Relevant bibliographies by topics / Heart rate asymmetry

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Heart rate asymmetry'

Author: Grafiati
Published: 4 June 2025
Last updated: 23 June 2025

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Journal articles on the topic "Heart rate asymmetry"

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Guzik, Przemysław, and Jarosław Piskorski. "Asymmetric properties of heart rate microstructure." Journal of Medical Science 89, no. 2 (2020): e436. http://dx.doi.org/10.20883/medical.e436.

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The duration of each cardiac cycle is measured on ECG as the distance between the peaks of consecutive R waves (RR interval). Its inverse value corresponds to the heart rate (HR) changing in a beat-to-beat manner. HR accelerations are reflected as the shortenings of RR intervals while HR decelerations as the lengthening of RR intervals. HR asymmetry is a physiological phenomenon caused by an unequal input of HR decelerations and accelerations to the HR variability. Naturally occurring consecutive values of RR intervals create time series which are composed of acceleration and deceleration runs of different length. Some examples are a single HR acceleration, a pair of HR decelerations, a run consisting of five consecutive HR decelerations or a run composed of eight accelerations in a row. These runs make up the so-called heart rate microstructure that has asymmetric properties due to unequal contribution of acceleration and deceleration runs. Asymmetry of HR microstructure is a physiological finding in healthy people. However, the asymmetric properties of HR microstructure have been shown to significantly alter in some clinical conditions such as myocardial infarction, obstructive sleep apnea, chronic obturatory pulmonary disease or sepsis in infants. An abnormal HR microstructure has predictive value in survivors of myocardial infarction or patients with clinical indications for exercise treadmill stress test, e.g., for total mortality. In this review, we present and explain how the asymmetric properties of HR microstructure can be quantified, and summarise available data on the clinical and predictive value of this phenomenon and its analysis.
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Zalas, Dominika, Waldemar Bobkowski, Jarosław Piskorski, and Przemysław Guzik. "Heart Rate Asymmetry in Healthy Children." Journal of Clinical Medicine 12, no. 3 (2023): 1194. http://dx.doi.org/10.3390/jcm12031194.

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Heart rate asymmetry (HRA) is a physiological phenomenon characterized by an unequal contribution of heart rate decelerations and accelerations to different heart rate variability (HRV) features. While HRA has been demonstrated in adults’ ECGs of different duration, a similar investigation in healthy children has not been conducted. This study investigated the variance- and number-based HRA features in 96 healthy children (50 girls and 46 boys, aged 3–18 years) using 24-h ECGs. Additionally, we studied sex differences in HRA. To quantify HRA, variance-based and relative contributions of heart rate decelerations to short-term (C1d), long-term (C2d), and total (CTd) HRV, and the number of all heartbeats (Nd) were computed. Heart rate decelerations contributed more to C1d, but less to C2d and CTd, and were less frequent than heart rate accelerations. Short-term HRA was better expressed in boys. The majority of children (93.7%) had short-term HRA, 88.5% had long-term HRA, 88.5% had total HRA, and 99.0% had more accelerations than decelerations. No sex differences were observed for the rate of various HRA features. Heart rate asymmetry is a common phenomenon in healthy children, as observed in 24-h ECGs. Our findings can be used as reference data for future clinical studies on HRA in children.
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Piskorski, Jaroslaw, and Przemyslaw Guzik. "Compensatory properties of heart rate asymmetry." Journal of Electrocardiology 45, no. 3 (2012): 220–24. http://dx.doi.org/10.1016/j.jelectrocard.2012.02.001.

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Sibrecht, Greta, Jarosław Piskorski, Tomasz Krauze, and Przemysław Guzik. "Asymmetric Properties of the Heart Rate Microstructure in Healthy Adults during 48 h ECG Recordings." Journal of Clinical Medicine 12, no. 23 (2023): 7472. http://dx.doi.org/10.3390/jcm12237472.

