Physics of Cardiac Arrhythmogenesis
... a mathematical framework to describe this propagation. Similar mechanisms govern electrical excitation in heart tissue, and extensions of the HH equations have been developed over the years to incorporate a growing amount of cardiac electrophysiological data (23–28). Pedagogical expositions of the H ...
... a mathematical framework to describe this propagation. Similar mechanisms govern electrical excitation in heart tissue, and extensions of the HH equations have been developed over the years to incorporate a growing amount of cardiac electrophysiological data (23–28). Pedagogical expositions of the H ...
Role of catheter-induced mechanical trauma in localization of target
... until an atrial activation earlier than the one recorded by the reference catheter could not be found. For left-sided atrial foci we performed point-to-point exploration of the atrium with only one catheter, looking for the longest AP interval. Pace mapping. In this technique, once any early atrial ...
... until an atrial activation earlier than the one recorded by the reference catheter could not be found. For left-sided atrial foci we performed point-to-point exploration of the atrium with only one catheter, looking for the longest AP interval. Pace mapping. In this technique, once any early atrial ...
ppt - Cardiovascular Division Heart Rate Variability Laboratory
... fast Fourier transform (FFT). ...
... fast Fourier transform (FFT). ...
syncope: diagnosis and treatment – marc kraus
... The definition of neurally mediated syncope (NMS) is: The development of arterial vasodilatation in the setting of relative or absolute bradycardia. Usually, bradycardia is expected with cardiogenic syncope. However, vasodepressor syncope (ie carotid-sinus hypersensitivity) is defined as a pure vaso ...
... The definition of neurally mediated syncope (NMS) is: The development of arterial vasodilatation in the setting of relative or absolute bradycardia. Usually, bradycardia is expected with cardiogenic syncope. However, vasodepressor syncope (ie carotid-sinus hypersensitivity) is defined as a pure vaso ...
Histologic evaluation of the atrioventricular nodal artery in healthy
... cases can result in complete a-v block. Atrioventricular nodal artery located within the nodal-perinodal tissue can probably be damaged during the ablation procedures. Therefore, we decided to explore in detail the morphology and the topography of the atrioventricular nodal artery in healthy humans ...
... cases can result in complete a-v block. Atrioventricular nodal artery located within the nodal-perinodal tissue can probably be damaged during the ablation procedures. Therefore, we decided to explore in detail the morphology and the topography of the atrioventricular nodal artery in healthy humans ...
Expert Consensus Statement
... to diagnose, and there is no easy way to assess disease activity or severity.6 Although CS is a known inflammatory disease and despite 450 years of the use of corticosteroids for treatment, there is no proof of survival benefit from this treatment.7 There are also conflicting data on the efficacy of cor ...
... to diagnose, and there is no easy way to assess disease activity or severity.6 Although CS is a known inflammatory disease and despite 450 years of the use of corticosteroids for treatment, there is no proof of survival benefit from this treatment.7 There are also conflicting data on the efficacy of cor ...
HRS Expert Consensus Statement on the Diagnosis
... to diagnose, and there is no easy way to assess disease activity or severity.6 Although CS is a known inflammatory disease and despite 450 years of the use of corticosteroids for treatment, there is no proof of survival benefit from this treatment.7 There are also conflicting data on the efficacy of cor ...
... to diagnose, and there is no easy way to assess disease activity or severity.6 Although CS is a known inflammatory disease and despite 450 years of the use of corticosteroids for treatment, there is no proof of survival benefit from this treatment.7 There are also conflicting data on the efficacy of cor ...
Electrophysiology Circulation: Arrhythmia &
... Low atrial fibrillatory rate is associated with poor outcome in patients with mild to moderate ...
... Low atrial fibrillatory rate is associated with poor outcome in patients with mild to moderate ...
Effects of a Left Ventricular Assist Device with a Centrifugal Pump on
... Patients requiring a heart transplant due to end-stage heart failure have increased year by year, and donor shortages have become a serious problem.13,14) Due to donor shortage, the mean waiting time for heart transplantation has been prolonged.14) Thus, the role of long-term mechanical circulatory ...
... Patients requiring a heart transplant due to end-stage heart failure have increased year by year, and donor shortages have become a serious problem.13,14) Due to donor shortage, the mean waiting time for heart transplantation has been prolonged.14) Thus, the role of long-term mechanical circulatory ...
