Pub Date : 2021-12-25DOI: 10.15275/cardioit.2021.0201
V. Skazkina, K. Popov, N. Krasikova
The work aims to carry out a comparative analysis of the spectral indices of the photoplethysmogram signals and RR-intervals of healthy volunteers, patients with COVID-19, as well as patients with COVID-19 and chronic arterial hypertension of 1-2 degrees. The study included 45 records of pairs of electrocardiogram and photoplethysmogram signals. Each sample included 15 pairs of 20-minute experimental signals. The study revealed an increase in the integrated power of the low-frequency (LF) band over the integrated power of the high-frequency (HF) band in the photoplethysmogram signals in patients with COVID-19, burdened with hypertension. In the signals of the RR-intervals, the largest values of the ratio of the LF to HF indices are associated with patients without cardiovascular diseases. In turn, this may be an indicator of the different effects of viral infection and arterial hypertension on the loops of autonomic control of heart rate and vascular tone.
{"title":"Spectral analysis of signals of autonomic regulation of blood circulation in patients with COVID-19 and arterial hypertension","authors":"V. Skazkina, K. Popov, N. Krasikova","doi":"10.15275/cardioit.2021.0201","DOIUrl":"https://doi.org/10.15275/cardioit.2021.0201","url":null,"abstract":"The work aims to carry out a comparative analysis of the spectral indices of the photoplethysmogram signals and RR-intervals of healthy volunteers, patients with COVID-19, as well as patients with COVID-19 and chronic arterial hypertension of 1-2 degrees. The study included 45 records of pairs of electrocardiogram and photoplethysmogram signals. Each sample included 15 pairs of 20-minute experimental signals. The study revealed an increase in the integrated power of the low-frequency (LF) band over the integrated power of the high-frequency (HF) band in the photoplethysmogram signals in patients with COVID-19, burdened with hypertension. In the signals of the RR-intervals, the largest values of the ratio of the LF to HF indices are associated with patients without cardiovascular diseases. In turn, this may be an indicator of the different effects of viral infection and arterial hypertension on the loops of autonomic control of heart rate and vascular tone.","PeriodicalId":164423,"journal":{"name":"Cardio-IT","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116123056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-25DOI: 10.15275/cardioit.2021.0101
Tatiana S. Bibicheva, V. Skazkina, Marina V. Ogneva, M. Simonyan, V. Gridnev, A. Karavaev
This study examines missing value imputation in the Russian Acute Coronary Syndrome Registry (RusACSR) and assessment of the probability of predicting mortality. Linear methods with the most probable or average value were used for imputation. The prediction problem was solved using the k-nearest neighbors method. This work reveals that the imputation method, despite their simplicity, increases the probability of prediction of mortality by 6%.
{"title":"Missing value imputation with linear methods in the database of cardiological patients in prediction of mortality","authors":"Tatiana S. Bibicheva, V. Skazkina, Marina V. Ogneva, M. Simonyan, V. Gridnev, A. Karavaev","doi":"10.15275/cardioit.2021.0101","DOIUrl":"https://doi.org/10.15275/cardioit.2021.0101","url":null,"abstract":"This study examines missing value imputation in the Russian Acute Coronary Syndrome Registry (RusACSR) and assessment of the probability of predicting mortality. Linear methods with the most probable or average value were used for imputation. The prediction problem was solved using the k-nearest neighbors method. This work reveals that the imputation method, despite their simplicity, increases the probability of prediction of mortality by 6%.","PeriodicalId":164423,"journal":{"name":"Cardio-IT","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114192108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-30DOI: 10.15275/cardioit.2020.0102
M. Simonyan, O. Posnenkova, A. Kiselev
Currently, vegetative dysfunction considered to be one of principal mechanisms in the pathogenesis of cardiovascular pathology, which causes a cascade of events leading to changes in the properties and a structure of vascular wall. This review article contains literature from various databases (Russian science citation index, PubMed, Google Shcolar, Scopus). It presents the methods for assessing vegetative imbalance. In particular, the method of photoplethysmography (PPGV) is considered for recording periodic fluctuations at various frequencies in the distal vascular bed which characterize physiological processes (cardiac activity, respiratory influences, neurogenic, myogenic and endothelial activity). In addition, other diagnostic capabilities of PPGV such as heart rate (HR) assessment, determining the properties of vascular wall and the level of blood saturation are elucidated. This paper demonstrates a wide range of PPGV applications. The simplicity of PPGV reproduction and its cost-effectiveness make it feasible both in routine clinical practice for the purposes of screening for cardiovascular pathology, and for individual health monitoring incorporated in smart devices.
