| Summary: | 碩士 === 國立中正大學 === 臨床心理學研究所 === 104 === Objective: The purpose of this study is to examine the relationships between peripheral vascular responses with type D personality traits and heart rate variability (HRV) during the anger-induced task. Methods: The database collected by the projects supported by the grants from Ministry of Science and Technology (NSC 102-2410-H-194-022) to Chia-Ying Weng. Seventy-two adults with elevated blood pressure were recruited (age: 55.37 ± 8.69, male: 45.80%). The excluded criteria were coronary artery disease, stroke, neurologic diseases, liver diseases, kidney diseases and mental disorders. Type D personality was assessed by Type D Scale-14-Taiwanese version which includes two subscales, negative affectivity (NA) and social inhibition (SI). Blood volume amplitude (BVA) and HRV indices were collected during the following five stages of the anger recall task: adaptation, baseline, anger recall, anger description, and recovery. The participants were then divided into the following two groups by anger description reactivity in BVA (%): (1) typical vasoconstriction group (n = 48, age: 54.15 ± 12.24, male: 43.75%) with BVA (%) less than zero; (2) atypical vasodilation group (n = 24, age: 55.45 ± 7.45, male: 50.00%) with BVA (%) greater than zero. There were no significant differences in age and gender between the two groups (t = -0.46, p = .646; χ2 = 0.08, p = .773). Results: 67% of the participants demonstrated a typical vasoconstriction reaction during the anger description stage. The remaining 33% of the participants showed peripheral blood vessel constriction than the typical vasoconstriction group during the baseline resting stage, and demonstrated an atypical vasodilation reaction during the anger description stage. During baseline and anger recall task, the BVA of atypical vasodilation group were significantly lower than that of the typical vasoconstriction group (F = 11.34, p < .001, ηp2 = .048; F = 4.95, p = .027, ηp2 = .022). In normal non-type D personality, the total HRV reactivity indexed by SDNN(F = 7.29, p = .009, ηp2 = .098 ) and parasympathetic activity indexed by HF(F = 5.42, p = .023, ηp2 = .075) of vasodilation group were significantly lower than that of the typical vasoconstriction group. In atypical vasodilation group, the total HRV reactivity indexed by SDNN(F = 5.43, p = .023, ηp2 = .075) and parasympathetic activity indexed by HF(F = 6.21, p = .015, ηp2 = .085) of type D personality were significantly greater than that of the non-type D personality. Conclusion: (1)The BVA of atypical vasodilation group was lower than typical vasoconstriction group during the baseline resting stage. But, there were no significant differences of autonomic nervous system between two groups. (2)Both of typical vasoconstriction group and atypical vasodilation group demonstrated a parasympathetic nervous withdrawal, enhanced total heart rate variability and sympathetic-parasympathetic balance. Also, there were no relationship in the different blood vessel reactivity and autonomic nervous system activity. (3)In typical vasoconstriction group with/without Type D personality, the autonomic nervous system activity were no significant differences. The parasympathetic nervous activity, total heart rate variability in atypical vasodilation group with Type D personality were higher than atypical vasodilation group without Type D personality. The results of this study demonstrated that atypical vasodilation group with Type D personality may evoke more autonomic nervous system activity to dilating. Atypical vasodilation group without Type D personality may not evoke autonomic nervous system activity to dilating. However, autonomic nervous system activity in atypical vasodilation group without Type D personality were lower than else group, the mechanism was unclear.
|
|---|
