ANALYSIS ALGORITHM OVERVIEW
... The rate between two adjacent QRS complexes is calculated in beats per minute, then six of the last eight consecutive QRS rates are averaged, and the two outliers are discarded. If the running heart rate average is greater than the programmed VF/VT Rate, then the rhythm is classified as Shockable. I ...
... The rate between two adjacent QRS complexes is calculated in beats per minute, then six of the last eight consecutive QRS rates are averaged, and the two outliers are discarded. If the running heart rate average is greater than the programmed VF/VT Rate, then the rhythm is classified as Shockable. I ...
Back
... When one the ectopic foci, located at or above the atrioventricular node, fails to discharge, usually due to infracted tissue, atrial contraction never occurs. When one of these foci fails to fire, a foci node within the ventricle will takeover, producing ventricular depolarization and repolarizatio ...
... When one the ectopic foci, located at or above the atrioventricular node, fails to discharge, usually due to infracted tissue, atrial contraction never occurs. When one of these foci fails to fire, a foci node within the ventricle will takeover, producing ventricular depolarization and repolarizatio ...
Comparison of Late Potentials for 24 Hours Between Brugada
... recorded. LPs were identified, and events occurred at night in these 11 patients. In contrast, the dynamic daily changes of LP parameters were not observed in any ARVC patient (Figure 2), whereas LPs were identified in most (91%) of the ARVC patients. Because LP parameters showed dynamic change in B ...
... recorded. LPs were identified, and events occurred at night in these 11 patients. In contrast, the dynamic daily changes of LP parameters were not observed in any ARVC patient (Figure 2), whereas LPs were identified in most (91%) of the ARVC patients. Because LP parameters showed dynamic change in B ...
Provocation of Ventricular Ectopy by Cheyne-Stokes
... were identified, and apneas and hypopneas were scored prior to scoring of the ECG by personnel blinded to the ECG signal. After the representative segments were chosen, ECG analysis was performed with scoring of each beat as being sinus, paced, or ventricular in origin. VPB were identified manually ...
... were identified, and apneas and hypopneas were scored prior to scoring of the ECG by personnel blinded to the ECG signal. After the representative segments were chosen, ECG analysis was performed with scoring of each beat as being sinus, paced, or ventricular in origin. VPB were identified manually ...
Delayed-enhancement cardiac MRI in the evaluation of
... the evaluation of cardiomyopathies Cardiomyopathies are a diverse group of disorders with etiologies ranging from ischemic to infiltrative. Clinical differentiation may be complex, but diagnosis is essential as complications include congestive heart failure and sudden death. Recent developments in c ...
... the evaluation of cardiomyopathies Cardiomyopathies are a diverse group of disorders with etiologies ranging from ischemic to infiltrative. Clinical differentiation may be complex, but diagnosis is essential as complications include congestive heart failure and sudden death. Recent developments in c ...
Cardiac Resynchronization Therapy in Non
... parameters) for clinical and echocardiographic improvement after CRT.27 However, the PROSPECT study had various technical limitations, including the lack of standardized data acquisition and analysis, as well as the use of varying echocardiographic equipment (different vendors) which may have affect ...
... parameters) for clinical and echocardiographic improvement after CRT.27 However, the PROSPECT study had various technical limitations, including the lack of standardized data acquisition and analysis, as well as the use of varying echocardiographic equipment (different vendors) which may have affect ...
Assessment of systolic and diastolic ventricular properties - AJP
... agents (e.g., acute -blockade, high-dose calcium channel blockers), Ees was shown to decrease, again with relatively little influence on Vo. Appropriate changes in Ees are also observed when heart rate is varied (the so called force-fre- ...
... agents (e.g., acute -blockade, high-dose calcium channel blockers), Ees was shown to decrease, again with relatively little influence on Vo. Appropriate changes in Ees are also observed when heart rate is varied (the so called force-fre- ...
Simulation Study of the Electrophysiological Mechanisms for Heart
... Heart failure (HF) is a clinical syndrome caused by the inability of the heart to supply blood to the tissues, and has a high variability in its etiology. The most frequent causes for HF failure are myocardial infarction, pressure overload, volume overload, viral myocarditis, toxic cardiomyopathy an ...