目前，植物性功能障碍被认为是心血管病理发病的主要机制之一，它引起一系列事件，导致血管壁性质和结构的改变。这篇综述文章包含来自不同数据库的文献(俄罗斯科学引文索引，PubMed, Google Shcolar, Scopus)。介绍了植物营养失衡的评价方法。特别是，光容积脉搏波描记法(PPGV)被认为可以记录远端血管床不同频率的周期性波动，这些波动表征了生理过程(心脏活动、呼吸影响、神经源性、肌源性和内皮活性)。此外，PPGV的其他诊断能力，如心率(HR)评估，确定血管壁的性质和血饱和度水平的阐明。本文展示了PPGV的广泛应用。PPGV复制的简单性及其成本效益使其在常规临床实践中用于心血管病理筛查和智能设备中的个人健康监测都是可行的。
{"title":"Capabilities of photoplethysmography as a method for screening of cardiovascular system pathology","authors":"M. Simonyan, O. Posnenkova, A. Kiselev","doi":"10.15275/cardioit.2020.0102","DOIUrl":"https://doi.org/10.15275/cardioit.2020.0102","url":null,"abstract":"Currently, vegetative dysfunction considered to be one of principal mechanisms in the pathogenesis of cardiovascular pathology, which causes a cascade of events leading to changes in the properties and a structure of vascular wall. This review article contains literature from various databases (Russian science citation index, PubMed, Google Shcolar, Scopus). It presents the methods for assessing vegetative imbalance. In particular, the method of photoplethysmography (PPGV) is considered for recording periodic fluctuations at various frequencies in the distal vascular bed which characterize physiological processes (cardiac activity, respiratory influences, neurogenic, myogenic and endothelial activity). In addition, other diagnostic capabilities of PPGV such as heart rate (HR) assessment, determining the properties of vascular wall and the level of blood saturation are elucidated. This paper demonstrates a wide range of PPGV applications. The simplicity of PPGV reproduction and its cost-effectiveness make it feasible both in routine clinical practice for the purposes of screening for cardiovascular pathology, and for individual health monitoring incorporated in smart devices.","PeriodicalId":164423,"journal":{"name":"Cardio-IT","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132647443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-25DOI: 10.15275/cardioit.2020.0103
S. Gul, O. C. Yontar, M. Yenerçağ, Onur Seker, Güney Erdoğan, U. Arslan
Background: The most common reason for sudden cardiac death in heart failure is malign ventricular arrhythmias. LCZ 696 improves hospitalization and sudden cardiac death outcomes in heart failure, however mechanisms in preventing sudden cardiac death are still unknown. There is little information available assessing effect of LCZ 696 on Tp-e interval and related calculations. In this study, we aimed to investigate the impact of Sacubitril/valsartan therapy on Tp-e interval, Tp-e/QT ratio and Tp-e/QTc ratio in heart failure patients and its reflections on clinical arrhythmogenesis. Methods: The study was designed as a prospective observational fashion. 265 patients with implantable cardioverter-defibrillator (ICD), who were on regular follow up at Samsun Training and Research Hospital Outpatient Heart Failure Clinic, were validated for the study. Clinical, echocardiographic, electrocardiogram and device data before initiation and six months after dose optimizing were obtained. Results: Stroke volume, cardiac output and ejection fraction significantly improved after LCZ 696 treatment. T wave related parameters, QT and QTC intervals significantly diminished. Furthermore, there was a negative correlation between baseline Tp-e interval duration and the absolute percentile increase of stroke volume(r:-0.234, p: 0.042) and cardiac output (r: -0.240, p: 0.037). Conclusion: In our study, switching Renin-Angiotensin-Aldosterone-System inhibitor with Angiotensin receptor/neprilysin inhibitor was associated with increase in left ventricle performance and decrease of sustained ventricular arrhythmias that required ICD shocks. These positive findings were accompanied by improvements in surface electrocaridogram changes such as Tp-e and related indices.