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Heart rate asymmetry reflects the different contributions of heart rate (HR) decelerations and accelerations to heart rate variability (HRV). We examined the contribution of monotonic runs of HR accelerations and decelerations to the asymmetric properties of the HR microstructure in the 48 h electrocardiograms (ECGs) of healthy adults (n = 101, 47 males, average age of 39 years) and analysed sex differences in the HR microstructure. The HR microstructure was asymmetric for runs of most lengths, except for sequences of two consecutive decelerations (DR2s) or accelerations (AR2s). Women had a higher prevalence of AR2s than men but fewer runs in the range of 4 to 11 consecutive accelerations (AR4–AR11s) and 5 to 11 consecutive decelerations (DR5–DR11s). The longest runs consisted of 47 consecutive accelerations (AR47s) and 27 consecutive decelerations (DR27s). More DR3s than AR3s and more DR4s than AR4s reveal a crossing of HR microstructure asymmetry. In conclusion, more acceleration than deceleration runs demonstrate that the HR microstructure was asymmetric in the 48 h ECGs. This phenomenon was present in both sexes but was more pronounced in men. For shorter runs of 3 and 4 consecutive heartbeats, there was a crossing of HR microstructure asymmetry, with more deceleration than acceleration runs.
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Karmakar, C. K., AH Khandoker, and M. Palaniswami. "Phase asymmetry of heart rate variability signal." Physiological Measurement 36, no. 2 (2015): 303–14. http://dx.doi.org/10.1088/0967-3334/36/2/303.

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Kaczmarek, Lukasz D., Maciej Behnke, Jolanta Enko, et al. "Effects of emotions on heart rate asymmetry." Psychophysiology 56, no. 4 (2019): e13318. http://dx.doi.org/10.1111/psyp.13318.

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Petelczyc, Monika, Jan Zebrowski, and Rafal Baranowski. "Heart rate variability asymmetry in stochastic analysis." Journal of Critical Care 27, no. 3 (2012): e5-e6. http://dx.doi.org/10.1016/j.jcrc.2012.01.022.

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Hejjel, László. "Heart rate variability and heart rate asymmetry analysis: does the inspiration/expiration ratio matter?" Journal of Applied Physiology 116, no. 6 (2014): 709. http://dx.doi.org/10.1152/japplphysiol.00013.2014.

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López-Justo, Carolina, Adriana Cristina Pliego-Carrillo, Claudia Ivette Ledesma-Ramírez, et al. "Differences in the Asymmetry of Beat-to-Beat Fetal Heart Rate Accelerations and Decelerations at Preterm and Term Active Labor." Sensors 21, no. 24 (2021): 8249. http://dx.doi.org/10.3390/s21248249.

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The fetal autonomic nervous system responds to uterine contractions during active labor as identified by changes in the accelerations and decelerations of fetal heart rate (FHR). Thus, this exploratory study aimed to characterize the asymmetry differences of beat-to-beat FHR accelerations and decelerations in preterm and term fetuses during active labor. In an observational study, we analyzed 10 min of fetal R-R series collected from women during active preterm labor (32–36 weeks of pregnancy, n = 17) and active term labor (38–40 weeks of pregnancy, n = 27). These data were used to calculate the Deceleration Reserve (DR), which is a novel parameter that quantifies the asymmetry of the average acceleration and deceleration capacity of the heart. In addition, relevant multiscale asymmetric indices of FHR were also computed. Lower values of DR, calculated with the input parameters of T = 50 and s = 10, were associated with labor occurring at the preterm condition (p = 0.0131). Multiscale asymmetry indices also confirmed significant (p < 0.05) differences in the asymmetry of FHR. Fetuses during moderate premature labor may experience more decaying R-R trends and a lower magnitude of decelerations compared to term fetuses. These differences of FHR dynamics might be related to the immaturity of the fetal cardiac autonomic nervous system as identified by this system response to the intense uterine activity at active labor.
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Guzik, Przemyslaw, Jaroslaw Piskorski, Tomasz Krauze, Andrzej Wykretowicz, and Henryk Wysocki. "Heart rate asymmetry by Poincaré plots of RR intervals." Biomedizinische Technik/Biomedical Engineering 51, no. 4 (2006): 272–75. http://dx.doi.org/10.1515/bmt.2006.054.