EXPERIMENTAL & CLINICAL CARDIOLOGY
... All our presented cases have diagnosed left ventricular hypertrophy by echocardiography. Recently, an algorithm has been proposed in order to detect conditions with increased risk for sudden cardiac death [9]. The initial step is detailed history with focus on palpitations, chest pain, dyspnoe and s ...
... All our presented cases have diagnosed left ventricular hypertrophy by echocardiography. Recently, an algorithm has been proposed in order to detect conditions with increased risk for sudden cardiac death [9]. The initial step is detailed history with focus on palpitations, chest pain, dyspnoe and s ...
Comparison of Contractile Performance of Canine Atrial and
... than can ventricular muscle before optimum length is reached. At any given initial muscle length, the maximum of tension rise for atrial trabeculae amounted to at least twice that for ventricular trabeculae. At any given load up to 1.5 g/mm2, the maximum velocity of shortening of an atrial trabecula ...
... than can ventricular muscle before optimum length is reached. At any given initial muscle length, the maximum of tension rise for atrial trabeculae amounted to at least twice that for ventricular trabeculae. At any given load up to 1.5 g/mm2, the maximum velocity of shortening of an atrial trabecula ...
Population-based study of congenital heart defects in Down syndrome
... records available for review. Congenital heart disease was present in 100 cases (44%), and absent in 127 cases (56%). For those with CHD, all diagnoses were made by echocardiogram, cardiac catheterization, surgery, or autopsy. Eighty percent of those without CHD were evaluated by echocardiography, b ...
... records available for review. Congenital heart disease was present in 100 cases (44%), and absent in 127 cases (56%). For those with CHD, all diagnoses were made by echocardiogram, cardiac catheterization, surgery, or autopsy. Eighty percent of those without CHD were evaluated by echocardiography, b ...
Intraoperative Recording of Specialized Atrioventricular Conduction
... Two patients had double outlet right ventricle with ventricular septal defect and pulmonary artery band, and one patient each had Ebstein's anomaly and single atrium with AV canal defect. Results In 39 of the 47 patients studied, specialized atrial ventricular conduction tissue was identified by the ...
... Two patients had double outlet right ventricle with ventricular septal defect and pulmonary artery band, and one patient each had Ebstein's anomaly and single atrium with AV canal defect. Results In 39 of the 47 patients studied, specialized atrial ventricular conduction tissue was identified by the ...
COMPUTATIONAL MECHANICS TOWARDS IMPROVED UNDERSTANDING OF THE BIOMECHANICS OF
... interconnected by contiguous cytoplasmic bridges. This means the electrical stimulation spreads from one cell to the neighbouring cells. Some of the cardiac tissue is self excitable, contracting without any connection from the nervous system; the rhythm is even in the cell itself. The sinoatrial nod ...
... interconnected by contiguous cytoplasmic bridges. This means the electrical stimulation spreads from one cell to the neighbouring cells. Some of the cardiac tissue is self excitable, contracting without any connection from the nervous system; the rhythm is even in the cell itself. The sinoatrial nod ...
Pacemakers and ICDs-2012 - UCSF Department of Anesthesia and
... indications for electrical treatment of cardiac rhythm abnormalities, and more widespread deployment of automated external defibrillators (AEDs) in non-medical location. As anesthesia providers, we are expected to have basic knowledge of these advances, and we should know how to use AEDs and defibri ...
... indications for electrical treatment of cardiac rhythm abnormalities, and more widespread deployment of automated external defibrillators (AEDs) in non-medical location. As anesthesia providers, we are expected to have basic knowledge of these advances, and we should know how to use AEDs and defibri ...
Simultaneous Longitudinal Strain in All 4 Cardiac Chambers
... measurements of myocardial deformation indices, such as strain and strain rate. Over the past decade, a multitude of studies have reported myocardial deformation measurements in a variety of disease states, advancing our knowledge of cardiac physiology and improving prediction of clinical outcomes.1 ...
... measurements of myocardial deformation indices, such as strain and strain rate. Over the past decade, a multitude of studies have reported myocardial deformation measurements in a variety of disease states, advancing our knowledge of cardiac physiology and improving prediction of clinical outcomes.1 ...
Lead I
... If a different paper speed is used, calculations will have to be modified appropriately. Calculate atrial and ventricular rates separately if they are different (e.g. complete heart block). There are multiple methods to estimate the rate: For regular rhythms: Rate = 300 / number of large squares in ...