{"title":"Effect of angiotensin/neprilysin inhibition on ventricular repolarization and clinical arrhythmogenesis","authors":"S. Gul, O. C. Yontar, M. Yenerçağ, Onur Seker, Güney Erdoğan, U. Arslan","doi":"10.15275/cardioit.2020.0103","DOIUrl":"https://doi.org/10.15275/cardioit.2020.0103","url":null,"abstract":"Background: The most common reason for sudden cardiac death in heart failure is malign ventricular arrhythmias. LCZ 696 improves hospitalization and sudden cardiac death outcomes in heart failure, however mechanisms in preventing sudden cardiac death are still unknown. There is little information available assessing effect of LCZ 696 on Tp-e interval and related calculations. In this study, we aimed to investigate the impact of Sacubitril/valsartan therapy on Tp-e interval, Tp-e/QT ratio and Tp-e/QTc ratio in heart failure patients and its reflections on clinical arrhythmogenesis. Methods: The study was designed as a prospective observational fashion. 265 patients with implantable cardioverter-defibrillator (ICD), who were on regular follow up at Samsun Training and Research Hospital Outpatient Heart Failure Clinic, were validated for the study. Clinical, echocardiographic, electrocardiogram and device data before initiation and six months after dose optimizing were obtained. Results: Stroke volume, cardiac output and ejection fraction significantly improved after LCZ 696 treatment. T wave related parameters, QT and QTC intervals significantly diminished. Furthermore, there was a negative correlation between baseline Tp-e interval duration and the absolute percentile increase of stroke volume(r:-0.234, p: 0.042) and cardiac output (r: -0.240, p: 0.037). Conclusion: In our study, switching Renin-Angiotensin-Aldosterone-System inhibitor with Angiotensin receptor/neprilysin inhibitor was associated with increase in left ventricle performance and decrease of sustained ventricular arrhythmias that required ICD shocks. These positive findings were accompanied by improvements in surface electrocaridogram changes such as Tp-e and related indices.","PeriodicalId":164423,"journal":{"name":"Cardio-IT","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121735084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-12-18DOI: 10.15275/cardioit.2019.0202
E. Kotelnikova
{"title":"The Deming–Shuhart cycle in problems of modeling the process of telemedical rehabilitation and preventive monitoring of cardiological patients","authors":"E. Kotelnikova","doi":"10.15275/cardioit.2019.0202","DOIUrl":"https://doi.org/10.15275/cardioit.2019.0202","url":null,"abstract":"","PeriodicalId":164423,"journal":{"name":"Cardio-IT","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123096291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-06-25DOI: 10.15275/cardioit.2019.0101
V. Skazkina, M. Simonyan, Elena V. Navrotskay, Elena P. Chernets, A. N. Khramkov, Dmitriy M. Yezhov, A. Kiselev
{"title":"Comparing methods of the identification of phase in analysis of electroencephalogram and cardiointervalogrogram","authors":"V. Skazkina, M. Simonyan, Elena V. Navrotskay, Elena P. Chernets, A. N. Khramkov, Dmitriy M. Yezhov, A. Kiselev","doi":"10.15275/cardioit.2019.0101","DOIUrl":"https://doi.org/10.15275/cardioit.2019.0101","url":null,"abstract":"","PeriodicalId":164423,"journal":{"name":"Cardio-IT","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127274616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-06-25DOI: 10.15275/cardioit.2019.0102
O. Abrosimova, Ludmila A. Rycheva, O. Posnenkova
{"title":"The impact of environmental quality on the level of blood pressure and the prevalence of cardiovascular diseases among residents of Saratov","authors":"O. Abrosimova, Ludmila A. Rycheva, O. Posnenkova","doi":"10.15275/cardioit.2019.0102","DOIUrl":"https://doi.org/10.15275/cardioit.2019.0102","url":null,"abstract":"","PeriodicalId":164423,"journal":{"name":"Cardio-IT","volume":"64 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131166757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-25DOI: 10.15275/cardioit.2018.0201
Yurii M. Ishbulatov, A. Karavaev
The article presents a multicomponent model of the autonomic regulation of blood circulation, which takes into account the self-oscillatory properties of the regulation systems. The adequacy of the model was tested by reproducing the dynamics of the parameters of blood circulation after the pharmacological blockade of the regulatory systems.
{"title":"Simulation of autonomic blockade in mathematical model of cardiovascular regulation","authors":"Yurii M. Ishbulatov, A. Karavaev","doi":"10.15275/cardioit.2018.0201","DOIUrl":"https://doi.org/10.15275/cardioit.2018.0201","url":null,"abstract":"The article presents a multicomponent model of the autonomic regulation of blood circulation, which takes into account the self-oscillatory properties of the regulation systems. The adequacy of the model was tested by reproducing the dynamics of the parameters of blood circulation after the pharmacological blockade of the regulatory systems.","PeriodicalId":164423,"journal":{"name":"Cardio-IT","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133154571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-25DOI: 10.15275/cardioit.2018.0202
M. Simonyan
{"title":"Heart rate variability in patients with cardiomyopathy of various etiologies","authors":"M. Simonyan","doi":"10.15275/cardioit.2018.0202","DOIUrl":"https://doi.org/10.15275/cardioit.2018.0202","url":null,"abstract":"","PeriodicalId":164423,"journal":{"name":"Cardio-IT","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131406630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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