Conductive System Of Heart - Rawal College Of Dentistry
... • A special characteristic of the A-V bundle is it’s inability, except in the abnormal states , of action potentials to travel backward from the ventricles to the atria. • This prevents re-entry of cardiac impulse by this route from the ventricles to the atria. • The atrial muscle is separated from ...
... • A special characteristic of the A-V bundle is it’s inability, except in the abnormal states , of action potentials to travel backward from the ventricles to the atria. • This prevents re-entry of cardiac impulse by this route from the ventricles to the atria. • The atrial muscle is separated from ...
Exploring Left Ventricular Isovolumic Shortening and Stretch
... increase in LV pressure before opening of the aortic valve. Recent studies (8) have illustrated the onset of subendocardial shortening within the period that was in the past referred to as electromechanical delay. Rather, the phase represents a period of electromechanical dispersion, where both a tr ...
... increase in LV pressure before opening of the aortic valve. Recent studies (8) have illustrated the onset of subendocardial shortening within the period that was in the past referred to as electromechanical delay. Rather, the phase represents a period of electromechanical dispersion, where both a tr ...
Corporate Medical Policy External Defibrillators
... systemic infection) is being clinically managed. Once treatment is completed, the permanent ICD should be implanted. For bridging after myocardial infarction (MI), the data confirm the decrease in sudden cardiac arrest for those patients considered high-risk for ventricular arrhythmias. These patien ...
... systemic infection) is being clinically managed. Once treatment is completed, the permanent ICD should be implanted. For bridging after myocardial infarction (MI), the data confirm the decrease in sudden cardiac arrest for those patients considered high-risk for ventricular arrhythmias. These patien ...
Cardiac function assessed by systolic time intervals
... I was 77-6 per cent (± 7-6) and for group II was There were 33 patients studied pre- and postopera- 58-i per cent (±9-3). These values were signifitively, consisting of 27 men and 6 women. The mean cantly different (P
... I was 77-6 per cent (± 7-6) and for group II was There were 33 patients studied pre- and postopera- 58-i per cent (±9-3). These values were signifitively, consisting of 27 men and 6 women. The mean cantly different (P
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... likely to contribute to morbidity and mortality in patients with heart disease due to myocardial infarction or systemic hypertension (He and Whelton 1999). Development of cardiomyocyte hypertrophy allows the heart to function better in condition of chronic hypertension. However, structural alteratio ...
... likely to contribute to morbidity and mortality in patients with heart disease due to myocardial infarction or systemic hypertension (He and Whelton 1999). Development of cardiomyocyte hypertrophy allows the heart to function better in condition of chronic hypertension. However, structural alteratio ...
Ventricular fibrillation - respiratorytherapyfiles.net
... Atrial fibrillation is often due to serious underlying medical conditions. It is not typically a medical emergency. Ventricular fibrillation occurs in the ventricles (lower chambers) of the heart; it is always a medical emergency. If left untreated, ventricular fibrillation (VF, or V-fib) can lead t ...
... Atrial fibrillation is often due to serious underlying medical conditions. It is not typically a medical emergency. Ventricular fibrillation occurs in the ventricles (lower chambers) of the heart; it is always a medical emergency. If left untreated, ventricular fibrillation (VF, or V-fib) can lead t ...
Influence of Patern and Degree of Left Ventricular Hypertrophy on
... [7] De Simone G, Palmieri V. Left ventricular hypertrophy in hypertension as a predictor of coronary events: relation to geometry [review]. Curr Opin Nephrol Hypertens ...
... [7] De Simone G, Palmieri V. Left ventricular hypertrophy in hypertension as a predictor of coronary events: relation to geometry [review]. Curr Opin Nephrol Hypertens ...
Single-Beat Noninvasive Imaging of Cardiac
... in the AV node). Therefore, the accessory pathway remained the only input for ventricular activation, whereas under baseline conditions there were 2 activation inputs for ventricular activation: 1) the accessory pathway, and 2) the AV node. The short half-life of adenosine (approximately 1.5 s) caus ...
... in the AV node). Therefore, the accessory pathway remained the only input for ventricular activation, whereas under baseline conditions there were 2 activation inputs for ventricular activation: 1) the accessory pathway, and 2) the AV node. The short half-life of adenosine (approximately 1.5 s) caus ...
The Atrial Fibrillation And Stroke Thromboprophylaxis in hEart
... Anthology of publication and presentations associated with this thesis ...................................... iv Peer reviewed publications related to this thesis ..................................................................... iv Conference presentations related to this thesis ................ ...
