Chapter 35 - Extras Springer
... perfusion imaging to routine echocardiographic assessment of RWMAs and clinical variables in patients with suspected cardiac chest pain and nondiagnostic electrocardiograms improved the prediction of cardiac events. The addition of perfusion imaging in patients with suspected cardiac chest pain and ...
... perfusion imaging to routine echocardiographic assessment of RWMAs and clinical variables in patients with suspected cardiac chest pain and nondiagnostic electrocardiograms improved the prediction of cardiac events. The addition of perfusion imaging in patients with suspected cardiac chest pain and ...
healthcare professionals should be able to recognise cardiac arrest
... Risks to the CPR provider and recipients of CPR Risks to the victim who receives CPR who is not in cardiac arrest Many CPR providers do not initiate CPR because they are concerned that delivering chest compressions to a victim who is not in cardiac arrest will cause serious complications. Three ...
... Risks to the CPR provider and recipients of CPR Risks to the victim who receives CPR who is not in cardiac arrest Many CPR providers do not initiate CPR because they are concerned that delivering chest compressions to a victim who is not in cardiac arrest will cause serious complications. Three ...
Atrioventricular Conduction
... in the conduction and/or formation of subsequent beats.1 The concept of concealed conduction can be applied to explain (1) post-extrasystolic prolongation of the P-R interval, (2) the irregularity of the ventricular response during atrial fibrillation, (3) the slower ventricular response during atri ...
... in the conduction and/or formation of subsequent beats.1 The concept of concealed conduction can be applied to explain (1) post-extrasystolic prolongation of the P-R interval, (2) the irregularity of the ventricular response during atrial fibrillation, (3) the slower ventricular response during atri ...
Gallop Rhythm of the Heart
... intensified when a previously silent phase of atrial contraction is superimposed upon it by an increased heart rate. The single ventricular gallop intensified by this mechanism is augmented both mechanically and acoustically, and is called augmented ventricular gallop. Similarly, an atrial gallop su ...
... intensified when a previously silent phase of atrial contraction is superimposed upon it by an increased heart rate. The single ventricular gallop intensified by this mechanism is augmented both mechanically and acoustically, and is called augmented ventricular gallop. Similarly, an atrial gallop su ...
Stochastic spontaneous calcium release events trigger
... Delayed afterdepolarization † Triggered activity † Computer-based model † Purkinje system † Arrhythmia ...
... Delayed afterdepolarization † Triggered activity † Computer-based model † Purkinje system † Arrhythmia ...
Myocardial infarction with Q waves
... myocardium is a shift of pH in the acidic side (acidosis), which contributes to further reduction in electrical activity and myocardial contractility. ATP deficiency leads to the discovery of potassium channel cell K + ions out into the extracellular medium, thus reducing the transmembrane resting p ...
... myocardium is a shift of pH in the acidic side (acidosis), which contributes to further reduction in electrical activity and myocardial contractility. ATP deficiency leads to the discovery of potassium channel cell K + ions out into the extracellular medium, thus reducing the transmembrane resting p ...
A Carbohydrate Fraction, AIP1, from Artemisia Iwayomogi Reduces
... dried A. iwayomogi herb using size-exclusion chromatography [10]. AIP1 has various biological functions. For example, the AIP1 fraction increased antibody production and suppressed transplanted tumor cell growth [10]. The AIP1 fraction may also be involved in the survival of immune cells, either by ...
... dried A. iwayomogi herb using size-exclusion chromatography [10]. AIP1 has various biological functions. For example, the AIP1 fraction increased antibody production and suppressed transplanted tumor cell growth [10]. The AIP1 fraction may also be involved in the survival of immune cells, either by ...
5 Precordial Pulsations
... torsional changes seen in the apical lateral walls. In addition, during the phase of isovolumic contraction, it has been shown that there is an increase in the external circumference of the left ventricle together with a decrease in the base-to-apex length (27). However, these changes during systole ...
... torsional changes seen in the apical lateral walls. In addition, during the phase of isovolumic contraction, it has been shown that there is an increase in the external circumference of the left ventricle together with a decrease in the base-to-apex length (27). However, these changes during systole ...
1 The New Definition of Early Repolarisation Peter W. Macfarlane
... can be used, perhaps with different thresholds. As readers will be aware, it is very common in electrocardiography to use a threshold such as 0.1mV because it represents the amplitude of one small square on ECG paper. If the precision of automated ECG measurement is to be utilised, then other thresh ...
... can be used, perhaps with different thresholds. As readers will be aware, it is very common in electrocardiography to use a threshold such as 0.1mV because it represents the amplitude of one small square on ECG paper. If the precision of automated ECG measurement is to be utilised, then other thresh ...
A review of spontaneous closure of ventricular septal defect
... been suggested that the association tends to close spontaneously. Beerman et al cautioned that AMS is clearly an inaccurate designation in most cases because morphologically it is not an “aneurysm” and its structure is not the membranous septum (17). Recently, it was found that children with spontan ...
... been suggested that the association tends to close spontaneously. Beerman et al cautioned that AMS is clearly an inaccurate designation in most cases because morphologically it is not an “aneurysm” and its structure is not the membranous septum (17). Recently, it was found that children with spontan ...
Sudden Cardiac Death in the Young
... acquired cardiomyopathies and arrhythmia syndromes (channelopathies), structural congenital heart diseases, myocarditis, and coronary abnormalities. In any given patient, these underlying diagnoses may be known, or they may be undiagnosed and presymptomatic. The proportion of detected versus undetec ...
... acquired cardiomyopathies and arrhythmia syndromes (channelopathies), structural congenital heart diseases, myocarditis, and coronary abnormalities. In any given patient, these underlying diagnoses may be known, or they may be undiagnosed and presymptomatic. The proportion of detected versus undetec ...
