PPT
... Phase 0 – Rapid or upstroke depolarization with an influx of sodium ions into the cell Phase 1 – Early rapid repolarization with transient onward movement of ...
... Phase 0 – Rapid or upstroke depolarization with an influx of sodium ions into the cell Phase 1 – Early rapid repolarization with transient onward movement of ...
Aldosterone, ion channels, and sudden death: another - AJP
... inactivates; the mutant channels thereby generate a persistent inward depolarizing Na⫹ current during the action potential plateau phase, especially at slow heart rates, which forms the substrate for arrhythmia-triggering early afterdepolarizations in LQTS3 (8). For several arrhythmogenic disorders ...
... inactivates; the mutant channels thereby generate a persistent inward depolarizing Na⫹ current during the action potential plateau phase, especially at slow heart rates, which forms the substrate for arrhythmia-triggering early afterdepolarizations in LQTS3 (8). For several arrhythmogenic disorders ...
Ejection Fraction and Segmental Wall Motion
... a variable portion of segment number 8 also affected the correlation. There is good general correlation throughout the entire range of segmental wall motion: from - 1% to + 62% contractility with areas of dyskinesis being represented as well as areas of hyperkinesis. Reproducibility ...
... a variable portion of segment number 8 also affected the correlation. There is good general correlation throughout the entire range of segmental wall motion: from - 1% to + 62% contractility with areas of dyskinesis being represented as well as areas of hyperkinesis. Reproducibility ...
Ventricular interdependence analysis in patients with congenital
... Toro R et al compared 28 patients with congenital right-to-left shunts against 28 healthy individuals measuring IMF, strain and strain rate of each ventricle before and after stress test and found differences on LV decreases in function, which were found to significantly correlate (r = -0.69, p < ...
... Toro R et al compared 28 patients with congenital right-to-left shunts against 28 healthy individuals measuring IMF, strain and strain rate of each ventricle before and after stress test and found differences on LV decreases in function, which were found to significantly correlate (r = -0.69, p < ...
Radiofrequency ablation of premature ventricular contractions
... discern because of their anatomic vicinity, in particular if arising from the right ventricular outflow tract, aortic sinus cusps, and aortomitral continuity (AMC).1–3 A new approach to accurately diagnose ventricular arrhythmias based on noninvasive electrocardiographic imaging was recently introduc ...
... discern because of their anatomic vicinity, in particular if arising from the right ventricular outflow tract, aortic sinus cusps, and aortomitral continuity (AMC).1–3 A new approach to accurately diagnose ventricular arrhythmias based on noninvasive electrocardiographic imaging was recently introduc ...
2. CARDIAC CYCLE
... two phases, the atrium in diastole has been filling with blood on top of the closed AV valve, causing atrial pressure to rise gradually (yellow). The "v" wave is due to the back flow of blood after it hits the closed AV valve. It is the second discernible wave of the jugular venous pulse. The pressu ...
... two phases, the atrium in diastole has been filling with blood on top of the closed AV valve, causing atrial pressure to rise gradually (yellow). The "v" wave is due to the back flow of blood after it hits the closed AV valve. It is the second discernible wave of the jugular venous pulse. The pressu ...
2. CARDIAC CYCLE - badripaudel.com
... two phases, the atrium in diastole has been filling with blood on top of the closed AV valve, causing atrial pressure to rise gradually (yellow). The "v" wave is due to the back flow of blood after it hits the closed AV valve. It is the second discernible wave of the jugular venous pulse. The pressu ...
... two phases, the atrium in diastole has been filling with blood on top of the closed AV valve, causing atrial pressure to rise gradually (yellow). The "v" wave is due to the back flow of blood after it hits the closed AV valve. It is the second discernible wave of the jugular venous pulse. The pressu ...
electrocardiographic diagnosis of left ventricular hypertrophy
... Fifty patients of either sex between the ages of 13 – 65 years who were provisionally diagnosed by the cardiologist on the basis of clinical signs and symptoms, for LVH were included in the study. Obese, smokers, and patients with physical abnormalities of chest wall such as kyphosis or scoliosis we ...
... Fifty patients of either sex between the ages of 13 – 65 years who were provisionally diagnosed by the cardiologist on the basis of clinical signs and symptoms, for LVH were included in the study. Obese, smokers, and patients with physical abnormalities of chest wall such as kyphosis or scoliosis we ...
