Intercapillary Distance and Capillary Reserve in
... WEARN et al.1-2 were the first to report that myocardial capillary circulation is compromised by the hypertrophy of disease. They concluded that neither the fibers nor the capillaries proliferate, and that the distance between capillaries increases because fiber diameter increases. This view has bee ...
... WEARN et al.1-2 were the first to report that myocardial capillary circulation is compromised by the hypertrophy of disease. They concluded that neither the fibers nor the capillaries proliferate, and that the distance between capillaries increases because fiber diameter increases. This view has bee ...
Digoxin Immune Fab (DigiFab®) Management of Digoxin Toxicity
... • Papain is used in the manufacturing process; trace amounts may still be present in the final product. Some dust mite and latex allergens share similar antigenic determinants with papain. Patients with an allergy to papain, chymopapain, other papaya extracts, or the pineapple enzyme, bromelain, may ...
... • Papain is used in the manufacturing process; trace amounts may still be present in the final product. Some dust mite and latex allergens share similar antigenic determinants with papain. Patients with an allergy to papain, chymopapain, other papaya extracts, or the pineapple enzyme, bromelain, may ...
QT interval variability in body surface ECG
... compressed ST-T segments of consecutive beats with a userdefined template, obtaining ST-T segment duration changes relative to the template duration.12 The QRS interval is assumed constant. Naturally, this is not always fully accurate as rate-dependent changes in activation sequence also exist. Vari ...
... compressed ST-T segments of consecutive beats with a userdefined template, obtaining ST-T segment duration changes relative to the template duration.12 The QRS interval is assumed constant. Naturally, this is not always fully accurate as rate-dependent changes in activation sequence also exist. Vari ...
Myocardial ischaemia and the cardiac nervous system
... cardiac neurones recorded using extracellular techniques increases when their associated ventricular sensory neurites are exposed to supramaximal mechanical (about 1225%) or chemical (about 1500%) stimuli [18]. The ventricular sensory neurites of these afferent neurones, whether they spontaneously g ...
... cardiac neurones recorded using extracellular techniques increases when their associated ventricular sensory neurites are exposed to supramaximal mechanical (about 1225%) or chemical (about 1500%) stimuli [18]. The ventricular sensory neurites of these afferent neurones, whether they spontaneously g ...
Cardiac Rhythms
... • usually between 0.36 and 0.44 second • varies greatly according to age, gender ,heart rate, and whether the patient is asleep • should be less than 1/2 the distance between two consecutive R waves (R-R interval) when the rhythm is regular Prolonged QT interval: Repolarization means that the muscle ...
... • usually between 0.36 and 0.44 second • varies greatly according to age, gender ,heart rate, and whether the patient is asleep • should be less than 1/2 the distance between two consecutive R waves (R-R interval) when the rhythm is regular Prolonged QT interval: Repolarization means that the muscle ...
CMR Imaging Assessing Viability in Patients With Chronic
... trial had to fulfill the following criteria: 1) prospective study involving patients with CAD in whom a) CMR was performed before revascularization (i.e., PCI or CABG) in order to assess viability, and b) any current standard evaluation technique for left ventricular regional and/or global function ...
... trial had to fulfill the following criteria: 1) prospective study involving patients with CAD in whom a) CMR was performed before revascularization (i.e., PCI or CABG) in order to assess viability, and b) any current standard evaluation technique for left ventricular regional and/or global function ...
PEDMEANS Physicians Manual
... typified, i.e., a comparison is performed that gives rise to classes of similar QRS complexes. Often there is only one type. If there are more, the “ordinary,” “representative” or “dominant” one is established; the others are “extraordinary” or “non-dominant”. Mostly, the number of dominant complexe ...
... typified, i.e., a comparison is performed that gives rise to classes of similar QRS complexes. Often there is only one type. If there are more, the “ordinary,” “representative” or “dominant” one is established; the others are “extraordinary” or “non-dominant”. Mostly, the number of dominant complexe ...
A modified version of
... repetitive sudden block of conduction of an impulse without prior significant lengthening of conduction time (<80 ms). ...
... repetitive sudden block of conduction of an impulse without prior significant lengthening of conduction time (<80 ms). ...
Correlation between echocardiographic endocardial
... motion can be superimposed in their correct spatial distribution. This endocardial mapping technique (EMT) provides a measure of the left ventricular endocardial surface area (ESA in cm2), the area of abnormal wall motion (AWM in cm2), and the overall percent dysfunction (%AWM) as a measure of the f ...
