scholarly journals Characteristic Electrocardiography Findings of COVID-19 Patients

2021 ◽  
Vol 24 (9) ◽  
pp. 706-712
Author(s):  
Ali Gur ◽  
Zeynep Ulutas
Keyword(s):  
Heart Rate ◽  
Early Diagnosis ◽  
Qt Interval ◽  
Patient Management ◽  
Sinus Tachycardia ◽  
Control Group ◽  
Acute Period ◽  
Significant Difference ◽  
Pr Interval ◽  
Bundle Branch Blocks

Background: Determining a relationship between coronavirus disease 2019 (COVID-19) and the ECG findings of the patients with this disease can assist in early diagnosis and patient management based on these findings. This study aimed to investigate whether COVID-19 patients had characteristic ECG findings in the acute period. Methods: A total of 124 patients were divided into two groups as those diagnosed with COVID-19 and controls. The ECGs of these patients were evaluated in terms of rate, rhythm, presence of ST changes, PR interval, QRS width, QTc and QT interval, and presence of right and left bundle branch blocks. Results: On the ECG, the median heart rate of the COVID-19 patients was 104/min (IQR: 99–114), and there was a significant difference compared to the control group (P<0.001). The median PR interval was 157/ms, the QRS width was 86 ± 9/ms in the COVID-19 patients, with no significant difference compared to the controls (P = 0.161 and P = 0.631, respectively). The median QT interval of the COVID-19 patients was normal (400/ms), but a significant difference was detected compared to the controls (P = 0.005). The QTc, ST change, AF, and presence of right and left bundle branch blocks were not significantly different between the two groups. Conclusion: Considering the importance of ECG findings in order to diagnose COVID-19 disease early, we can state that sinus tachycardia is very common in COVID-19 patients, but there is no characteristic ECG finding for COVID-19, including tachycardia.

scholarly journals Electrocardiographic Pattern of Agoutis (Dasyprocta prymnolopha) Chemically Contained by the Association of Ketamine and Xylazine

2017 ◽  
Vol 45 (1) ◽  
pp. 9
Author(s):  
Osmar Ferreira da Silva Filho ◽  
Gerson Tavares Pessoa ◽  
Renan Paraguassu de Sá Rodrigues ◽  
Andrezza Braga Soares da Silva ◽  
Laecio Da Silva Moura ◽  
...  
Keyword(s):  
Heart Rate ◽  
Qt Interval ◽  
Statistical Difference ◽  
Handling Time ◽  
Wild Animals ◽  
Significant Difference ◽  
Pr Interval ◽  
Cardiac Evaluation ◽  
Almost All ◽  
Electrocardiographic Parameters

Background: The agouti (Dasyprocta prymnolopha, Wagler, 1831) is an existing wild rodent in almost all of Brazil, used as a biological model in several scientific studies. Veterinary cardiology has showed great advances in the diagnostic area due to the possibility of cardiac evaluation by non-invasive methods. For the practice of scientific or handling procedures in wild animals, chemical containment is essential. Thus, it is important to know the effect of anesthetic protocols on the cardiovascular system, observed through complementary tests, such as the electrocardiogram. The objective of this study was to describe the computerized electrocardiographic tracing of agoutis chemically contained by the association of Ketamine and Xylazine.Materials, Methods & Results: Eighteen male and female clinically healthy animals, aged among 2 years, submitted to digital electrocardiographic examination, were used. The device used to obtain the tracing was the veterinary electrocardiograph (Electrocardiogram Acquisition Module for Computer) - Brazilian Electronic Technology (TEB). The analysis was always made from derivation II (DII). Chemical containment was performed by the combination of Ketamine and Xylazine, intramuscularly. The results showed that the heart rate for males was on average 113.25 bpm, while for females the value of 124.60 bpm was observed, and there was no significant difference between the genders (P > 0.05). The mean weight of males was 2.31 kg and for females 2.28 kg; there was no statistical difference for this variable (P > 0.05). For the QRS duration of 46.14 ± 5.05 ms (males) and 44.66 ± 5.94 ms (females) and PR interval of 79.94 ± 12.01ms (males) and 84.29 ± 12.37ms (females), there was no statistical difference (P > 0.05). The amplitude of the R wave of 0.42 ± 0.31 mV (males) and 0.36 ± 0.22 mV (females) showed no statistical difference (P > 0.05). The T wave showed itself both negative (10 animals) and positive (8 animals), with amplitude measured at 0.24 ± 0.16 mV for males and 0.25 ± 0.10 mV for females (P > 0.05). The anesthetic protocol was well tolerated by the animals of this experiment, and there were no episodes of arrhythmias during the time of their monitoring.Discussion: Wild animals, in general, need chemical containment, with a view to reducing stress during scientific and handling procedures. The protocols established in this work can be used in future experiments which require a longer handling time. The values found for heart rate (HR) of anesthetized agoutis were lower than those for non-anesthetized agoutis, proving the influence of the stress during retention and the depressant cardiovascular effect of the anesthetic drug used. The electrocardiographic parameters and the tracing morphology of the agoutis were like the results found for anesthetized small rodents. The QT interval was higher in males than in females, justifying the fact that it could be influenced by variations in HR, which also showed superior results for males. Taking into consideration the morphological similarity between different individuals, the QT interval in anesthetized agoutis did not present significant differences between the genders, a characteristic also found in ferrets. The animals of this experiment were submitted to food fasting, a fact that contributed to a better standardization of the experiment, preventing alterations in the morphology of the QRS complex, which could lead to changes in the measurements.