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Dissertations / Theses on the topic "Heart rate asymmetry"

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Meerwijk, Esther Lydia. "Heart Rate Variability and Frontal EEG Asymmetry as Markers of Psychological Pain." Thesis, University of California, San Francisco, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3587886.

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<p> <b>Introduction:</b> Psychological pain is a frequently observed symptom in depression, and escape from unbearable psychological pain is often mentioned as the reason for suicide. We explored the relationship between psychological pain and two potential biomarkers: heart rate variability (HRV) and frontal EEG &alpha;-asymmetry. As both markers have successfully been used as feedback to alter mood state, knowledge about the relationship between HRV, frontal EEG, and psychological pain may be of particular interest for interventions to alleviate psychological pain. </p><p> <b>Methods:</b> Adults with a history of depression (<i>N </i> = 35) participated in six 5-minute sessions during which heart rate and EEG were recorded, while the participants sat upright with their eyes closed. In addition, participants completed the Beck scales for depression, hopelessness, and suicide ideation, and two measures of psychological pain: the Psychache Scale and the Orbach &amp; Mikulincer Mental Pain (OMMP) Questionnaire. </p><p> <b>Results:</b> Mean age of the participants was 35.0 (<i> SD</i> 11.84) and their average level of depression and hopelessness was moderate. The intraclass correlation coefficient indicated excellent agreement of neurophysiological variables across successive measurements. In separate hierarchical regression models, after controlling for depression and hopelessness, low-frequency HRV and right midfrontal delta power contributed significant variance (&Delta; <i>R </i><sup>2</sup> = 8.8%, &beta; = -.30, <i> p</i> = .02 and &Delta;<i>R</i><sup>2</sup> = 7.0%, &beta; = -.26, <i>p</i> = .03, respectively) to the prediction of current psychological pain on the OMMP. For worst-ever psychological pain on the OMMP, midfrontal delta power contributed significant variance (&Delta;<i>R </i><sup>2</sup> = 20.5%, &beta; = -.45, <i>p</i> = .004), after controlling for depression. Suicidal desire moderated the relationships of low-frequency HRV and midfrontal delta power to psychological pain on the Psychache Scale. High-frequency HRV and frontal &alpha;-asymmetry did not correlate with the Psychache Scale or OMMP scores. EEG asymmetry based on fractal dimensions decreased (greater left than right complexity) with increasing current and worst-ever psychological pain on the OMMP. </p><p> <b>Conclusion:</b> Findings suggest that greater psychological pain is associated with increased sympathetic nervous system activity, rather than with reduced parasympathetic nervous system activity. Psychological pain may affect the right frontal cortex more adversely than the left frontal cortex. </p>
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Demaree, Heath Allan. "Analysis of Quantitative Electroencephalographic and Cardiovascular Responses to Stress Amoung Low- and High-Hostiles." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30334.

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This experiment was primarily designed to identify higher cortical correlates of cardiovascular arousal. Low- and high-hostile, right-handed, undergraduate men were identified using the Cook Medley Hostility Scale (CMHS). All participants (N = 30) completed the cold pressor paradigm. Cardiovascular (heart rate, systolic blood pressure, and diastolic blood pressure) and electroencephalographic (beta magnitude) data were collected before and after the stressor. As predicted, high-hostiles showed greater increases of heart rate and systolic blood pressure to the stressor relative to low-hostiles. The primary findings of this research include significantly greater beta magnitude recorded by the T3, relative to F7, electrode among low-hostiles. This may suggest that low-hostiles experience left-frontal disinhibition of left-temporal regions, thereby strengthening cardiovascular regulation during the cold-pressor stress. In addition, irrespective of condition, high-hostiles evidenced significantly greater beta magnitude at regions corresponding to the F7 and F8 electrodes. This perhaps suggests that high-hostiles have a relative inability to increase their rostral modulation of posterior systems related to cardiovascular activity/regulation. Low- and high-hostiles did not, however, evidence reliable differences in their ability to monitor cardiovascular arousal to the cold-pressor stress. Findings are discussed in terms of a systems approach, and pertinent future research is recommended. This research did not support the prominent neuropsychological theories of cardiovascular regulation proposed by Heilman et al. (1993) and Tucker and Williamson (1984). Rather, the results may suggest that right- and left-cerebral mechanisms may be primarily responsible for sympathetic and parasympathetic cardiovascular arousal, respectively.<br>Ph. D.
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(9167717), Kaylin E. Hill. "Identifying the pathophysiology of depression and its permeability across the lifespan." Thesis, 2020.

