Autonomic Nervous System Dysfunction in Stroke Patients: Clinical Asessment by Sympathetic Skin Response(SSR) and Heart Rate Variability.

AbstractBackground: Chinese university freshmen receive 4-weeks military training that involved moderate to intense physical exercise. Studies have demonstrated heterogeneous effects of exercise on the autonomic nervous system.Objective: To evaluate the effects of training on the autonomic nervous system noninvasively using electrogastrograms, heart rate variability (HRV), pulse rate, and the sympathetic skin response (SSR).Methods: Twenty freshmen received all assessments in the fasting state and after a standard meal: (1) one week before the training, (2) at the end of the second week of the training, and (3) one week after the training.Results: (1) The training had a significant effect on meal-induced gastric pacemaker activity. Before the training, a standard meal did not increase the dominant frequency of gastric slow waves, but the frequency increased during and after the training; (2) The preprandial high frequency (HF), low frequency (LF), and very low frequency (VLF) components of heart rate variability decreased significantly after the training. The ratio of the LF and HF (LF/HF) of the heart rate variability (HRV) did not significantly change after a meal or training condition. The basal pulse rate did not change. The latencies of the sympathetic skin response (SSR), as measured in the arm muscle, increased in response to the training.Conclusion: Military training affects meal-induced changes in gastric pacemaker activity, causes a marked reduction of the vagal tone to the heart with maintenance of the vagal-sympathetic balance, and its effects on SSR may reflect a reduction in sympathetic tone.

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S1954 Autonomic Nervous System Dysfunction in Cirrhosis - Heart Rate Variability. Does It Act As a Predictor of Variceal Bleed?

Gastroenterology ◽

10.1016/s0016-5085(08)63695-1 ◽

2008 ◽

Vol 134 (4) ◽

pp. A-791

Author(s):

Joye Varghese ◽

Arun Kumar Muthusamy ◽

Murali Krishnan K ◽

Jayanthi Venkatraman

Keyword(s):

Heart Rate ◽

Heart Rate Variability ◽

Nervous System ◽

Autonomic Nervous System ◽

Autonomic Nervous System Dysfunction ◽

Autonomic Nervous ◽

Variceal Bleed

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Autonomic Nervous System Dysfunction in Lifelong Premature Ejaculation: Analysis of Heart Rate Variability

Urology ◽

10.1016/j.urology.2012.08.029 ◽

2012 ◽

Vol 80 (6) ◽

pp. 1283-1286 ◽

Cited By ~ 12

Author(s):

Orhan Unal Zorba ◽

Yuksel Cicek ◽

Hakkı Uzun ◽

Mehmet Çetinkaya ◽

Kadir Önem ◽

...

Keyword(s):

Heart Rate ◽

Heart Rate Variability ◽

Nervous System ◽

Autonomic Nervous System ◽

Premature Ejaculation ◽

Autonomic Nervous System Dysfunction ◽

Autonomic Nervous ◽

Lifelong Premature Ejaculation

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Heart rate variability as an indicator of autonomic nervous system disturbance in tetanus

10.1101/793497 ◽

2019 ◽

Author(s):

Ha Thi Hai Duong ◽

Girmaw Abebe Tadesse ◽

Phung Tran Huy Nhat ◽

Nguyen Van Hao ◽

John Prince ◽

...

Keyword(s):

Heart Rate ◽

Heart Rate Variability ◽

Nervous System ◽

Autonomic Nervous System ◽

Clinical Signs ◽

Autonomic Nervous System Dysfunction ◽

Autonomic Nervous ◽

Non Invasive ◽

Nervous System Activity ◽

Grade 3

AbstractAutonomic nervous system dysfunction (ANSD) is a significant cause of mortality in tetanus. Currently diagnosis relies on non-specific clinical signs. Heart rate variability (HRV) may indicate underlying autonomic nervous system activity and represents a potentially valuable non-invasive tool for ANSD diagnosis in tetanus. HRV was measured from 3 5-minute ECG recordings during a 24-hour period in a cohort patients with severe tetanus, all receiving mechanical ventilation. HRV measurements from all subjects - 5 with ANSD (Ablett Grade 4) and 4 patients without ANSD (Ablett Grade 3) - showed HRV was lower than reported ranges for healthy individuals. Comparing different severities of tetanus, raw data for both time and frequency measurements of HRV were reduced in those with ANSD compared to those without. Differences were statistically significant in all except root mean square standard deviation RMSSD (p=0.07) indicating HRV may be a valuable tool in ANSD diagnosis.

