Faculty Opinions recommendation of Stress-induced cardiac stimulation and fever: common hypothalamic origins and brainstem mechanisms.

2006 ◽  
Author(s):  
William Blessing
Keyword(s):  
Cardiac Stimulation

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 Age independently predicts hemodynamic, but not arrhythmic STEMI-related complications. Data from a cohort study on 848 STEMI patients

2021 ◽  
Vol 10 (Supplement_1) ◽  
Author(s):  
RC Serban ◽  
L Hadadi ◽  
I Sus ◽  
EK Lakatos ◽  
Z Demjen ◽  
...  
Keyword(s):  
Heart Failure ◽  
Coronary Intervention ◽  
Hospital Death ◽  
High Risk Population ◽  
Time Interval ◽  
Killip Class ◽  
St Segment Elevation ◽  
Catheterization Laboratory ◽  
Cardiac Stimulation ◽  
Cardiac Catheterization Laboratory

Abstract Funding Acknowledgements Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Romanian Ministry of Education and Research, CNCS-UEFISCDI BACKGROUND Age is one of the most relevant prognostic factors in patients presenting with ST-segment elevation myocardial infarction (STEMI). However, it remains unknown whether this impaired prognosis is due to the occurrence of hemodynamic and/or arrhythmic STEMI-related complications. Understanding the mechanisms involved in STEMI-related complications with advancing age could significantly improve outcomes in this high-risk population. PURPOSE We aimed to investigate the contribution of advanced age to the occurrence of hemodynamic and arrhythmic complications in STEMI patients. METHODS A total of 848 consecutive patients treated by primary percutaneous coronary intervention for STEMI were evaluated. Heart failure, cardiogenic shock, asystole, inotropic and diuretic use, and kidney dysfunction were used as in-hospital markers of hemodynamic complications. Ventricular fibrillation, conduction disorders, cardiac stimulation, and antiarrhythmic drugs use were used as markers of arrhythmic complications. The relationship between age and the occurrence of hemodynamic and arrhythmic complications was evaluated. The contribution of age to in-hospital death was also assessed. RESULTS In-hospital death occurred in 50 (5.8%) patients; patients who deceased were significantly older than their non-deceased counterparts (70.9 ± 10.9 vs. 61.2 ± 11.8 years; p< 0.0001). There was no association between age and the occurrence of any of the evaluated arrhythmic complications (all p >0.05). However, patients who presented hemodynamic complications were significantly older than those who did not (all p< 0.05). Age >60 years was a significant predictor of hemodynamic complications (p< 0.0001) with 61.7% sensitivity and 60.4% specificity. The association between age and hemodynamic complications remained significant after correction for additional risk factors (i.e., hypertension, diabetes mellitus, pre-existing heart failure, Killip class on admission, symptom onset-to-cardiac catheterization laboratory time interval). CONCLUSIONS In the present study, age was identified as an independent predictor of STEMI-related hemodynamic, but not arrhythmic complications. These data indicate that whereas age does not seem to affect the occurrence of STEMI-related rhythm disorders, patients above the age of 60 should particularly benefit from closer follow-up and more intensive strategies to prevent life-threating hemodynamic complications.

scholarly journals Temporary transvenous endocardial pacing: method of endocardial electrode reposition in the right ventricular cavity of the heart

2016 ◽  
Vol 97 (3) ◽  
pp. 453-457
Author(s):  
A N Osmolovsky
Keyword(s):  
Myocardial Infarction ◽  
Right Ventricular ◽  
Heart Rhythm ◽  
Ventricular Cavity ◽  
Cardiac Stimulation ◽  
Artificial Pacemaker ◽  
Temporary Pacing ◽  
The Right ◽  
Electrical Impulses ◽  
Endocardial Electrode

Aim. To justify and develop method of endocardial electrode reposition in the right ventricular cavity of the heart in the spontaneous termination of temporary pacing in patients with recurrent myocardial infarction.Methods. A method of endocardial electrode reposition was used in 23 patients with myocardial infarction complicated by acute bradyarrhythmias. Written informed consent was obtained from all patients, and in the absence of contact with the patient, decision to insert temporary artificial pacemaker was made by medical consultation.Results. A method of endocardial electrode reposition that provides threading the electrode from the venous bed to the right ventricular cavity of the heart, cardiac stimulation by electrical impulses and creation the new contacts between electrode and right ventricular endocardium of the heart using the same electrode, both in the presence and in absence of the heart conduction and excitation function, was developed. At the same time, it excludes the electrode dislocation from the right ventricular cavity of the heart, provides the electrode fixation with endocardium, and at the same time allows to impose a stable artificial heart rhythm in the shortest time. During the spontaneous termination of the effective artificial pacemaker, endocardial electrodes reposition enabled to promptly regain the heart rhythm control in all 23 patients with acute bradyarrhythmia of infarction genesis.Conclusion. Effective and safe method of endocardial electrode reposition in the right ventricular cavity of the heart in the spontaneous termination of temporary pacing in patients with recurrent myocardial infarction was developed and introduced into clinical practice.