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<div> <div> <div> <p>Major depressive disorder (MDD) and risk for its development are characterized by reduced reactivity and flexibility to environmental demands. Frontal alpha asymmetry (FAA), heart rate variability (HRV), and salivary cortisol reactivity are each well-established indicators of regulation across neural, autonomic, and hypothalamic-pituitary-adrenal (HPA) physiological systems, respectively. Growing literature suggests that each of these processes is dysregulated in individuals with a history of MDD. However, patterns of dysregulation across these physiological systems and relative MDD risk are unknown. Moreover, these physiological regulatory patterns may extent beyond markers of MDD risk in adulthood to also capture the transmission of risk for MDD from parent to offspring. The following series of five studies investigated the pathophysiology of MDD and the permeability of risk across the lifespan. First, the pattern of dysregulation across physiological indices—representing neural, autonomic, and HPA functioning—in adults was examined with regard to depressive symptoms. Second, the associations amongst infant FAA, HRV, and cortisol reactivity and maternal depressive symptoms were assessed as potential early markers of depression risk. Third, mother-infant associations across physiological indices were investigated to assess direct intergenerational transmission of depression risk. Studies 4 and 5 further investigated pathophysiological functioning in mothers and infants within the context of comorbid anxiety and current depressive symptomatology versus lifetime MDD illness. Mothers and their 12-month-old infants (n = 35 dyads) completed resting- state and stressor tasks to assess regulatory patterns across neural, autonomic, and HPA systems, associations with MDD, and intergenerational transmission. In adults, results suggest that lifetime history of MDD is significantly associated with blunted cortisol reactivity; FAA and high- frequency HRV also demonstrated the same direction of associations. In infants, results demonstrated that maternal depressive symptoms, particularly current symptoms, relate to blunted physiological regulation in infants specifically for FAA and HRV indices. For mothers and infants, there was support for the direct intergenerational transmission of FAA and HRV indices. These intergenerational associations did not fully account for intergenerational risk of depression, as maternal physiological regulation and maternal depression were found to each significantly predict infant regulation as simultaneous predictors. Accounting for comorbid anxiety and examining current symptoms versus lifetime illness were essential to investigating associations amongst physiological functioning and depression. These patterns in conjunction with the literature suggest a developmental model to MDD pathophysiology that encompasses multiple theoretical frameworks. Future research is necessary to clarify regulatory patterns across physiological systems within individuals and across time with regard to MDD risk, onset, and course.</p></div></div></div>
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Books on the topic "Heart rate asymmetry"

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Karatasakis, G., and G. D. Athanassopoulos. Cardiomyopathies. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199599639.003.0019.