... motion can be superimposed in their correct spatial distribution. This endocardial mapping technique (EMT) provides a measure of the left ventricular endocardial surface area (ESA in cm2), the area of abnormal wall motion (AWM in cm2), and the overall percent dysfunction (%AWM) as a measure of the f ...
syncope: diagnosis and treatment – marc kraus
... longer term monitoring an implantable loop recorder can be utilized. Real-time auscultation (by the owner or veterinarian) during the episode of collapse is some times useful because it documents the associated rate as fast, slow or normal. Caution is advised with real time auscultation because with ...
... longer term monitoring an implantable loop recorder can be utilized. Real-time auscultation (by the owner or veterinarian) during the episode of collapse is some times useful because it documents the associated rate as fast, slow or normal. Caution is advised with real time auscultation because with ...
Materials and Methods - AJP
... In the normal heart, the spread of ventricular electrical activation occurs within approximately 40ms via conduction through the Purkinje network, and contraction occurs with similar synchrony. In hearts with an intraventricular conduction delay of a left bundle branch (LBB) pattern the electrical a ...
... In the normal heart, the spread of ventricular electrical activation occurs within approximately 40ms via conduction through the Purkinje network, and contraction occurs with similar synchrony. In hearts with an intraventricular conduction delay of a left bundle branch (LBB) pattern the electrical a ...
Role of trans-thoracic impedance and current for a successful
... The thesis examines the effect of transthoracic impedance (TTI) on the success rate of synchronized cardioversion, using retrospective analysis on clinical data and numerical model. Synchronized electrical cardioversion is a treatment that applies an electrical pulse to the cardiac tissue to restore ...
... The thesis examines the effect of transthoracic impedance (TTI) on the success rate of synchronized cardioversion, using retrospective analysis on clinical data and numerical model. Synchronized electrical cardioversion is a treatment that applies an electrical pulse to the cardiac tissue to restore ...
Chow Sample Chap 1
... through the AV node to the His-Purkinje system, and then to the ventricles. The His-Purkinje system comprises myocardial cells that are specialized for rapid conduction. Its anatomic components are (in order of activation) the His bundle, the bundle branches (right and left) and the Purkinje fibers. ...
... through the AV node to the His-Purkinje system, and then to the ventricles. The His-Purkinje system comprises myocardial cells that are specialized for rapid conduction. Its anatomic components are (in order of activation) the His bundle, the bundle branches (right and left) and the Purkinje fibers. ...
Left Ventricular Papillary Muscles
... The left ventricular papillary muscles appear to be the last portions of the heart to be perfused by coronary arterial blood. As a consequence they are sensitive anatomic markers of myocardial ischemia. Foci of necrosis or fibrosis therefore are commonly seen in these structures, particularly the po ...
... The left ventricular papillary muscles appear to be the last portions of the heart to be perfused by coronary arterial blood. As a consequence they are sensitive anatomic markers of myocardial ischemia. Foci of necrosis or fibrosis therefore are commonly seen in these structures, particularly the po ...
Recommendations for the Evaluation of Left Ventricular Diastolic
... for the maximum time for LV filling. This theoretically optimal situation is approached by the cyclic interaction of myofilaments and assumes competent mitral and aortic valves. Diastole starts at aortic valve closure and includes LV pressure fall, rapid filling, diastasis (at slower heart rates), a ...
... for the maximum time for LV filling. This theoretically optimal situation is approached by the cyclic interaction of myofilaments and assumes competent mitral and aortic valves. Diastole starts at aortic valve closure and includes LV pressure fall, rapid filling, diastasis (at slower heart rates), a ...
DATA SHEET LANOXIN
... LANOXIN therapy, it should be anticipated that optimum loading doses of LANOXIN will be less than those recommended above. The elderly:The tendency to impaired renal function and low lean body mass in the elderly influences the pharmacokinetics of LANOXIN such that high serum digoxin levels and asso ...
... LANOXIN therapy, it should be anticipated that optimum loading doses of LANOXIN will be less than those recommended above. The elderly:The tendency to impaired renal function and low lean body mass in the elderly influences the pharmacokinetics of LANOXIN such that high serum digoxin levels and asso ...