Results of Permanent Cardiac Stimulation Therapy

1975 ◽  
pp. 75-90
Author(s):  
L. Bette ◽  
P. Doenecke ◽  
G. Rettig ◽  
R. Flöthner
Keyword(s):  
Cardiac Stimulation

Congenital atrioventricular block: clinical presentation, clinical evaluation, and management

ESC CardioMed ◽  
2018 ◽  
pp. 1966-1968
Author(s):  
Drago Fabrizio ◽  
Battipaglia Irma
Keyword(s):  
Heart Disease ◽  
Atrioventricular Block ◽  
Pacemaker Implantation ◽  
Cardiac Conduction ◽  
Ventricular Rate ◽  
Postnatal Life ◽  
Av Block ◽  
Cardiac Stimulation ◽  
Immune Mediated ◽  
Congenital Atrioventricular Block

Congenital atrioventricular block (CAVB) is a cardiac conduction disorder that is diagnosed in utero, at birth, or within the first month of life. When it is diagnosed between the first month and the 18th year of life, it is defined as childhood atrioventricular (AV) block. CAVB may occur in association with concomitant congenital heart disease, or be isolated, in a structurally normal heart (e.g. immune-mediated, inherited, or idiopathic CAVB). The majority of isolated CAVB is an immune-mediated AV block, due to transplacental passage of maternal autoantibodies, damaging the fetal cardiac conduction system. Only in a third of infants with immune-mediated CAVB is a well-defined autoimmune disease known in the mother. During fetal life, fetal echocardiography still represents the gold standard for the diagnosis of CAVB. Two major negative prognostic markers are low ventricular rate and the appearance of foetal hydrops. As regards prognosis, a risk for heart failure, syncope, and sudden death is present both during fetal and postnatal life. Dilated cardiomyopathy represents another complication in CAVB history, with different possible aetiologies (right ventricular permanent pacing, reactivation of autoimmune myocarditis). The indications for pacemaker implantation in patients with CAVB are similar to those for acquired heart disease, with some special technical considerations due to young age (epicardial versus endocardial systems, pacing site, etc.). As a future perspective, leadless cardiac stimulation in children with CAVB may represent a definitive solution and an answer to many questions.

Cardiovascular Effects of Acutely Raised Intracranial Pressure

1956 ◽  
Vol 185 (3) ◽  
pp. 510-514 ◽  
Author(s):  
Faith K. Brown
Keyword(s):  
Intracranial Pressure ◽  
Pressor Response ◽  
Pressure Rise ◽  
Cardiovascular Effects ◽  
Dominant Factor ◽  
Raised Intracranial Pressure ◽  
Venous Tone ◽  
Cardiac Stimulation ◽  
Experimental Findings ◽  
Ultimate Nature

Cardiovascular effects of acute elevations of intracranial pressure were studied, with special reference to three questions: a) whether vasoconstriction or cardiac stimulation is primarily responsible for the pressor response to this stimulus; b) whether the ultimate nature of the stimulus is neurogenic or humoral; and c) whether or not changes in venous tone occur in response to ICP elevation. It is concluded from the experimental findings that vasoconstriction was the dominant factor in the response, that the reflex is primarily neurogenic, and that the venomotor system shows an active constriction which accompanies the arterial pressure rise.

Sintered Platinum for Cardiac Pacing

1981 ◽  
Vol 4 (5) ◽  
pp. 238-242 ◽  
Author(s):  
G.E. Freud ◽  
B. Chinaglia
Keyword(s):  
Pulse Generator ◽  
Safety Margin ◽  
Cardiac Pacing ◽  
Platinum Electrodes ◽  
Sintering Process ◽  
Animal Testing ◽  
Cardiac Stimulation ◽  
Voltage Doubler ◽  
Observation Period

Platinum electrodes for cardiac stimulation having a surface porosity in the range of 40 μm have been prepared with a sintering process. These electrodes showed excellent in vitro characteristics (low polarization and sensing impedance). Animal testing proved good tissue acceptance and clinical trials in 31 patients gave the following results: threshold at implant 0,375 μJ (SD: 0.174 μJ), chronic threshold 1.15 μJ (SD: 1.05 μJ). The longest observation period was 7 months and the mean observation period was 17.1 weeks. These results indicate that this type of electrode allows safe stimulation of the heart with low energy pulses; in particular a reliable safety margin could be obtained with pulses having the amplitude of the existing lithium batteries, avoiding the need for a voltage doubler. This would improve the battery utilization and the pulse generator longevity.

Applications of TVI Sensing in Cardiac Stimulation

2007 ◽  
pp. 317-323
Author(s):  
Eraldo Occhetta ◽  
Miriam Bortnik ◽  
Franco Di Gregorio ◽  
Alberto Barbetta ◽  
Paolo Marino
Keyword(s):  
Cardiac Stimulation
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