Digoxin Toxicity
... block. Concurrent increased automaticity and vagal tone demonstrated by atrial tachycardia with atrioventricular block is also highly characteristic of toxicity notwithstanding therapeutic drug levels. Although older literature suggest that patients with moderate to severe left ventricular dysfuncti ...
... block. Concurrent increased automaticity and vagal tone demonstrated by atrial tachycardia with atrioventricular block is also highly characteristic of toxicity notwithstanding therapeutic drug levels. Although older literature suggest that patients with moderate to severe left ventricular dysfuncti ...
Advanced Systolic Function - Society of Cardiovascular
... The normal left ventricle is a muscular organ of nearly uniform wall thickness surrounding a cavity with a circular cross section. The cross sectional area of the left ventricular cavity is greatest at the base and decreases toward the apex. Contraction of myocardial fibers during systole causes an ...
... The normal left ventricle is a muscular organ of nearly uniform wall thickness surrounding a cavity with a circular cross section. The cross sectional area of the left ventricular cavity is greatest at the base and decreases toward the apex. Contraction of myocardial fibers during systole causes an ...
Unveiling the transcriptional control of the developing cardiac
... DNA binding capabilities, these data give novel insights about the transcriptional mechanisms governing the development of the CCS. Interestingly, Hoogaars/Tessari et al. [16] provide convincing evidence of a putative mechanism by which the cardiac conduction system might escape from a working myoca ...
... DNA binding capabilities, these data give novel insights about the transcriptional mechanisms governing the development of the CCS. Interestingly, Hoogaars/Tessari et al. [16] provide convincing evidence of a putative mechanism by which the cardiac conduction system might escape from a working myoca ...
A5 Ventricular Arrhythmia
... ★ Results: ICD therapy was the best in reducing mortality rate, and there was no difference between amiodarone and placebo. • The ICD therapy is the best modality to prevent sudden cardiac death and ventricular arrhythmias. However, to suppress arrhythmias so the patient does not get shocked we can ...
... ★ Results: ICD therapy was the best in reducing mortality rate, and there was no difference between amiodarone and placebo. • The ICD therapy is the best modality to prevent sudden cardiac death and ventricular arrhythmias. However, to suppress arrhythmias so the patient does not get shocked we can ...
On Measuring the Absolute Ventricular Volumes for the Estimation of
... developed (1-6). ESPVR is a valuable tool; it designates a maximal elastance (maximal pressure/volume ratio). A traditional way to estimate ESPVR is to alter the heart load and use multiple cardiac cycles (Figure 1). Inducing such a transitional status is time consuming and increases the risk of hea ...
... developed (1-6). ESPVR is a valuable tool; it designates a maximal elastance (maximal pressure/volume ratio). A traditional way to estimate ESPVR is to alter the heart load and use multiple cardiac cycles (Figure 1). Inducing such a transitional status is time consuming and increases the risk of hea ...
Navigational error in the heart leads to premature ventricular excitation
... In the normal heart, an insulating barrier separates the atria and ventricles. The only way in which electrical impulses can cross this barrier is via the atrioventricular (AV) node, which delays impulse conduction to ensure the forward flow of the blood. However, in some individuals, additional mus ...
... In the normal heart, an insulating barrier separates the atria and ventricles. The only way in which electrical impulses can cross this barrier is via the atrioventricular (AV) node, which delays impulse conduction to ensure the forward flow of the blood. However, in some individuals, additional mus ...
Document
... The Arrhythmia and ACLS Councils of the Irish Heart Foundation collaborated to produce these algorithms (1). They are designed to provide a simple and safe approach to the acute management of heart rhythm problems. They are directed at junior doctors who may have to deal with these at times complex ...
... The Arrhythmia and ACLS Councils of the Irish Heart Foundation collaborated to produce these algorithms (1). They are designed to provide a simple and safe approach to the acute management of heart rhythm problems. They are directed at junior doctors who may have to deal with these at times complex ...
L. Környei
... • Ten years ago before genotyping was mainstream, most patients were diagnosed as a result of an event • With the introduction of genetic testing and cascade familial testing, there are a lot more patients being identified with LQTS, without any event • the chance of a patient without symptoms pr ...
... • Ten years ago before genotyping was mainstream, most patients were diagnosed as a result of an event • With the introduction of genetic testing and cascade familial testing, there are a lot more patients being identified with LQTS, without any event • the chance of a patient without symptoms pr ...
