Parasympathetic activity in brain death: effect of apnea on heart rate variability

1998 ◽  
Vol 42 (1) ◽  
pp. 47-51 ◽  
Author(s):  
M. Kawamoto ◽  
A. Sera ◽  
K. Kaneko ◽  
O. Yuge ◽  
M. Ohtani
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Brain Death ◽  
Parasympathetic Activity

scholarly journals A new analysis of heart rate variability in the assessment of fetal parasympathetic activity: An experimental study in a fetal sheep model

PLoS ONE ◽  
2017 ◽  
Vol 12 (7) ◽  
pp. e0180653 ◽  
Author(s):  
C. Garabedian ◽  
C. Champion ◽  
E. Servan-Schreiber ◽  
L. Butruille ◽  
E. Aubry ◽  
...  
Keyword(s):  
Heart Rate ◽  
Experimental Study ◽  
Heart Rate Variability ◽  
Parasympathetic Activity ◽  
Sheep Model ◽  
Fetal Sheep

scholarly journals Changes in Heart Rate Variability and Glycosylated Hemoglobin in Prediabetics and Type 2 Diabetes Mellitus

2017 ◽  
Vol 5 (1) ◽  
pp. 15-18
Author(s):  
A.K. Mishra ◽  
R.K. Jha ◽  
B.K. Kapoor
Keyword(s):  
Diabetes Mellitus ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Time Domain ◽  
Glycosylated Hemoglobin ◽  
Disease Process ◽  
Significant Rise ◽  
Parasympathetic Activity ◽  
Cardiac Autonomic Neuropathy

Background People with diabetes mellitus (DM) suffer from cardiac autonomic neuropathy (CAN), this may remain subclinical and reduced heart rate variability (HRV) is noticed as its early indicator.Objective The present study was undertaken to investigate the changes in heart rate variability and glycosylated hemoglobin (HbA1C) in (i) pre-diabetics, (ii) diabetics, (iii) non-diabetic subjects.Methods The present study enrolled 30 patients, diagnosed with type 2 DM and 30 prediabetic subjects aged between 30-60 years and compared with its aged matched healthy controls. In HRV, Time Domain (TD) parameters used were: SDNN, rMSSD, NN50 and pNN50%; and Frequency Domain (FD) parameters were: low frequency (LF), high frequency (HF) and LF/HF ratio. Glycosylated Hb and random blood sugar were measured.Results In HRV, though the time domain measures that reflects parasympathetic activity decreased was insignificant in the cases, the FD parameters such as LF reflecting activities of both division of ANS and HF reflecting only parasympathetic activity were found significantly reduced in diabetes and then control, whereas LF/HF ratio was increased only in diabetic patient (p<0.001) indicating sympathovagal imbalance. Rise in HbA1C was insignificant in prediabetic compared to control, which was observed significant only in diabetic (p< 0.001) patients.Conclusion Findings of the present study suggest that though HbA1c is an indicator of sustained hyperglycemia for monitoring glycemic level, even before its significant rise in plasma, alteration of sympatho-vagal balance over heart begins early in the disease process of diabetes.Journal of Advances in Internal Medicine 2016;05(01):15-18

Effect of provocative maneuvers on heart rate variability in subjects with quadriplegia

1995 ◽  
Vol 268 (6) ◽  
pp. H2239-H2245 ◽  
Author(s):  
D. R. Grimm ◽  
R. E. DeMeersman ◽  
R. P. Garofano ◽  
A. M. Spungen ◽  
W. A. Bauman
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Sympathetic Activity ◽  
Spectral Component ◽  
Low Frequency ◽  
Power Spectral Analysis ◽  
Parasympathetic Activity ◽  
Power Spectral ◽  
Spectral Components ◽  
Male Subjects

This study investigated heart rate variability (HRV) in individuals with quadriplegia who have disruption of autonomic control of the heart. Seven male subjects with neurological complete quadriplegia and seven with incomplete quadriplegia were studied at rest and during provocation. HRV was measured by power spectral analysis using a fast Fourier transform. Two spectral components were generated: 1) the high-frequency (HF) peak, a reflection of parasympathetic activity, and 2) the low-frequency (LF) peak, primarily sympathetic activity with some parasympathetic input. Results of the provocative maneuvers were grouped into one composite variable. Significant differences in the LF spectral component were found between the groups with complete and incomplete lesions in the supine position and after provocation (LF supine: P = 0.01; LF provocation: P = 0.002). After provocation, significant differences were demonstrated in the HF spectral component between these groups (P = 0.005). In contrast to previous findings, a LF component in subjects with complete quadriplegia was observed; this LF component decreased after provocation, suggesting the parasympathetic component withdrew during stressful maneuvers. There also appeared to be general downregulation of parasympathetic activity to the heart in subjects with complete quadriplegia. The presence of an increased LF spectral component during provocation in those with incomplete lesions implies sympathetic stimulation of the heart and may be used as a marker of sympathetic activity in individuals with quadriplegia.

Computer aided analysis of heart rate variability in brain death

1997 ◽  
Vol 14 (1) ◽  
pp. 37-42
Author(s):  
Dirk Knüttgen ◽  
Karsten zur Nieden ◽  
Martin-Rüdiger Müller-Gorges ◽  
Monika Jahn ◽  
Manfred Doehn
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Brain Death ◽  
Computer Aided Analysis ◽  
Computer Aided

Heart rate variability in brain death and coma

1985 ◽  
Vol 61 (3) ◽  
pp. S201
Author(s):  
G. Schwarz ◽  
G. Pfurtscheller ◽  
W. List
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Brain Death

Effect of Slow and Fast Music on the Autonomic Nervous System and Cardiac Health

2016 ◽  
pp. 198-218 ◽  
Author(s):  
Suraj Kumar Nayak ◽  
Rudra Dutt Shukla ◽  
Ipsita Panda ◽  
Biswajeet Champaty ◽  
Goutam Thakur ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Parasympathetic Activity ◽  
Ecg Signal ◽  
Autonomic Nervous ◽  
Cardiac Health ◽  
Conduction Pathway

In this study, the effect of slow and fast music on the heart rate variability and conduction pathway of the heart was studied. The results indicated an increase in the parasympathetic dominance as the volunteers were made to listen to music. The magnitude of the parasympathetic activity was higher when the volunteers were made to listen to fast music. This indicates that slow and fast music affected the sympatho-vagal balance in different proportions. The analysis of the ECG signal and wavelet transformed ECG signal suggested an alteration in the conduction pathway of the heart.

Sign in / Sign up

Export Citation Format

Share Document