scholarly journals ECG abnormalities among HIV infected children placed on ART at Enugu, South East of Nigeria

2020 ◽  
Vol 20 (4) ◽  
pp. 1742-8
Author(s):  
Emeka Spiff Eleazar ◽  
Clara Idara Eleazar ◽  
Daniel Chukwu Nwachukwu ◽  
Uchenna Ifeanyi Nwagha
Keyword(s):  
Heart Rate ◽  
Highly Active Antiretroviral Therapy ◽  
Control Group ◽  
Qtc Interval ◽  
Protective Effects ◽  
Cross Sectional ◽  
Keywords Hiv ◽  
Significant Difference ◽  
Pr Interval ◽  
Qrs Duration

Background: Cardiovascular abnormalities are not much reported among human immunodeficiency virus (HIV) infected children especially in Africa where there is high HIV disease. In addition, the use of highly active antiretroviral therapy (HAART) in such children may have a protective effect on the cardiovascular system. Methods: Cross-sectional study of randomly selected eighty HIV infected and 80 aged matched non- HIV-infected chil- dren were used. HIV-infected children were on HAART for more than 5years and had steadily received the treatment for 6 months prior to the time of the tests. Heights and weights were measured and body mass index calculated. Cardiac indi- ces evaluated were heart rate (HR), PR interval, QRS duration, QT/QTC Interval, P/QRS/T Axis, RV5/SV1 voltage and RV5+SV1 voltage. Results: The average heart rate was significantly higher among HIV infected children on HAART than their non-infected counterparts (P= 0.019). At 0.05 significance level, their PR interval was significantly higher than those in the control group (P=0.050). The average QRS duration result also showed a significant difference between that of test and control subjects (P = 0.022) Conclusion: The HAART usage possibly improved the cardiovascular functioning in the infected children but the protective effects diminish with increase age and longer exposure. Keywords: HIV; cardiovascular; children; HAART.

Heart rate variability in children with acute rheumatic fever

2011 ◽  
Vol 22 (3) ◽  
pp. 285-292 ◽  
Author(s):  
Mehmet Karacan ◽  
Naci Ceviz ◽  
Haşim Olgun
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Rheumatic Fever ◽  
Frequency Domain ◽  
Acute Rheumatic Fever ◽  
Control Group ◽  
P Value ◽  
Acute Period ◽  
Systemic Inflammatory Disease ◽  
Pr Interval