Pacemakers - 123seminarsonly.com
... Sick sinus syndrome in the absence of AV node disease or atrial fibrillation. ...
... Sick sinus syndrome in the absence of AV node disease or atrial fibrillation. ...
Lead I
... • Normal duration = 0.08-0.12 seconds • Its duration, amplitude, and morphology are useful in diagnosing cardiac arrhythmias, ventricular hypertrophy, MI, electrolyte derangement, etc. • Q wave greater than 1/3 the height of the R wave, greater than 0.04 sec are abnormal and may represent MI ...
... • Normal duration = 0.08-0.12 seconds • Its duration, amplitude, and morphology are useful in diagnosing cardiac arrhythmias, ventricular hypertrophy, MI, electrolyte derangement, etc. • Q wave greater than 1/3 the height of the R wave, greater than 0.04 sec are abnormal and may represent MI ...
Programmed Ventricular Stimulation - Indications and Limitations: A
... PVS in patients with idiopathic VF yields inconsistent inducibility (50-60%).37,38 A “loss-of-function” or mutation in SCN5A genes is common in patients with idiopathic VF (and in some patients with early repolarisation syndrome) and this phenomenon predisposes to idiopathic VF.38 The value of PVS i ...
... PVS in patients with idiopathic VF yields inconsistent inducibility (50-60%).37,38 A “loss-of-function” or mutation in SCN5A genes is common in patients with idiopathic VF (and in some patients with early repolarisation syndrome) and this phenomenon predisposes to idiopathic VF.38 The value of PVS i ...
A1983QJ71400001
... were irrelevant in the classical conception of upper, middle, and lower nodal rhythms with initial an4 final common pathways, so that people working in this field were not paying enough attention to their variations. Measuring the retrograde conduction times during the capture phenomenon helped us t ...
... were irrelevant in the classical conception of upper, middle, and lower nodal rhythms with initial an4 final common pathways, so that people working in this field were not paying enough attention to their variations. Measuring the retrograde conduction times during the capture phenomenon helped us t ...
Difference between the left and right ventricular
... Mandorla S, et al in their study on fetal heart by real-time-directed M-mode ultrasound from the 19th gestation week until term opined that left ventricular, right ventricular, left atrial and right atrial chamber size, interventricular septum thickness, right and left wall thickness, aortic and pul ...
... Mandorla S, et al in their study on fetal heart by real-time-directed M-mode ultrasound from the 19th gestation week until term opined that left ventricular, right ventricular, left atrial and right atrial chamber size, interventricular septum thickness, right and left wall thickness, aortic and pul ...
Use of indicative and reciprocal electrocardiographic changes to
... the back of the chest or the right side of the chest, and as a consequence, important information may go undetected (2, 3). The anterior chest leads (V1 through V3), however, are the reciprocals of leads on the back of the chest. Thus, early in posterior myocardial infarction when ST elevation and b ...
... the back of the chest or the right side of the chest, and as a consequence, important information may go undetected (2, 3). The anterior chest leads (V1 through V3), however, are the reciprocals of leads on the back of the chest. Thus, early in posterior myocardial infarction when ST elevation and b ...
H. Hutten -
... anatomical shape of the heart and its changes during contraction, the dimensions of the fibrotic capsule forming around the electrode during the process of ingrowing etc, there is increasing evidence that intramyocardial electrograms have a high potential for cardiac risk surveillance, e.g. for arrh ...
... anatomical shape of the heart and its changes during contraction, the dimensions of the fibrotic capsule forming around the electrode during the process of ingrowing etc, there is increasing evidence that intramyocardial electrograms have a high potential for cardiac risk surveillance, e.g. for arrh ...
CorePace #5 - Pacemaker Basics
... • Changes in a patient’s disease and/or medications may alter the efficacy of the device’s programmed parameters. Patients should avoid sources of magnetic and electromagnetic radiation to avoid possible underdetection, inappropriate sensing and/or therapy delivery, tissue damage, induction of an ar ...
... • Changes in a patient’s disease and/or medications may alter the efficacy of the device’s programmed parameters. Patients should avoid sources of magnetic and electromagnetic radiation to avoid possible underdetection, inappropriate sensing and/or therapy delivery, tissue damage, induction of an ar ...
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.