... If a different paper speed is used, calculations will have to be modified appropriately. Calculate atrial and ventricular rates separately if they are different (e.g. complete heart block). There are multiple methods to estimate the rate: For regular rhythms: Rate = 300 / number of large squares in ...
The Heart - health science academy
... • The volume of blood pumped by the heart per minute • Calculation of cardiac output – Stroke volume (SV): The volume of blood pumped by the heart per heartbeat ...
... • The volume of blood pumped by the heart per minute • Calculation of cardiac output – Stroke volume (SV): The volume of blood pumped by the heart per heartbeat ...
Cardiac Motion Analysis to Improve Pacing Site Selection in CRT1
... Rationale and Objectives: The aim of the study is to build cardiac wall motion models to characterize mechanical dyssynchrony and predict pacing sites for the left ventricle of the heart in cardiac resynchronization therapy (CRT). Materials and Methods: Cardiac magnetic resonance imaging data from 2 ...
... Rationale and Objectives: The aim of the study is to build cardiac wall motion models to characterize mechanical dyssynchrony and predict pacing sites for the left ventricle of the heart in cardiac resynchronization therapy (CRT). Materials and Methods: Cardiac magnetic resonance imaging data from 2 ...
short communication heart rate and gas exchange in freely diving
... entrance to the confined space during hide-search dives. The occurrence of expiration may provide a mechanism by which the cardiac response can be controlled during different types of dives. Whether the fear bradycardia described above is associated with hypoventilation or apnoea is not known. The r ...
... entrance to the confined space during hide-search dives. The occurrence of expiration may provide a mechanism by which the cardiac response can be controlled during different types of dives. Whether the fear bradycardia described above is associated with hypoventilation or apnoea is not known. The r ...
Regional cardiac sympathetic denervation in patients with
... consent, absence of coronary artery disease as detected by cardiac catheterization, echocardiography or exercise testing alone or in combination . Exclusion criteria included receiving medications known to interfere with 1-123-MIBG uptake, such as calcium channel blocking agents, betaagonist drugs o ...
... consent, absence of coronary artery disease as detected by cardiac catheterization, echocardiography or exercise testing alone or in combination . Exclusion criteria included receiving medications known to interfere with 1-123-MIBG uptake, such as calcium channel blocking agents, betaagonist drugs o ...
Experimental Auricular Flutter
... long axis so that the heart fell towards the left side. Small steel electrodes were clipped to the auricle for purposes of stimulating and recording electrograms. The auricular electrogram and electrocardiogram were recorded simultaneously on a multichannel Grass ink-writing oscillograph. In a numbe ...
... long axis so that the heart fell towards the left side. Small steel electrodes were clipped to the auricle for purposes of stimulating and recording electrograms. The auricular electrogram and electrocardiogram were recorded simultaneously on a multichannel Grass ink-writing oscillograph. In a numbe ...
Antiarrhythmic Drugs Munir Gharaibeh MD, PhD, MHPE Faculty of
... Munir Gharaibeh MD, PhD, MHPE Faculty of Medicine, The University of Jordan ...
... Munir Gharaibeh MD, PhD, MHPE Faculty of Medicine, The University of Jordan ...
McSharry P.E., Clifford G.D., Tarassenko L., Smith L.
... is sufficient. For ECGs with noise and artefacts it may be necessary to use more complicated methods [2], [3]. A comparison between the continuous process with power spectrum given by (3) and the piecewise constant reconstruction of the RR-process obtained from the R-peak detection (Fig. 7) illustra ...
... is sufficient. For ECGs with noise and artefacts it may be necessary to use more complicated methods [2], [3]. A comparison between the continuous process with power spectrum given by (3) and the piecewise constant reconstruction of the RR-process obtained from the R-peak detection (Fig. 7) illustra ...
Relationship between electrolytes and heart rate variability
... documented to be closely related to VA in ESRD. The most important three factors for cardiac arrhythmias genesis are modulating factor, arrhythmia triggers, and substrate (4-6). The modulating factors can be detected by the HRV for the evaluation of autonomic function. Whereas, signal-averaged elect ...
... documented to be closely related to VA in ESRD. The most important three factors for cardiac arrhythmias genesis are modulating factor, arrhythmia triggers, and substrate (4-6). The modulating factors can be detected by the HRV for the evaluation of autonomic function. Whereas, signal-averaged elect ...