کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7295465 1474409 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Two separable mechanisms are responsible for mental stress effects on high frequency heart rate variability: An intra-individual approach in a healthy and a diabetic sample
ترجمه فارسی عنوان
دو مکانیسم جداگانه مسئول اثرات استرس ذهنی بر تغییرات ضربان قلب با شدت بالا هستند: رویکرد درون فردی در یک نمونه سالم و یک دیابتی
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
چکیده انگلیسی
Central withdrawal of parasympathetic cardiac control and increased respiratory frequency represent two important determinants of reduced respiratory-related heart rate variability (HRV). However, studies are missing to disentangle their relative contribution during mental stress. Healthy subjects (n = 10) and type 2 diabetic patients (n = 8), the latter with evidence of cardiac autonomic neuropathy, participated in this study. Using an intra-individual approach, high-frequency (hf) HRV was assessed for spontaneous (during rest and mental stress) and paced breathing (0.15, 0.2, 0.25, 0.3, 0.35, 0.4 and 0.45 Hz; randomized sequence). Mental stress was induced by a challenging reaction time task. Effects of respiratory frequency on hf HRV were individually predicted by paced breathing data. Mental stress decreased hf HRV (p < .001), and increased respiratory frequency (p = .01). Individual prediction of hf HRV by stress respiratory frequency resulted in lower values (p = .02) than observed during rest, indicating that respiratory stress effects were sufficient to reduce hf HRV. However, observed hf HRV values during stress were even lower (p < .001). These results indicate that hf HRV reductions during stress can only partly be explained by concomitant respiratory frequency changes. This effect is detectable in healthy subjects and in patients with evidence of diabetic cardiac autonomic neuropathy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Psychophysiology - Volume 95, Issue 3, March 2015, Pages 299-303
نویسندگان
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