scholarly journals Advances in Physiological Cardiac Stimulation

2021 ◽  
Vol 34 (1) ◽  
pp. 45-47
Author(s):  
Gustavo Galli Reis ◽  
Andres Di Leoni Ferrari ◽  
Gustavo Chiari Cabral ◽  
Guilherme Ferreira Gazzoni ◽  
Luis Manuel Ley ◽  
...  
Keyword(s):  
Rate Control ◽  
Heart Rate Control ◽  
Spatial Variance ◽  
Cardiac Stimulation ◽  
Therapeutic Modalities ◽  
Ventricular Synchrony ◽  
Ventricular Stimulation ◽  
Bundle Of His ◽  
The Right ◽  
Stimulation Of

Advances in cardiac stimulation demonstrate that bradyarrhythmia treatments go beyond heart rate control. The concern with the ventricular stimulation site and, consequently, with the maintenance of intraventricular synchrony has become routine in most services. Techniques of physiological cardiac stimulation, such as stimulation of the bundle of His and the left branch, have been improved. Despite the indisputable benefits of these therapeutic modalities, there are technical difficulties that limit systematic use. In this sense, to make physiological cardiac stimulation more practical and reproducible, the concept of parahissian stimulation was expanded and studied. The technique, simpler and reproducible, contemplates a conventional approach of the right ventricle. The big difference is the use of QRS spatial variance analysis technology (Synchromax®, Exo S.A., Argentina) to confirm the maintenance of ventricular synchrony according to the implanted site.

INFLUENCE OF RIGHT VENTRICULAR LEAD IMPLANTATION SITE CHOICE ON PACING EFFICIENCY

2020 ◽  
pp. 13-17
Author(s):  
Dmitrii Aleksandrovich Lopyn ◽  
Stanislav Valerevich Rybchynskyi ◽  
Dmitrii Evgenevich Volkov
Keyword(s):  
Heart Failure ◽  
Right Ventricular ◽  
Longitudinal Strain ◽  
Treatment Options ◽  
Global Longitudinal Strain ◽  
Optimal Method ◽  
Cardiac Stimulation ◽  
Ventricular Lead ◽  
The Right ◽  
Stimulation Of

Currently the electrophysiological treatment options have been considered to be the most effective for many patients with arrhythmogenic cardiomyopathies, as well as in those with arrhythmias on the background of heart failure. Currently, the dependence of efficiency of the pacemakers on the location of the electrodes has been proven. In order to study the effect of a myocardial dysynchrony on the effectiveness of pacing depending on the location of the right ventricular electrode, an investigation has been performed. This study comprised the patients with a complete atrioventricular block, preserved ejection fraction of the left ventricle (more than 50 %), with no history of myocardial infarction, who were implanted with the two−chamber pacemaker. It has been established that the best results were achieved with a stimulation of the middle and lower septal zone of the right ventricle, the worst ones were obtained with a stimulation of its apex. It has been found that the dynamics of the magnitude of segmental strains and a global longitudinal strain coincided with the dynamics of other parameters of the pacemaker effectiveness, which indicated the pathogenetic value of myocardial dysynchrony in the progression of heart failure after implantation of the pacemaker. Therefore it could be concluded that the studying of myocardial mobility by determining a longitudinal strain for assessing the functional state of the myocardium and the effectiveness of pacing is highly advisable. It is emphasized that the use of the latest strains−dependent techniques for cardiac performance evaluation in the patients with bradyarrhythmia have a great potential to predict the development of chronic heart failure and to choose the optimal method of physiological stimulation of the heart. Key words: right ventricular lead, cardiac stimulation, myocardial dyssynchrony.

scholarly journals INFLUENCE OF PERMANENT PACING OF THE ATRIA FROM UPPER ANTERIOR AREA OF INTERCARDIAC SEPTA (AREA OF BAKHMAN’S FASCICLES) ON THE PART OF AMOTIVATIONAL VENTRICLE STIMULATION

2016 ◽  
Vol 175 (2) ◽  
pp. 12-16
Author(s):  
M. V. Didenko ◽  
G. S. Pasenov ◽  
G. G. Khubulava
Keyword(s):  
Right Ventricle ◽  
Sinus Node ◽  
Right Atrial ◽  
Permanent Pacing ◽  
Ventricular Stimulation ◽  
The Right ◽  
Stimulation Of

This research includes 74 patients with syndrome of the sinus node asthenia. The application of permanent bilocular pacing was indicated for these patients. An atrial electrode was located in the right atrial auricle in 37 patients and it was in the area of Bakhman’s fascicles in other 37 patients. All the patients had a stimulated atrio-ventricular delay on 250 ms, but sensing delay was shorter on 20 ms. Given data were analyzed after operation in the periods of 6 and 12 months. Cumulative percent of ventricular stimulation was significantly less in the group with electrode in the area of Bakhman’s fascicles (6%) as compared with the group where electrode installed in the right atrial auricle (41%) after 6 months. There were 4% in comparison with 43% after 12 months. The localization of atrial electrode in the area of Bakhman’s fascicles led to reduction of cumulative percent of ventricular stimulation on 35% after 6 months and on 39% after 12 months. Permanent pacing in the area of Bakhman’s fascicles could be an effective mode to decrease the part of amotivational stimulation of the right ventricle.