Depolarization wave and mechanics in the paced heart : model and
... Sometimes, normal depolarization wave propagation is disturbed, by for instance a block in the conduction system and by ventricular pacing. Abnormal ventricular depolarization patterns result in deterioration of pump function and can contribute to the development of heart failure. In the clinic, pac ...
... Sometimes, normal depolarization wave propagation is disturbed, by for instance a block in the conduction system and by ventricular pacing. Abnormal ventricular depolarization patterns result in deterioration of pump function and can contribute to the development of heart failure. In the clinic, pac ...
Catheter Ablation of Supraventricular and Ventricular Arrhythmias
... response to programmed electrical stimulation. Programmed electrical stimulation of the heart not only gives important information about the electrophysiologic properties of the atrioventricular (AV) node, the His-Purkinje system, the atria, and the ventricles, but also facilitates studying the mech ...
... response to programmed electrical stimulation. Programmed electrical stimulation of the heart not only gives important information about the electrophysiologic properties of the atrioventricular (AV) node, the His-Purkinje system, the atria, and the ventricles, but also facilitates studying the mech ...
Acute Effects of Right Ventricular Apical Pacing on Left Ventricular
... and twist, using 2D speckle-tracking strain imaging. Methods and Results—A group of 25 patients with structural normal hearts referred for electrophysiological study were studied. Two-dimensional echocardiography was performed at baseline and during RV apical pacing at the time of the electrophysiol ...
... and twist, using 2D speckle-tracking strain imaging. Methods and Results—A group of 25 patients with structural normal hearts referred for electrophysiological study were studied. Two-dimensional echocardiography was performed at baseline and during RV apical pacing at the time of the electrophysiol ...
Cardiac Rhythm Management Devices (Part II)
... within 48 h of device implantation, lead dislodgement, migration, and myocardial perforation are probable causes. Misdiagnosis of failure to pace may occur with impending battery depletion, evidenced by the “elective replacement indicator.” The elective replacement indicator rate is not necessarily ...
... within 48 h of device implantation, lead dislodgement, migration, and myocardial perforation are probable causes. Misdiagnosis of failure to pace may occur with impending battery depletion, evidenced by the “elective replacement indicator.” The elective replacement indicator rate is not necessarily ...
AHA/ACC/HR Guideline for the Management of Patients with Atrial
... in the production of guidelines in the area of cardiovascular disease since 1980. The ACC/AHA Task Force on Practice Guidelines (Task Force), whose charge is to develop, update, or revise practice guidelines for cardiovascular diseases and procedures, directs this effort. Writing committees are char ...
... in the production of guidelines in the area of cardiovascular disease since 1980. The ACC/AHA Task Force on Practice Guidelines (Task Force), whose charge is to develop, update, or revise practice guidelines for cardiovascular diseases and procedures, directs this effort. Writing committees are char ...
Aberrant Intracellular Calcium Cycling in the Heart
... Heart disease is the biggest killer world-wide, causing a quarter of all deaths. During the past two decades, it has also risen above infectious diseases as the leading cause of years of life lost. Heart failure, characterized by weak pump function of the heart, and disturbances in heart rhythm (arr ...
... Heart disease is the biggest killer world-wide, causing a quarter of all deaths. During the past two decades, it has also risen above infectious diseases as the leading cause of years of life lost. Heart failure, characterized by weak pump function of the heart, and disturbances in heart rhythm (arr ...
2014 ESC Guidelines on diagnosis and management
... systolic anterior motion sudden cardiac death septal alcohol ablation Subcutaneous lead implantable cardioverter defibrillator single photon emission computed tomography steady-state free precession supraventricular tachycardia transoesophageal echocardiography troponin I, cardiac muscle troponin T, ...
... systolic anterior motion sudden cardiac death septal alcohol ablation Subcutaneous lead implantable cardioverter defibrillator single photon emission computed tomography steady-state free precession supraventricular tachycardia transoesophageal echocardiography troponin I, cardiac muscle troponin T, ...
Experimental and theoretical ventricular electrograms - AJP
... Our simulations are based on the bidomain equations to account for both the intracellular and extracellular domains of this cardiac tissue. The functional coupling of these two domains is accomplished using nonlinear sets of equations that describe the transmembrane ionic currents, which are express ...
... Our simulations are based on the bidomain equations to account for both the intracellular and extracellular domains of this cardiac tissue. The functional coupling of these two domains is accomplished using nonlinear sets of equations that describe the transmembrane ionic currents, which are express ...
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.