... Anthology of publication and presentations associated with this thesis ...................................... iv Peer reviewed publications related to this thesis ..................................................................... iv Conference presentations related to this thesis ................ ...
Cardiopulmonary Resuscitation: Current Status
... be re-established from the sinus node. The current delivered to the heart is determined by both the energy level chosen (J) and the transthoracic impedance present. For example, the use of bare paddles without a couplant (eg, gel, cream) results in very high transthoracic impedance; impedance can be ...
... be re-established from the sinus node. The current delivered to the heart is determined by both the energy level chosen (J) and the transthoracic impedance present. For example, the use of bare paddles without a couplant (eg, gel, cream) results in very high transthoracic impedance; impedance can be ...
myocarditis - WordPress.com
... malaise or pharyngitis, tonsillitis, or upper respiratory tract infection in viral myocarditis ...
... malaise or pharyngitis, tonsillitis, or upper respiratory tract infection in viral myocarditis ...
ABLACION POR RADIOFRECUENCIA DE LA
... • Although the information comes from observational studies, those with AF + left ventricular dysfunction present an improvement in ejection fraction • Currently, studies on heart failure and ventricular impairment are being developed to assess this phenomenon. ...
... • Although the information comes from observational studies, those with AF + left ventricular dysfunction present an improvement in ejection fraction • Currently, studies on heart failure and ventricular impairment are being developed to assess this phenomenon. ...
THE ROLE OF MAGNESIUM IN CARDIAC ARRHYTHMIAS
... in many enzymatic reactions, binding to a substrate or directly to an enzyme, thus altering its structure. Moreover, magnesium ions play a crucial role in the functioning of many ion channels, including cardiac Mg2+-sensitive K+ channels, which normally allow K+ to pass more readily inward than outw ...
... in many enzymatic reactions, binding to a substrate or directly to an enzyme, thus altering its structure. Moreover, magnesium ions play a crucial role in the functioning of many ion channels, including cardiac Mg2+-sensitive K+ channels, which normally allow K+ to pass more readily inward than outw ...
Developmental Changes in the Myocardial Architecture of the Chick
... ber of interconnecting segments, and radiated from the interventricular septum in a fan-like pattern. The intertrabecular spaces were considerably smaller than those of the left ventricle, and their shape was less oblong. This trabecular arrangement (Fig. 6) did not change qualitatively until stage ...
... ber of interconnecting segments, and radiated from the interventricular septum in a fan-like pattern. The intertrabecular spaces were considerably smaller than those of the left ventricle, and their shape was less oblong. This trabecular arrangement (Fig. 6) did not change qualitatively until stage ...
Mechanical Circulatory Support
... The purpose of this compendium is to provide a curriculum of core competencies in mechanical circulatory support. The ISHLT Academy provides a concise synopsis of clinical knowledge and associated essential professional skills to facilitate the mastery of all surgical and medical aspects involved in ...
... The purpose of this compendium is to provide a curriculum of core competencies in mechanical circulatory support. The ISHLT Academy provides a concise synopsis of clinical knowledge and associated essential professional skills to facilitate the mastery of all surgical and medical aspects involved in ...
Transoesophageal Echocardiography and Left Ventricular Function
... useful diagnostic information in the critical care arena is well described, many incidences of TOE use in this set up can be ascribed to lack of adequate surface images. In the intensive care unit TOE is simple, safe and effective in the management of critically ill patients and provides alternative ...
... useful diagnostic information in the critical care arena is well described, many incidences of TOE use in this set up can be ascribed to lack of adequate surface images. In the intensive care unit TOE is simple, safe and effective in the management of critically ill patients and provides alternative ...
Visualization of tissue velocity data from cardiac wall motion
... Objective: The spatial arrangement of myocardial fiber structure affects the mechanical and electrical properties of the heart. Therefore, information on the structure and dynamics of the orientation of the muscle fibers in the human heart might provide significant insight into principles of the mec ...
... Objective: The spatial arrangement of myocardial fiber structure affects the mechanical and electrical properties of the heart. Therefore, information on the structure and dynamics of the orientation of the muscle fibers in the human heart might provide significant insight into principles of the mec ...
(CRT-D) A - Grupo Akros
... • No difference in 2-year survival between CRT and CRT-D patients. • In patients with Class IV symptoms in whom resynchronization is inadequate to restore clinical stability, the presence of a ICD often complicates the impending transition to end-of-life care. Lindenfeld et al. Circulation 2007 ...