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Echocardiography is a key diagnostic method in the management of patients with cardiomyopathies.The main echocardiographic findings of hypertrophic cardiomyopathy are asymmetric hypertrophy of the septum, increased echogenicity of the myocardium, systolic anterior motion, turbulent left ventricular (LV) outflow tract blood flow, intracavitary gradient of dynamic nature, mid-systolic closure of the aortic valve and mitral regurgitation. The degree of hypertrophy and the magnitude of the obstruction have prognostic meaning. Echocardiography plays a fundamental role not only in diagnostic process, but also in management of patients, prognostic stratification, and evaluation of therapeutic intervention effects.In idiopathic dilated cardiomyopathy, echocardiography reveals dilation and impaired contraction of the LV or both ventricles. The biplane Simpson’s method incorporates much of the shape of the LV in calculation of volume; currently, three-dimensional echocardiography accurately evaluates LV volumes. Deformation parameters might be used for detection of early ventricular involvement. Stress echocardiography using dobutamine or dipyridamole may contribute to risk stratification, evaluating contractile reserve and left anterior descending flow reserve. LV dyssynchrony assessment is challenging and in patients with biventricular pacing already applied, optimization of atrio-interventricular delays should be done. Specific characteristics of right ventricular dysplasia and isolated LV non-compaction can be recognized, resulting in an increasing frequency of their prevalence. Rare forms of cardiomyopathy related with neuromuscular disorders can be studied at an earlier stage of ventricular involvement.Restrictive and infiltrative cardiomyopathies are characterized by an increase in ventricular stiffness with ensuing diastolic dysfunction and heart failure. A variety of entities may produce this pathological disturbance with amyloidosis being the most prevalent. Storage diseases (Fabry, Gaucher, Hurler) are currently treatable and early detection of ventricular involvement is of paramount importance for successful treatment. Traditional differentiation between constrictive pericarditis (surgically manageable) and the rare cases of restrictive cardiomyopathy should be properly performed.
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Book chapters on the topic "Heart rate asymmetry"

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Khandoker, Ahsan Habib, Chandan Karmakar, Michael Brennan, Andreas Voss, and Marimuthu Palaniswami. "Heart Rate Asymmetry Analysis Using Poincaré Plot." In Poincaré Plot Methods for Heart Rate Variability Analysis. Springer US, 2013. http://dx.doi.org/10.1007/978-1-4614-7375-6_5.

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Lai, Yi-Horng, Jiahan Yu, Kun Su, et al. "The Continuous Time Dynamical Analysis of Heart Rate Asymmetry." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2022. http://dx.doi.org/10.3233/faia220552.

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Heart rate asymmetry (HRA) can investigate the asymmetric characteristics that cannot be analyzed by traditional heart rate variability (HRV). The asymmetric pattern of heart rate acceleration and deceleration can be described by the projection of RR interval (RRI) series on the Poincaré plot. In this study, two new asymmetric variables of HRA are proposed. By using the moving window method, the dynamical analysis of HRA can be illustrated on the time series diagram. Two kinds of physiological experiments and an artificial chaotic RRI system are evaluated. The binomial experimental results (p-value: 0.004) verify that the proposed method can quickly and effectively respond to the HRA.
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Yan, Chang, Peng Li, Yang Li, Jianqing Li, and Chengyu Liu. "Analysis of Heart Rate Asymmetry During Sleep Stages." In Proceedings of CECNet 2021. IOS Press, 2021. http://dx.doi.org/10.3233/faia210467.

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It is one of the hot spots in recent years to explore changes in the sleep stage by assessing autonomic nervous activity. In recent years, heart rate asymmetry (HRA) is often used to measure the activity of autonomic nerves. However, the relationship between HRA and sleep stage is not clear. We performed Porta’s index (PI), Guzik’s index (GI), slope index (SI) and area index (AI) analyses on RR intervals per 30-s for understanding the HRA during sleep. Two measurement protocols were set: 1) the HRA values were calculated; 2) the degrees of heart rate deviation from symmetry were estimated. Results showed that PI significantly decreased from N1 and N2 to N3 (p&lt;0.01), and it is increased the highest in REM than other stages (p&lt;0.05). The asymmetry of HRA were significantly lower in N3 (PI and AI p’s&lt;0.05; GI and SI p’s&lt;0.01), and it increased in REM (PI p&lt;0.05; GI, SI and AI p’s&lt;0.0001). The results suggested that HRA has the potential to be used in sleep stage monitoring.
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Petrachkov, Oleksandr, and Olena Yarmak. "MORPHOFUNCTIONAL SCREENING OF 17-19 YEARS OLD YOUNG MEN IN THE PROCESS OF PHYSICAL EDUCATION." In Priority areas for development of scientific research: domestic and foreign experience. Publishing House “Baltija Publishing”, 2021. http://dx.doi.org/10.30525/978-9934-26-049-0-39.