AbstractObjectiveAcute rheumatic fever is a systemic inflammatory disease occurring after acute streptococcal tonsillopharyngitis. The PR prolongation in these patients is thought to be due to increased vagal activity. There has been no previous study investigating the autonomic balance in patients with acute rheumatic fever. In this study, we aimed to investigate the balance of the autonomic nervous system in children with acute rheumatic fever by analysis of heart rate variability.MethodsWe evaluated the heart rate variability parameters in 50 patients with acute rheumatic fever and 37 comparable control subjects. Both groups underwent 24-hour electrocardiography monitoring, and time- and frequency-domain heart rate variability parameters were calculated. A total of 39 patients (78%), with (n = 28) or without (n = 11) other major findings, had carditis, and the remaining 11 (22%) did not. The PR interval was found to be prolonged in 10 (20%) of the patients at the beginning.ResultsIn the study group, the time- and frequency-domain heart rate variability parameters showed a sympathetic dominance compared with the control group, with a p-value less than 0.05. When compared with the control group, the time- and frequency-domain heart rate variability parameters showed a significant sympathetic dominance in patients with both prolonged PR and normal PR intervals in the acute period, with a p-value less than 0.05. When compared with patients with normal PR interval, mean normalised low frequency and normalised high frequency parameters suggested a relatively lower sympathetic dominance in patients with prolonged PR interval, with a p-value less than 0.05.ConclusionOur results indicated that in the acute period of rheumatic fever, sympathetic dominance is apparent; in patients with prolonged PR interval, sympathetic dominance is relatively lower when compared with the patients with normal PR interval.

scholarly journals Anesthetic Effect of Compound Artevacaine Hydrochloride in Patients Undergoing Oral Implantation

2021 ◽  
Vol 5 (4) ◽  
pp. 220-224
Author(s):  
Chengxi Chi ◽  
Mengmeng Zhao ◽  
Jiajing He ◽  
Yanli Wang
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Operation Time ◽  
Control Group ◽  
Study Group ◽  
Research Subjects ◽  
Implant Surgery ◽  
Anesthetic Effect ◽  
Significant Difference ◽  
Oral Implant

Objective: To investigate and analyze the anesthetic effect of compound artevacaine hydrochloride in patients undergoing oral implantation. Methods: In this study, 60 patients receiving oral implant surgery in our hospital were selected as the research subjects, and the operation time was from July 2019 to March 2021. Patients were randomly selected and divided into groups for the study. 30 patients receiving lidocaine hydrochloride anesthesia were used as the control group, and 30 patients receiving compound artevacaine hydrochloride anesthesia were used as the research group. The anesthetic effect and safety of the two groups were compared and analyzed. Results: The anesthetic effect of the study group was significantly better than that of the control group (P < 0.05). The blood pressure and heart rate in the study group were significantly lower than those in the control group (P < 0.05). There was no significant difference in blood pressure and heart rate between the two groups before anesthesia (P > 0.05). There was no significant difference in the incidence of ADR between the two groups (P > 0.05). Conclusions: For patients undergoing oral implant surgery, choosing compound artevacaine hydrochloride as anesthetic drug has obvious anesthetic effect and can stabilize patients' life indexes. The anesthetic effect is obvious, and there is no obvious adverse reaction, and the clinical value is obvious.

Hypoxic Challenge Testing (Fitness to Fly) in children with complex congenital heart disease

Heart ◽  
2018 ◽  
Vol 104 (16) ◽  
pp. 1333-1338 ◽  
Author(s):  
Nitha Naqvi ◽  
Victoria L Doughty ◽  
Luke Starling ◽  
Rodney C Franklin ◽  
Simon Ward ◽  
...  
Keyword(s):  
Heart Rate ◽  
Congenital Heart Disease ◽  
Heart Disease ◽  
Qt Interval ◽  
Congenital Heart ◽  
Supplemental Oxygen ◽  
Complex Congenital Heart Disease ◽  
Challenge Testing ◽  
Significant Difference ◽  
Fraction Of Inspired Oxygen

ObjectiveCommercial airplanes fly with an equivalent cabin fraction of inspired oxygen of 0.15, leading to reduced oxygen saturation (SpO2) in passengers. How this affects children with complex congenital heart disease (CHD) is unknown. We conducted Hypoxic Challenge Testing (HCT) to assess need for inflight supplemental oxygen.MethodsChildren aged <16 years had a standard HCT. They were grouped as (A) normal versus abnormal baseline SpO2 (≥95% vs <95%) and (B) absence versus presence of an actual/potential right-to-left (R–L) shunt. We measured SpO2, heart rate, QT interval corrected for heart rate and partial pressure of carbon dioxide measured transcutaneously (PtcCO2). A test failed when children with (1) normal baseline SpO2 desaturated to 85%, (2) baseline SpO285%–94% desaturated by 15% of baseline; and (3) baseline SpO275%–84% desaturated to 70%.ResultsThere were 68 children, mean age 3.3 years (range 10 weeks–14.5 years). Children with normal (n=36) baseline SpO2 desaturated from median 99% to 91%, P<0.0001, and 3/36 (8%) failed the test. Those with abnormal baseline SpO2 (n=32) desaturated from median 84% to 76%, P<0.0001, and 5/32 (16%) failed (no significant difference between groups). Children with no R–L shunt (n=25) desaturated from median 99% to 93%, P<0.0001, but 0/25 failed. Those with an actual/potential R–L shunt (n=43) desaturated from median 87% to 78%, P<0.0001, and 8/43 (19%) failed (difference between groups P<0.02). PtcCO2, heart rate and QT interval corrected for heart rate were unaffected by the hypoxic state.ConclusionsThis is the first evidence to help guide which children with CHD need a preflight HCT. We suggest all children with an actual or potential R–L shunt should be tested.

