during hospitalization may contribute to ANS arousal during caregiving. Fifty-nine patients, who were hospitalized for treatment of coronary artery or valvular disease, received a standardized protocol designed to simulate aspects of physical caregiving. Heart rate, incidence of arrhythmias, blood pressure and state anxiety were measured during the protocol to determine ANS arousal. Regression analyses provided evidence that sensory vulnerability was the most consistent predictor across all indices of arousal during caregiving. Previous caregiving experiences that were perceived as 'negative' by the patient also contributed to higher blood pressure and anxiety. Stressful hospital events involving the family predicted higher blood pressure during caregiving.