A Mathematical Model of Heart Rate Control by Sympathetic and Vagus Efferent Information

SIMULATION ◽  
1964 ◽  
Vol 3 (1) ◽  
pp. 63-71 ◽  
Author(s):  
Homer R. Warner ◽  
Albert Cox
Keyword(s):  
Mathematical Model ◽  
Heart Rate ◽  
Rate Control ◽  
Heart Rate Control ◽  
Dynamic Relation ◽  
Chemical Events ◽  
Physical And Chemical ◽  
Frequency Of Stimulation ◽  
Heart Rate Control System ◽  
Stimulation Of

The effect on heart rate of stimulation of sympathetic and vagus efferent nerves to the heart has been described in a qualitative fashion by many investiga tors. However, except for the work of Rosenblueth and Simeone1 in 1934, no attempt has been made to analyze in a quantitative way the dynamic relation ship between heart rate and frequency of stimulation of these nerves. The present study was undertaken with the hope that such an analysis might yield useful information regarding a) the nature of the physical and chemical events involved in this transformation and b) the dynamic and steady-state parameters of this link of the heart rate control system.

scholarly journals Autonomic Heart Rate Control at Rest and During Unloading of the Right Ventricle in Repaired Tetralogy of Fallot in Adolescents

2008 ◽  
Vol 102 (8) ◽  
pp. 1085-1089 ◽  
Author(s):  
Vegard Bruun Wyller ◽  
J. Philip Saul ◽  
Riccardo Barbieri ◽  
Charlotte de Lange ◽  
Einar Hopp ◽  
...  
Keyword(s):  
Heart Rate ◽  
Right Ventricle ◽  
Tetralogy Of Fallot ◽  
Rate Control ◽  
Heart Rate Control ◽  
Repaired Tetralogy Of Fallot ◽  
The Right

scholarly journals Myocardial biomechanics, intracardiac hemodynamics and endothelial function in patients before and after various types of pacemakers implantation

2019 ◽  
Vol 10 (2) ◽  
pp. 56-63
Author(s):  
Viktoriia A. Sanakoyeva ◽  
Maksim S. Rybachenko ◽  
Alena A. Pukhayeva ◽  
Aleksandr G. Avtandilov
Keyword(s):  
Endothelial Function ◽  
Right Ventricle ◽  
Acute Hypoxia ◽  
Small Sample ◽  
Lv Function ◽  
Dual Chamber ◽  
Dual Chamber Pacemaker ◽  
Ventricular Stimulation ◽  
The Right ◽  
Stimulation Of

This review presents 31 sources from 1995 to 2019. Atrioventricular blockades (AVB) 2-3 degrees occupy a special place among the causes of death from cardiovascular disease. The above AVB lead to a significant slowing of the heart rate and predispose to the development and progression of heart failure (HF) and the occurrence of acute hypoxia of the brain and attacks Morgagni-Adams-Stokes. The main method of treatment of hemodynamically significant AB-conduction disorders is electrocardiostimulation (ES), which is the basic method of treatment. A single chamber pacemaker is the most often implanted with using isolated ventricular stimulation in clinical practice in the Russian Federation. Implantation of a dual chamber pacemaker is less frequent. This type of stimulation allows to maintain atrioventricular synchronization constantly. Stimulation of the apex of the right ventricle leads to a decrease in left ventricle (LV) function and structural changes that are a consequence of the occurrence of electric and mechanical dyssynchrony of the myocardium. There is a large number of works devoted to the comparison of different methods of ES leading to the conclusion that a powerful alternative to the stimulation of the apex of the right ventricle can be a dual ventricular stimulation. It is noted that implantation of single-and dual-chamber pacemaker with fixation of the electrode in the region of the right ventricle apex leads to the fact that both modes of stimulation can not cancel the electrical and anatomical remodeling of the myocardium of left atrium and LV. It may be necessary to use a more physiological site of stimulation with using optimal AB-delay to minimize the frequency of ventricular stimulation. Endothelium plays an important and independent role in the development of cardiovascular diseases. The effect of AB conduction impairment on endothelial function (EF) has not been described to date. There were few studies which are discussed the influence of constant pacemaker on endothelial function in patients with AVB 2-3 degrees in recent years. It should be noted that the studies were conducted on a small sample of patients and had a different design.

Changes of the heart rate control during pupil's examinations

2007 ◽  
Author(s):  
E. S. Gevorkyan ◽  
S. M. Minasyan ◽  
N. N. Ksadjikyan ◽  
A. V. Dayan ◽  
TsI Adamyan
Keyword(s):  
Heart Rate ◽  
Rate Control ◽  
Heart Rate Control

Complex Heart Rate Control in Patients with Acute Coronary Syndrome

2017 ◽  
Vol 2 (6) ◽  
pp. 68-70
Author(s):  
S. Grechko ◽  
◽  
I. Trefanenko ◽  
O. Polishchuk ◽  
N. Turubarova-Leunova
Keyword(s):  
Heart Rate ◽  
Acute Coronary Syndrome ◽  
Rate Control ◽  
Heart Rate Control ◽  
Coronary Syndrome
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