scholarly journals Effects of Long-Term Gentle Handling on Behavioral Responses, Production Performance, and Meat Quality of Pigs

Animals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 330 ◽  
Author(s):  
Chao Wang ◽  
Yongjie Chen ◽  
Yanju Bi ◽  
Peng Zhao ◽  
Hanqing Sun ◽  
...  
Keyword(s):  
Heart Rate ◽  
Meat Quality ◽  
Average Daily Gain ◽  
Production Performance ◽  
Control Group ◽  
Carcass Quality ◽  
Feed Conversion ◽  
Significant Difference

In order to investigate the effect of gentle handling on the behavior, performance, and meat quality of pigs from weaning to slaughter, 144 6-week-old weaned hybrid Min piglets (a native breed) were selected and divided into a handling group (HG: 9 pens × 8 pigs) and a control group (CG: 9 pens × 8 pigs). After 6 weeks of handling, we observed and then evaluated the pigs’ responses to a handler with behavioral scores. Moreover, we measured heart rate and production performance. Three pigs were randomly selected from each of the 18 pens and divided into a handling group (HG: n = 27) and a control group (CG: n = 27), and the HG pigs were given gentle handling until slaughter. Subsequently, we evaluated meat quality and the production performance of six pigs from each group. The results show that AA test (approaching–avoidance test) scores in HG pigs, the number of contacts with the handler and absence of contact with the handler, were significantly higher than in the CG pigs (p < 0.01). The occurrences of avoidance and looking at the handler were lower in the HG than in the CG group (p < 0.01); however, heart rate was not found to be significantly different between the two groups (p = 0.63). No significant difference was found in the average daily gain, average daily feed intake, and feed conversion ratio between the two groups during the two periods (p > 0.05). The b* value was determined 45 min after slaughter, and it was significantly lower in the HG than that in the CG group (p = 0.002). Furthermore, 2 h after slaughter, the L value of the HG group was significantly higher than that of the CG group (p = 0.047), but no difference was observed in carcass quality or other meat quality indicators between the two groups (p > 0.05). The results indicate that gentle handling could reduce pigs’ anxiety and increase their willingness to approach the handler, increasing the intimacy of the pigs and handlers. However, long-term gentle handling had little effect on pig performance, carcass quality, and meat quality.

The Comparisons of Heart Rate Variability and Perceived Exertion During Simulated Cycling with Various Viewing Devices

2008 ◽  
Vol 17 (6) ◽  
pp. 575-583 ◽  
Author(s):  
Shih-Fong Huang ◽  
Po-Yi Tsai ◽  
Wen-Hsu Sung ◽  
Chih-Yung Lin ◽  
Tien-Yow Chuang
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Spectral Density ◽  
Power Spectral Density ◽  
Perceived Exertion ◽  
Low Frequency ◽  
Control Group ◽  
Threshold Intensity ◽  
Power Spectral ◽  
Significant Difference