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The scientific work presents a detailed analysis of the 17-19 years young men morphofunctional status screening studies. The young men who took part in the research did not have any pathologies in their health and belonged to the main medical group. To effectively address the goal of the study, a wide range of methods typical of researches in the field of physical culture and sports was used. A total of 34 indicators were studied, including 23 direct measurements. The reliability of the obtained results is confirmed by adequate theoretical substantiation of scientific positions and research apparatus, highly informative and reliable research methods, optimal duration, correctness of processing, analysis and interpretation of the obtained data. The relevance of the chosen topic is confirmed by the results of the study, which were based on knowledge of age anatomy, age physiology, hygiene of physical culture and sports. Analysis of the young men morphological condition individual results in pre-conscription age indicates incomplete formation of the musculoskeletal system, and the circumferential size of the waist and hips, which exceeded physiological norms indicate the presence of excess body weight. There is a significant asymmetry between the results of wrist dynamometry, the difference between the strength of the right hand and the left hand is 6.2 kg. Studies of the body composition revealed that the average group performance of muscle and bone components of the young men aged 17-19 years is below the physiological norm. The range of muscle component values ranges from a minimum of 36.2% to a maximum of 78.7%, indicating sample heterogeneity. Studies of cardiovascular parameters revealed: heart rate at rest, which exceeded the physiological norm in 26.3% of test subjects, signs of bradycardia in 7.6% of test subjects, signs of hypotension were found in 4.7% of test subjects, signs of hypertension were found in 18.4% of test subjects. We found 7.6% of young men with the pulse pressure exceeded the permissible threshold. The vast majority, which is 70.7% of the studied young men of pre-conscription age, had individual results of endurance coefficient in the range of 17-29 s.u., which indicates a weakened activity of the cardiovascular system. Low individual indicators of lung vital capacity are observed at 8.3% of young men, and are in the range of 2.6-2.9 l. 10.1% of young men with individual respiratory rate results significantly higher than the age norm were also found. In the course of the study, we found that only 19.1% of pre-conscription youth had individual results of the hypoxia index which corresponded to the age norm. The individual results of the Rufier test in pre-conscription young men were distributed as follows: 7.9% have above average level of physical working capacity, 37.2% have average level of physical working capacity, 42.3% have satisfactory level, 12.6% have low level of physical working capacity. It should be noted that as a result of the study we did not find any young men who would have a high level of physical capacity.
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Pierre MD, Joe. "Divided States." In False. Oxford University PressNew York, 2025. https://doi.org/10.1093/oso/9780197765272.003.0008.

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Abstract With the United States seeming irrevocably fractured along political and ideological lines these days, sitting down for Thanksgiving dinner with family has never been more uncomfortable. And yet, “affective polarization”—how we feel about our political opponents—has become more relevant than ideological polarization in explaining today’s political division today. Chapter 8 makes the case that the politics of racial identity is a vital part of our affective and ideological polarization, rooted as much in subtle and unconscious “implicit bias” as in overt and conscious racism. It argues that the ideological asymmetry of liberals and conservatives around issues of race provides a striking account of how motivated reasoning and motivated denial lies at the heart of political polarization and can pave a path toward democratic backsliding and authoritarianism. Adopting the perspective of a marriage counselor, it concludes with how we might put aside our differences in pursuit of common good.
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Parsons, Nick, and Philippe Pochet. "Wages and Collective Bargaining." In The Euro at 10. Oxford University PressOxford, 2008. http://dx.doi.org/10.1093/oso/9780199208869.003.0018.

