Brittany Nackley , Gaetano Valenza , Riccardo Barbieri , Bruce H. Friedman
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The mean SAI-PEP correlation increased significantly from baseline to stimulus (<em>r</em><sub><em>B->S</em></sub><em>(16) = .22, p = 0.042)</em>, and then dropped from stimulus to recovery, back to near baseline levels <em>(r</em><sub><em>S->R</em></sub><em>(16) = -.21, p = 0.047)</em>. Ideographic patterns emerged, although overall average PEP-SAI correlations were lower than expected, as the procedure did not include a physical stressor. Participants with the strongest positive SAI-PEP correlations (mean <em>r(1565) = .579, p < 0.001</em>) had a matching pattern of psychological distress, as measured by Subjective Units of Distress Scale time series. When psychological distress patterns diverged from both SNS indices, SAI and PEP also diverged from each other. Results suggest that cardiac rate (SAI) and contractility (PEP) may reflect similar temporal dynamics when psychological and physiological stress patterns are aligned. PEP’s lability in time series was over 10 times higher than that for SAI. While theoretical and methodological advantages are associated with SAI, further research is needed to comprehensively assess it as a cardiac sympathetic index.</div></div>","PeriodicalId":55372,"journal":{"name":"Biological Psychology","volume":"197 ","pages":"Article 109021"},"PeriodicalIF":2.7000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Comparing a cardiac sympathetic activity index with pre-ejection period in time series\",\"authors\":\"Brittany Nackley , Gaetano Valenza , Riccardo Barbieri , Bruce H. Friedman\",\"doi\":\"10.1016/j.biopsycho.2025.109021\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Over the last decade, cardiology research has yielded a Sympathetic Activity Index (SAI) that captures the non-linear response patterns of the sympathetic nervous system. 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引用次数: 0
摘要
在过去的十年里,心脏病学研究已经产生了一个交感神经活动指数(SAI),它捕捉了交感神经系统的非线性反应模式。我们研究了这种变时指数和前射血期(PEP),一种肌力指数。虽然SAI已在生理学、心脏病学和生物医学工程研究中得到验证,但本研究将SAI引入生物心理学。SAI仅由ECG计算,而PEP需要ECG和阻抗心动图(ICG)作为输入。17名参与者(13名女性)的每个参与者的每个交感神经指数(SAI, PEP)平均分析1468个时间序列观察结果。平均SAI-PEP相关性从基线到刺激显著增加(rB->S(16) =。22, p = 0.042),然后从刺激回落到复苏,回到接近基线水平(rS->R(16) = -)。21, p = 0.047)。尽管总体平均PEP-SAI相关性低于预期,但表意模式出现了,因为该过程不包括物理压力源。SAI-PEP正相关最强的参与者(平均r(1565)=。579页
Comparing a cardiac sympathetic activity index with pre-ejection period in time series
Over the last decade, cardiology research has yielded a Sympathetic Activity Index (SAI) that captures the non-linear response patterns of the sympathetic nervous system. We investigated this chronotropic index alongside pre-ejection period (PEP), an inotropic index. While SAI has been validated in physiology, cardiology, and biomedical engineering research, this study introduces SAI to biopsychology. SAI is calculated exclusively from ECG, while PEP requires both ECG and impedance cardiography (ICG) as inputs. An average of 1468 time series observations were analysed per participant per sympathetic index (SAI, PEP) across 17 participants (13 female). The mean SAI-PEP correlation increased significantly from baseline to stimulus (rB->S(16) = .22, p = 0.042), and then dropped from stimulus to recovery, back to near baseline levels (rS->R(16) = -.21, p = 0.047). Ideographic patterns emerged, although overall average PEP-SAI correlations were lower than expected, as the procedure did not include a physical stressor. Participants with the strongest positive SAI-PEP correlations (mean r(1565) = .579, p < 0.001) had a matching pattern of psychological distress, as measured by Subjective Units of Distress Scale time series. When psychological distress patterns diverged from both SNS indices, SAI and PEP also diverged from each other. Results suggest that cardiac rate (SAI) and contractility (PEP) may reflect similar temporal dynamics when psychological and physiological stress patterns are aligned. PEP’s lability in time series was over 10 times higher than that for SAI. While theoretical and methodological advantages are associated with SAI, further research is needed to comprehensively assess it as a cardiac sympathetic index.
期刊介绍:
Biological Psychology publishes original scientific papers on the biological aspects of psychological states and processes. Biological aspects include electrophysiology and biochemical assessments during psychological experiments as well as biologically induced changes in psychological function. Psychological investigations based on biological theories are also of interest. All aspects of psychological functioning, including psychopathology, are germane.
The Journal concentrates on work with human subjects, but may consider work with animal subjects if conceptually related to issues in human biological psychology.