... Heart failure (HF) is a clinical syndrome caused by the inability of the heart to supply blood to the tissues, and has a high variability in its etiology. The most frequent causes for HF failure are myocardial infarction, pressure overload, volume overload, viral myocarditis, toxic cardiomyopathy an ...
Late ventricular geometry and performance changes of
... assumptions (9-11,13,16-22) that are questionable in complex geometric shapes of functional single ventricles. Initially, the modified Fontan procedure was performed directly (8), transforming a volume-loaded ventricle (pumping to both systemic and pulmonary circulations) to an unloaded one (23). Th ...
... assumptions (9-11,13,16-22) that are questionable in complex geometric shapes of functional single ventricles. Initially, the modified Fontan procedure was performed directly (8), transforming a volume-loaded ventricle (pumping to both systemic and pulmonary circulations) to an unloaded one (23). Th ...
as a PDF
... calculated. These values were then plotted against the angle of measurement in polar coordinates, resulting in an ellipse-like curve representing the size and shape of the “mean” intertrabecular space. This approach gives the same results as the original method (Cowin, 1986), in which the dissector ...
... calculated. These values were then plotted against the angle of measurement in polar coordinates, resulting in an ellipse-like curve representing the size and shape of the “mean” intertrabecular space. This approach gives the same results as the original method (Cowin, 1986), in which the dissector ...
Do clinically relevant transthoracic defibrillation energies cause
... Sufficiently strong defibrillation shocks will cause temporary or permanent damage to the heart. Weak defibrillation shocks do not cause any damage to the heart but also do not defibrillate. A relevant and practical question is what range of shock energies is most likely to defibrillate while not ca ...
... Sufficiently strong defibrillation shocks will cause temporary or permanent damage to the heart. Weak defibrillation shocks do not cause any damage to the heart but also do not defibrillate. A relevant and practical question is what range of shock energies is most likely to defibrillate while not ca ...
London Arrhythmia Program Academic Year in Review Sept 2014
... Western University; postgraduate training for Internal Medicine, Cardiology, and other subspecialty residents from Western University and other Universities; highly specialized arrhythmia training for aspiring cardiologists from all over the world; and continued medical education locally, nationally ...
... Western University; postgraduate training for Internal Medicine, Cardiology, and other subspecialty residents from Western University and other Universities; highly specialized arrhythmia training for aspiring cardiologists from all over the world; and continued medical education locally, nationally ...
Autonomic Blockade by Propranolol and Atropine to Study Intrinsic
... block autonomic influence on the resting HR in man. "Direct" cardiac effect of propranolol. In 10 patients undergoing cardiac catheterization, 0.04 mg/kg atropine and 0.2 mg/kg propranolol were given to inhibit autonomic activity. Then measurements of cardiac performance were made before and after i ...
... block autonomic influence on the resting HR in man. "Direct" cardiac effect of propranolol. In 10 patients undergoing cardiac catheterization, 0.04 mg/kg atropine and 0.2 mg/kg propranolol were given to inhibit autonomic activity. Then measurements of cardiac performance were made before and after i ...
The relationship between clinical stage, prognosis and myocardial
... which TL − BM in the septum were found to be a positive value (i.e., defects of [123I] BMIPP were more severe than those of [201Tl]) experienced no cardiac event, without exception. Fatty acid metabolism was considered to be damaged, although viable myocardium was preserved in these cases. Furthermo ...
... which TL − BM in the septum were found to be a positive value (i.e., defects of [123I] BMIPP were more severe than those of [201Tl]) experienced no cardiac event, without exception. Fatty acid metabolism was considered to be damaged, although viable myocardium was preserved in these cases. Furthermo ...
Arrhythmia/Electrophysiology
... online-only Data Supplement Movie II. In this case, successful termination occurred after the delivery of 5 far-field pulses of 1.63 V/cm at a cycle length of 40 ms. If the electric field strength was too low, an insufficient number of activation sites were recruited, and only partial entrainment oc ...
... online-only Data Supplement Movie II. In this case, successful termination occurred after the delivery of 5 far-field pulses of 1.63 V/cm at a cycle length of 40 ms. If the electric field strength was too low, an insufficient number of activation sites were recruited, and only partial entrainment oc ...