... • No difference in 2-year survival between CRT and CRT-D patients. • In patients with Class IV symptoms in whom resynchronization is inadequate to restore clinical stability, the presence of a ICD often complicates the impending transition to end-of-life care. Lindenfeld et al. Circulation 2007 ...
Phys Chapter 13 [4-20
... The shape of the QRS changes over time, usually following a premature beat, a pause, and then another beat with a long Q-T interval, which may trigger arrhythmias, tachycardia, and possible vfib When ventricle muscle fiber action potential is prolonged from delayed repolarization, a premature de ...
... The shape of the QRS changes over time, usually following a premature beat, a pause, and then another beat with a long Q-T interval, which may trigger arrhythmias, tachycardia, and possible vfib When ventricle muscle fiber action potential is prolonged from delayed repolarization, a premature de ...
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... -possible fusion beats -possible capture (Dressler) beats (normal QRS complex in a run of ventricular premature contractions) ventricular tachycardia may be serious because the rapid ventricular rate does not allow adequate filling time of the ventricles, thus cardiac output is decreased. ...
... -possible fusion beats -possible capture (Dressler) beats (normal QRS complex in a run of ventricular premature contractions) ventricular tachycardia may be serious because the rapid ventricular rate does not allow adequate filling time of the ventricles, thus cardiac output is decreased. ...
Continuous Flow Left ventricular Assist Device
... beats or less of their appearance in the right side of the heart is typically felt to represent the presence of an intracardiac shunt, most commonly a PFO. It is, however, important to remember that in patients with advanced heart failure and significantly elevated right-and left-sided atrial pressu ...
... beats or less of their appearance in the right side of the heart is typically felt to represent the presence of an intracardiac shunt, most commonly a PFO. It is, however, important to remember that in patients with advanced heart failure and significantly elevated right-and left-sided atrial pressu ...
Relative Efficiency of Depolarization and Re
... undoubtedly clarify many nebulous aspects of clinical electrocardiography and will improve present methods of teaching. Yet, with the exception of superiority in demonstrating subtle differences in the phase of •electrical events occurring in the heart, the method in its present state of development ...
... undoubtedly clarify many nebulous aspects of clinical electrocardiography and will improve present methods of teaching. Yet, with the exception of superiority in demonstrating subtle differences in the phase of •electrical events occurring in the heart, the method in its present state of development ...
Case Report Contained Left Ventricular Free Wall Rupture
... maneuvers are uniformly unsuccessful in these cases. In the subacute form, the presentation may evolve over hours, days, or even longer. This form usually presents mainly with pericardial effusion signs and symptoms and may present with dysrhythmias, syncope, prolonged or recurrent chest pain (someti ...
... maneuvers are uniformly unsuccessful in these cases. In the subacute form, the presentation may evolve over hours, days, or even longer. This form usually presents mainly with pericardial effusion signs and symptoms and may present with dysrhythmias, syncope, prolonged or recurrent chest pain (someti ...
Conduction disturbances after surgical
... et al., 1975; Subramanian, 1976) of complete right bundle-branch block. Similarly, our results show a significantly reduced incidence of complete right bundle-branch block with an atriotomy of 33-3 per cent, compared with 78-9 per cent with a ventriculotomy (P < 0O001). The incidence of left axis de ...
... et al., 1975; Subramanian, 1976) of complete right bundle-branch block. Similarly, our results show a significantly reduced incidence of complete right bundle-branch block with an atriotomy of 33-3 per cent, compared with 78-9 per cent with a ventriculotomy (P < 0O001). The incidence of left axis de ...
Ventricular fibrillation
Ventricular fibrillation (V-fib or VF) is a condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than contract properly. Ventricular fibrillation is the most commonly identified arrhythmia in cardiac arrest patients. While there is some activity, the lay person is usually unable to detect it by palpating (feeling) the major pulse points of the carotid and femoral arteries. Such an arrhythmia is only confirmed by electrocardiography. Ventricular fibrillation is a medical emergency that requires prompt Advanced Life Support interventions. If this arrhythmia continues for more than a few seconds, it will likely degenerate further into asystole (""flatline""). This condition results in cardiogenic shock and cessation of effective blood circulation. As a consequence, sudden cardiac death (SCD) will result in a matter of minutes. If the patient is not revived after a sufficient period (within roughly 5 minutes at room temperature), the patient could sustain irreversible brain damage and possibly become brain-dead, due to the effects of cerebral hypoxia. On the other hand, death often occurs if sinus rhythm is not restored within 90 seconds of the onset of VF, especially if it has degenerated further into asystole.