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Abstract Since the introduction of the euro on 1 January 1999, monetary policy is no longer the preserve of national governments or central banks but of the European Central Bank (ECB). Although fiscal policy remains under the aegis of national governments, European budgetary constraints are present in the form of the Stability and Growth Pact (SGP). Essentially, Euro Area governments can no longer increase the money supply through interest rates or public spending in the hope of soaking up unemployment. In addition, a single European currency deprives national governments of the recourse to currency devaluation as a tool for improving economic competitiveness. Furthermore, a single currency enhances the transparency and comparability of wage levels across the Euro Area states. An additional problem is that the product and financial market integration at the heart of EMU is not mirrored by any federalist fiscal approach. Euro Area states cannot rely on the transfer of funds from one part (state) of the monetary union to another in order to secure adjustment to asymmetric shocks (which affect some states or regions but not the Euro Area as a whole). Given linguistic and cultural obstacles, labor migration is also unlikely to play an adjustment role in a near and medium term, as it can in optimum currency areas (Mundell 1961). Therefore, competitive wage levels and unit costs compared to other states become all the more important for national economic growth and employment.
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Hofmeister, Anne M., Robert E. Criss, and Everett M. Criss. "Links of planetary energetics to moon size, orbit, and planet spin: A new mechanism for plate tectonics." In In the Footsteps of Warren B. Hamilton: New Ideas in Earth Science. Geological Society of America, 2022. http://dx.doi.org/10.1130/2021.2553(18).

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ABSTRACT Lateral accelerations require lateral forces. We propose that force imbalances in the unique Earth-Moon-Sun system cause large-scale, cooperative tectonic motions. The solar gravitational pull on the Moon, being 2.2× terrestrial pull, causes lunar drift, orbital elongation, and an ~1000 km radial monthly excursion of the Earth-Moon barycenter inside Earth’s mantle. Earth’s spin superimposes an approximately longitudinal 24 h circuit of the barycenter. Because the oscillating barycenter lies 3500–5500 km from the geocenter, Earth’s tangential orbital acceleration and solar pull are imbalanced. Near-surface motions are enabled by a weak low-velocity zone underlying the cold, brittle lithosphere: The thermal states of both layers result from leakage of Earth’s internal radiogenic heat to space. Concomitantly, stress induced by spin cracks the lithosphere in a classic X-pattern, creating mid-ocean ridges and plate segments. The inertial response of our high-spin planet with its low-velocity zone is ~10 cm yr–1 westward drift of the entire lithosphere, which largely dictates plate motions. The thermal profile causes sinking plates to thin and disappear by depths of ~200–660 km, depending on angle and speed. Cyclical stresses are effective agents of failure, thereby adding asymmetry to plate motions. A comparison of rocky planets shows that the presence and longevity of volcanism and tectonism depend on the particular combination of moon size, moon orbital orientation, proximity to the Sun, and rates of body spin and cooling. Earth is the only rocky planet with all the factors needed for plate tectonics.
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Glied, Sherry. "The Circulation of the Blood AIDS, Blood, and the Economics of Information." In Blood Feuds. Oxford University PressNew York, NY, 1999. http://dx.doi.org/10.1093/oso/9780195129298.003.0012.

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Abstract The story of HIV and blood systems can be usefully divided into three eras: pre-1982, 1982-1985, and post-1985. The institutional structures of the blood systems in the 10 developed countries studied in the project from which this volume emerged were quite similar in the pre-1982 period. None of these systems implemented decisive measures for improving the quality of blood before 1985 (other than very limited efforts at donor exclusion), yet none failed to implement HIV testing and heat treatment by 1986. They differed mainly in the pace of implementing screening and heat treatment in the brief 1985-1986 period. Prior to 1982, these 10 countries developed similar institutional structures of blood collection and distribution that solved a common problem of asymmetric information about the quality of blood. Although this structure may have been optimal for dealing with the information problem presented by the principal threats to blood quality prior to 1982, the blood supply in each country became contaminated by HIV in 1982-1985. In every large developed country (population greater than 1 million) in Europe, Australia, and North America, people developed AIDS as a consequence of the transfusion of blood or blood products. My analysis will address why this happened and why all the national systems in our study failed to respond effectively over the 1982-1985 period, a failure that had particularly adverse con sequences in countries with relatively high rates of non-transfusion-related AIDS. Finally, I will examine the response of these national systems in the aftermath of the development of an HIV test in 1985.
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Conference papers on the topic "Heart rate asymmetry"