Task Force Report
... Left ventricular hypertrophy............................1338 Low QRS voltage.............................................1338 Ventricular repolarization....................................1338 QT prolongation: differential diagnosis ...........1339 Long QT syndrome.................................... ...
... Left ventricular hypertrophy............................1338 Low QRS voltage.............................................1338 Ventricular repolarization....................................1338 QT prolongation: differential diagnosis ...........1339 Long QT syndrome.................................... ...
Computational modeling of passive myocardium
... models, in combination with new imaging modalities and modern simulation tools, can provide greater insight into the complex pathways of cardiac disease, and thereby guiding the design of new successful treatment strategies. For almost a century, the heart was believed to be made up of bundles of mu ...
... models, in combination with new imaging modalities and modern simulation tools, can provide greater insight into the complex pathways of cardiac disease, and thereby guiding the design of new successful treatment strategies. For almost a century, the heart was believed to be made up of bundles of mu ...
Neonatal Electrocardiogram
... Left ventricular hypertrophy............................1338 Low QRS voltage.............................................1338 Ventricular repolarization....................................1338 QT prolongation: differential diagnosis ...........1339 Long QT syndrome.................................... ...
... Left ventricular hypertrophy............................1338 Low QRS voltage.............................................1338 Ventricular repolarization....................................1338 QT prolongation: differential diagnosis ...........1339 Long QT syndrome.................................... ...
Electrophysiological recognition of an atrio
... PR intervals and a delta wave preceding the R wave (Figure 1). The R wave transition between leads V1 - V6 can be delayed and large R waves seen in V1. A pattern resembling left bundle branch block can sometimes be seen due to the right ventricle being stimulated before the left, though this is a va ...
... PR intervals and a delta wave preceding the R wave (Figure 1). The R wave transition between leads V1 - V6 can be delayed and large R waves seen in V1. A pattern resembling left bundle branch block can sometimes be seen due to the right ventricle being stimulated before the left, though this is a va ...
review of the diagnosis and treatment of diastolic heart failure
... Becoming familiar with the guidelines can help or can assist health care providers ...
... Becoming familiar with the guidelines can help or can assist health care providers ...
File
... Non-ST Elevation Infarction Here’s an ECG of an evolving non-ST elevation MI: Note the ST depression and T-wave inversion in leads V2-V6. ...
... Non-ST Elevation Infarction Here’s an ECG of an evolving non-ST elevation MI: Note the ST depression and T-wave inversion in leads V2-V6. ...
Scoring Center: Scoring Cardiac Dysrhythmias - Part 2
... A key concept in cellular physiology is that in cyclical phenomena, if cells depolarize, then they must then repolarize to prepare for the next depolarization cycle. The T wave of the EKG complex represents repolarization of the ventricle. The waveform associated with repolarization of the atria is ...
... A key concept in cellular physiology is that in cyclical phenomena, if cells depolarize, then they must then repolarize to prepare for the next depolarization cycle. The T wave of the EKG complex represents repolarization of the ventricle. The waveform associated with repolarization of the atria is ...
Hypertrophic Cardiomyopathy in Children, Teenagers and Young
... noea.3 Calcium antagonists are given when anginal problems dominate the clinical picture, or when betablockers prove ineffective. Diuretics should be administered extremely frugally, since there is a risk of haemodynamic deregulation in those patients whose heart failure is due to diastolic dysfunct ...
... noea.3 Calcium antagonists are given when anginal problems dominate the clinical picture, or when betablockers prove ineffective. Diuretics should be administered extremely frugally, since there is a risk of haemodynamic deregulation in those patients whose heart failure is due to diastolic dysfunct ...
Assessment of left ventricular diastolic function in bronchial asthma
... significant increase in CK-MB not associated with ...
... significant increase in CK-MB not associated with ...
Left anterior fascicular VT
... narrow QRS, response to verapamil and presentation in young patients without structural heart disease. The presence of ventriculoatrial dissociation in the ECG or during the EPS may clarify the diagnosis. It must also be distinguished from other forms of VT with narrow QRS. This is the case of VT re ...
... narrow QRS, response to verapamil and presentation in young patients without structural heart disease. The presence of ventriculoatrial dissociation in the ECG or during the EPS may clarify the diagnosis. It must also be distinguished from other forms of VT with narrow QRS. This is the case of VT re ...
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.