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The Heart of an Endurance Athlete: Impact of and Recovery After an Ultra-Endurance Event.

10.21203/rs.3.rs-639854/v1 ◽

2021 ◽

Author(s):

Anton Swart ◽

Demitri Constantinou

Keyword(s):

Heart Rate ◽

Heart Rate Variability ◽

Nervous System ◽

Autonomic Nervous System ◽

The Body ◽

Mountain Biking ◽

Vagal Activity ◽

Autonomic Nervous System Dysfunction ◽

Autonomic Nervous ◽

Ultra Endurance

Abstract Background: Acute bouts of ultra-endurance exercise may cause an acute reduction in cardiac function, causing a physiological cascade which releases cardiac biomarkers. This study set out to determine the cardiac stress and recovery of participation in a three-day ultra-endurance mountain biking event of athletes using heart rate variability (HRV) as an outcome measure. Sixteen healthy participants (male and female) participating in a three-day ultra-endurance mountain biking event underwent a five-minute resting electrocardiography (ECG) recording in a supine position. Heart rate variability measurements were recorded two days before the race (baseline testing), after each race day, and at 24-hour post-event (recovery). Results: Time-domain and frequency domain measures showed significant (p≤0.05) changes from baseline in HRV parameters after each race day. The significant changes in HRV parameters reflected an increase in sympathetic activity after each day of the event. Our data revealed that the mean HR and RR variability variables did not return to baseline value after 24-hours of recovery, reflecting autonomic nervous system dysfunction, and that changes persisted for at least 24-hours post-event.Conclusion: Our study shows that competing in an ultra-endurance mountain bike event led to diminished vagal activity and a decrease in HRV throughout the event and persisted for at least 24-hours post-event. The body was under continuous sympathetic dominance during rest as well as during each day of racing, implying each race day can be considered a physiological stress. This may, in turn, cause a disturbance in homeostasis and an increase in autonomic nervous system dysfunction. This has implications for further research, including dysrhythmia risk, and monitoring of athletes in advising a return to strenuous activity.

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The heart of an endurance athlete: impact of and recovery after an ultra-endurance event.

10.1101/2020.07.16.20155127 ◽

2020 ◽

Author(s):

Anton Swart ◽

Demitri Constantinou

Keyword(s):

Heart Rate ◽

Heart Rate Variability ◽

Nervous System ◽

Autonomic Nervous System ◽

The Body ◽

Mountain Biking ◽

Vagal Activity ◽

Autonomic Nervous System Dysfunction ◽

Autonomic Nervous ◽

Ultra Endurance

Objectives Our study set out to determine the cardiac stress and recovery of participation in a three-day ultra-endurance mountain biking event of athletes using heart rate variability (HRV) as an outcome measure. Methods Sixteen healthy participants (male and female) participating in a three-day ultra-endurance mountain biking event underwent a five-minute resting ECG recording in a supine position. Heart rate variability measurements were recorded two days before the race (baseline testing), after each race day, and at 24-hour post-event (recovery). Results Time-domain and frequency domain measures showed significant (p≤0.05) changes from baseline in HRV parameters after each race day. Our study found significant changes in HRV parameters, all of which reflected an increase in sympathetic activity after each day of the event. These data also revealed that the mean HR and RR variability variables did not return to baseline value after 24-hours of recovery, reflecting autonomic nervous system dysfunction, and that changes persisted for at least 24-hours post-event. Conclusion Our study shows that competing in an ultra-endurance mountain bike event led to diminished vagal activity and a decrease in HRV throughout the event and persisted for at least 24 hours post-event. The body was under continuous sympathetic dominance during rest as well as during each day of racing, implying each race day can be considered a physiological stress. This may, in turn, cause a disturbance in homeostasis and an increase in autonomic nervous system dysfunction. This has implications for further research, including dysrhythmia risk, and monitoring of athletes in advising a return to strenuous activity.

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