Sympathovagal modulation during immersion in a virtual environment is an important influence on human performance of a task. The aim of this study is to investigate sympathovagal modulation using heart rate variability and perceived exertion during exercise in a virtual reality (VR) environment. Sixteen young healthy volunteers were tested while using a stationary bicycle and maintained at an anaerobic threshold intensity for exercise sessions of approximately 10 min duration. Four randomized viewing alternatives were provided including desktop monitor, projector, head mounted device (HMD), and no simulation display. The “no simulation display” served as the control group. A quick ramp exercise test was conducted and maintained at an anaerobic threshold intensity for each session to evaluate power spectral density and rating of perceived exertion (RPE). The sampled heart rate data were rearranged by cubic spline interpolation into power spectrums spanning the ultra-low frequency (ULF) to high frequency (HF) range. A significant difference was found between the no-display and projector groups for total power (TP) and very low frequency (VLF) components. In particular, there was a significant difference when comparing HMD and no-display exercise RPE curves within 6 min of cycling and at the termination of the exercise. A significant difference was also achieved in projector vs. control group comparison at the termination of the exercise. Our results indicate that the use of HMD and the projected VR during cycling can reduce the TP and VLF power spectral density through a proposed decrease in the renin-angiotensin system, with the implication that this humoral effect may enable anaerobic exercise for longer durations through a reduction in sympathetic tone and subsequent increased blood flow to the muscles.

scholarly journals Effect of Various Concentrations of Lignocaine & Adrenaline Combination as Local Anesthetic on ECG Parameters of Patients Undergoing Dental Procedures

2019 ◽  
pp. 32-37
Author(s):  
Sinare B R ◽  
Annasaheb Gagare ◽  
Chinmaye Batwal ◽  
Liz Thaliath ◽  
Prashant Patel ◽  
...  
Keyword(s):  
Heart Rate ◽  
Maxillofacial Surgery ◽  
Systemic Absorption ◽  
Qtc Interval ◽  
Qtc Dispersion ◽  
Rr Interval ◽  
Dental Procedures ◽  
Significant Difference ◽  
Pr Interval ◽  
Group A

Background: Systemic absorption of local anesthetics occurs due to its local vasodilator effects. This leads to inhibitory action on the heart which is represented in the form of a decrease in conduction rate, the excitability of myocardium and force of contraction. The aim of the present study was to evaluate the effects of Lignocaine and adrenaline combinations on electrocardiogram undergoing dental procedures. Methods: This was a prospective, observational clinical study done in collaboration with the Department of Oral & Maxillofacial Surgery. All patients scheduled for oral surgeries under local anesthesia with Lignocaine 2% and adrenaline (1:80000 or 1:200000) combination of age 18 years or above 150 patients were included in the study. Patients with a history of hepatic, renal, cardiovascular and thyroid disorders were excluded from the study. A standard 12-lead ECG (25 mm/s) was recorded for each patient before administration of drugs (Basal), during the dental procedure (Intraoperative) and immediately after completion of surgical procedure. Results: There was no statistically significant difference seen between the Group A (Lignocaine 2% with 1:80000 adrenaline) and B (Lignocaine 2% with 1:200000 adrenaline) when the age, gender, PR interval, RR interval, mean QT & QTc dispersion, and heart rate were compared. Statistically significant difference was seen in comparing the mean QT & QTc interval, which was higher in Group A. ECG parameters in Group A and B showed a statistically significant decrease in PR interval, RR interval, QT interval, QTc interval, QT dispersion and QTc dispersion, with the basal, was compared with intraoperative and postoperative findings. The increase in heart rate although was statistically significant in both the groups, it was always within normal limits suggestive of no clinical significance. There was a statistically significant decrease in QT and QTc interval, QT and QTc dispersion. The change in all these parameters was within the physiologic range. All these relevant parameters for cardiac arrhythmias did not show any arrhythmogenic potential of lignocaine-adrenaline combination in both the groups. Both the combinations are comparable with each other in terms of ECG parameters with changes more with group A suggesting the effect of increased concentration of adrenaline. The change in the heart rate and ECG parameters in both the study group might be attributed to the presence of adrenaline in the combination. No cardiovascular morbidities were observed except palpitation. Conclusion: Thus it can be very well concluded that the effects of lignocaine-adrenaline combinations on electrocardiographic parameters are minimal and clinically irrelevant. Both the combination appears to be safe to use in healthy individuals. Keywords: Adrenaline; Lignocaine; ECG parameters; Dental procedures.

scholarly journals Application of Mediastinal Drainage Tube in Intrathoracic Esophageal Anastomotic Leakage for Early Diagnosis and Effective Treatment: A Retrospective Study

2020 ◽  
Author(s):  
Hainong Ma ◽  
Xu Song ◽  
Jie Li ◽  
Guofang Zhao
Keyword(s):  
Early Diagnosis ◽  
Anastomotic Leakage ◽  
Esophageal Resection ◽  
Drainage Tube ◽  
Control Group ◽  
Common Symptom ◽  
Pleural Drainage ◽  
Significant Difference ◽  
Mediastinal Drainage ◽  
Almost All