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Karmakar, Chandan, Ahsan Khandoker, Yoshitaka Kimura, and Marimuthu Palaniswami. "Investigating foetal heart rate asymmetry." In 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2014. http://dx.doi.org/10.1109/embc.2014.6944070.

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Moharreri, Sadaf, Shahab Rezaei, and Saman Parvaneh. "Using Heart Rate Fragmentation and Heart Rate Asymmetry to Discriminate Congestive Heart." In 2024 Computing in Cardiology Conference. Computing in Cardiology, 2024. https://doi.org/10.22489/cinc.2024.411.

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Parvaneh, Saman, Nader Jafarnia Dabanloo, Shahab Rezaei, Sadaf Moharreri, and Nima Toosizadeh. "Heart Rate Asymmetry in Response to Colored Light." In 2017 Computing in Cardiology Conference. Computing in Cardiology, 2017. http://dx.doi.org/10.22489/cinc.2017.320-369.

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Parvaneh, Saman, Nima Toosizadeh, and Sadaf Moharreri. "Impact of mental stress on heart rate asymmetry." In 2015 Computing in Cardiology Conference (CinC). IEEE, 2015. http://dx.doi.org/10.1109/cic.2015.7411030.

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Lykova, Ekaterina, and Ekaterina Zinchenko. "FEATURES OF HEART RATE VARIABILITY IN STUDENTS WITH DIFFERENT SENSORY ASYMMETRY." In XVI International interdisciplinary congress "Neuroscience for Medicine and Psychology". LLC MAKS Press, 2020. http://dx.doi.org/10.29003/m1132.sudak.ns2020-16/302.

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Karmakar, Chandan K., Herbert F. Jelinek, Paul Warner, Ahsan H. Khandoker, and Marimuthu Palaniswami. "Effect of gender and diabetes on major depressive disorder using heart rate asymmetry." In 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2014. http://dx.doi.org/10.1109/embc.2014.6945160.

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Li, Gang, Yue Liu, and Yongtian Wang. "Visual Fatigue Evaluation of Stereoscopic Display Based on Heart Rate Asymmetry and Ordinal Pattern Statistics." In 2015 International Conference on Virtual Reality and Visualization (ICVRV). IEEE, 2015. http://dx.doi.org/10.1109/icvrv.2015.63.

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De Maria, Beatrice, Laura Adelaide Dalla Vecchia, Monica Parati, et al. "Do Respiratory Sinus Arrhythmia and Respiratory Phase Durations Impact Heart Rate Variability Asymmetry in Healthy Subjects?" In 2020 11th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO). IEEE, 2020. http://dx.doi.org/10.1109/esgco49734.2020.9158025.

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Pawlowski, Rafal, and Katarzyna Buszko. "The Analysis of Transitions in Heart Rate Variability Obtained from Photo Plethysmograph – a Novel Insight into Asymmetry." In 2022 12th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO). IEEE, 2022. http://dx.doi.org/10.1109/esgco55423.2022.9931392.

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Ranuzzi, Giovanni, Vlasta Bari, Beatrice De Maria, Valeria Pistuddi, Marco Ranucci, and Alberto Porta. "Stratifying the Risk of Developing Atrial Fibrillation after Coronary Artery Bypass Graft Surgery Using Heart Rate Asymmetry Indexes." In 2017 Computing in Cardiology Conference. Computing in Cardiology, 2017. http://dx.doi.org/10.22489/cinc.2017.277-165.

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