Abstract Background: Intrathoracic esophageal anastomotic leakage (AL) is one of the most fatal complications after esophagectomy. In this study, we tried to place an additional drainage tube in esophagus bed and evaluate its effect in early diagnosis and treatment of AL.Methods: From January 2010 to August 2020, a total of 312 patients, who suffered from esophageal or cardia carcinoma, underwent esophageal resection with intrathoracic esophagogastric anastomosis. Among them, we identified 138 patients with only one pleural drainage tube as “Control Group” and 174 patients with a pleural drainage tube and an additional mediastinal drainage tube (MDT) as “Tube Group”. The incidence of postoperative AL, time to diagnosis, time to recovery, and patient outcome were analyzed.Results: There were no significant differences in the AL rate (P = 0.837) and postoperative pain between two groups. However, in the Tube Group, almost all the patients were definitely diagnosed prior to the appearance of hyperpyrexia, which was regarded as the earliest and most common symptom after AL. Moreover, in the Tube Group, there was significant decrease in the incidence of uncurable fistula, which required re-operation or variable treatments under gastroscopy, when compared to the Control Group (P = 0.032). Finally, patients in the Tube Group were associated with reduced post AL hospital day (P = 0.015) and lower mortality, although there was no significant difference (P = 0.188), than in the Control Group.Conclusions: Placement of a MDT can not prevent the AL, but it is an effective method to diagnose AL earlier and facilitate the fistula healing and patient recovery.

scholarly journals DYNAMICS OF HEART RATE VARIABILITY IN CHILDREN OPERATED FOR VENTRICULAR SEPTAL DEFECT IN ТНЕ PROCESS OF SANATORIAL SPA TREATMENT

2020 ◽  
Vol 26 (3) ◽  
pp. 68-70
Author(s):  
N. N. Kaladze ◽  
А. Уи. Iushchenko ◽  
V. N. Lukyanenko ◽  
М. Е. Kutkin
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Ventricular Septal Defect ◽  
Septal Defect ◽  
Medical Rehabilitation ◽  
Control Group ◽  
Healthy Children ◽  
Time Analysis ◽  
Nordic Walking ◽  
Significant Difference

The purpose of the study is to study the effectiveness of medical rehabilitation in children operated on for a ventricular septal defect, based on the dynamics of heart rate variability indicators. Material and methods of research. Heart rate variability was evaluated in 75 children operated on for ventricular septal defect. The control group (CG) consisted of 30 healthy children. The effectiveness of medical rehabilitation was assessed by the dynamics of heart rate variability indicators. Children of the 1st group (20 people) took the cardiometabolic drug Elkar at a dose of 30 mg/kg/day for 1 month. With children of the 2nd group (20 people) for 3 months, Nordic walking classes were held (NW). In addition, children of the 2nd group received the drug Elkar for 1 month (30 mg/kg). Results. According to the time analysis of heart rate variability, operated children had significantly lower values of SDNN 82 [69;103] (p<0.001), SDANNi 50.5 [39;87] (p<0.05), SDNNi 69.5 [54;80] (p<0.05), rMSSD 50.5 [39;87] (p<0.05), pNN50 % 18.4 [6.7;28.3] (p<0.05) lower power in the high-frequency range of the spectrum (p<0.001) and a change in the vegetative balance towards the predominance of the sympathetic division of the autonomic nervous system (LF/HF=3.16, p=0.009) than in the control group. After the treatment, there was no reliable HRV dynamics in children who received Elcar. There was a significant difference between SDNN and rMSSD with KG. In the second group, there was a significant increase in HRV according to SDNN data by 37.7 % (p<0.01), SDANNi by 45.6 % (p<0.05), rMSSD by 6.5 % (p<0.05), pNN50 % by 32.7 % (p<0.05). The difference in indicators with CG is leveled. Conclusions. In children operated on for VSD, there was a decrease in the parameters of the time analysis of HRV in comparison with healthy peers (p<0.05). The combined use of Nordic walking and Elkar have a normalizing effect on the HRV, causing a decrease in the tension of the Central circuit of heart rate regulation, significantly increasing the parasympathetic effect on the heart rate.

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