CLINICAL AND ECHOCARDIOGRAPHIC FINDINGS OF LEFT
... Hypertension is the commonest of the cardiovascular risk factors, whose prevalence in Tanzania is high between 20-30%, among rural and urban residents respectively. Uncontrolled hypertension leads to a number of structural changes in the heart which eventually cumulates into interstitial fibrosis, m ...
... Hypertension is the commonest of the cardiovascular risk factors, whose prevalence in Tanzania is high between 20-30%, among rural and urban residents respectively. Uncontrolled hypertension leads to a number of structural changes in the heart which eventually cumulates into interstitial fibrosis, m ...
Document
... necessary to keep the insides of these cells relatively electronegative. These ions pass into and out of the cell through special ion channels in the cell membrane. The most common natural cause of sudden death in young persons is a disturbance in the electrical flow through the heart, called an arr ...
... necessary to keep the insides of these cells relatively electronegative. These ions pass into and out of the cell through special ion channels in the cell membrane. The most common natural cause of sudden death in young persons is a disturbance in the electrical flow through the heart, called an arr ...
Effects of myocardial ischemia on the release of cardiac troponin i in
... In our study, the concentration of cardiac troponin I was significantly higher in group III than in groups I and II and in group II compared with group I. The concentration of cardiac troponin I increased as the ischemic period increased. CK-MB and LD concentrations did not show a similar evolution. ...
... In our study, the concentration of cardiac troponin I was significantly higher in group III than in groups I and II and in group II compared with group I. The concentration of cardiac troponin I increased as the ischemic period increased. CK-MB and LD concentrations did not show a similar evolution. ...
acc/aha/esc practice guidelines—executive
... more episodes, AF is considered recurrent. Once terminated, recurrent AF is designated paroxysmal, and when sustained, persistent. In the latter case, termination by pharmacological therapy or electrical cardioversion does not change the designation. Persistent AF can be either the first presentatio ...
... more episodes, AF is considered recurrent. Once terminated, recurrent AF is designated paroxysmal, and when sustained, persistent. In the latter case, termination by pharmacological therapy or electrical cardioversion does not change the designation. Persistent AF can be either the first presentatio ...
Reproducibility of Echocardiographic Left Ventricular
... echocardiographic assessment of the left ventricle is available. Therefore, this review examines variability of echocardiographic measurements in a comprehensive manner, identifying the sources of variability in echocardiographic measurement, assessing available approaches to limit such variability, ...
... echocardiographic assessment of the left ventricle is available. Therefore, this review examines variability of echocardiographic measurements in a comprehensive manner, identifying the sources of variability in echocardiographic measurement, assessing available approaches to limit such variability, ...
PhD thesis
... Besides multicenter randomized clinical trials, multi- and single-center registries are also important sources for providing real-world information on CRT. It is well-known, that patients with NYHA class IV and inotropes, those with severe renal dysfunction, or on dialysis, those who are having coe ...
... Besides multicenter randomized clinical trials, multi- and single-center registries are also important sources for providing real-world information on CRT. It is well-known, that patients with NYHA class IV and inotropes, those with severe renal dysfunction, or on dialysis, those who are having coe ...
T-Vector Direction Differentiates Postpacing From Ischemic T
... AV delay to ensure ventricular activation from the endocardial pacemaker electrode positioned in the right ventricular apex. At 1 week, a 12-lead ECG was recorded after the pacemaker was reprogrammed in AAI mode. This ECG was used for analysis. The ischemic TWI (ISC) group of patients was retrospect ...
... AV delay to ensure ventricular activation from the endocardial pacemaker electrode positioned in the right ventricular apex. At 1 week, a 12-lead ECG was recorded after the pacemaker was reprogrammed in AAI mode. This ECG was used for analysis. The ischemic TWI (ISC) group of patients was retrospect ...
Catheter Ablation for Cardiac Arrhythmias
... the AV node. There are several subtypes of PSVT, the most common being AV nodal reentrant tachycardia (AVNRT). (1) Ablations for PSVT can usually be done in the right atrium, thus reducing the risk of entering the left atrium through trans-septal puncture. Because these ablations are very focused an ...
... the AV node. There are several subtypes of PSVT, the most common being AV nodal reentrant tachycardia (AVNRT). (1) Ablations for PSVT can usually be done in the right atrium, thus reducing the risk of entering the left atrium through trans-septal puncture. Because these ablations are very focused an ...
Strain rate imaging: fundamental principles and progress so far
... velocity of the myocardium relative to the transducer in a similar way as the conventional Doppler systems. The system is set-up in such a way as to filter out high velocities from small reflective regions as these characteristics are typical for blood. As such, only the (relatively) slow velocities ...
... velocity of the myocardium relative to the transducer in a similar way as the conventional Doppler systems. The system is set-up in such a way as to filter out high velocities from small reflective regions as these characteristics are typical for blood. As such, only the (relatively) slow velocities ...
Ca2+ Transient Declineand Myocardial Relaxation Are Slowed
... least load-dependent index of myocardial relaxation is the time constant of left ventricular pressure decline (Tp)I (2-4). Several studies have documented an increase of rp during ischemia in a variety of experimental preparations (5-9) and patients with coronary artery disease (10- 12). The mechani ...
... least load-dependent index of myocardial relaxation is the time constant of left ventricular pressure decline (Tp)I (2-4). Several studies have documented an increase of rp during ischemia in a variety of experimental preparations (5-9) and patients with coronary artery disease (10- 12). The mechani ...
I IIa IIb III - Heart Rhythm Society
... Many important clinical questions addressed in the guidelines do not lend themselves to clinical trials. Although randomized trials are unavailable, there may be a very clear clinical consensus that a particular test or therapy is useful or effective. *Data available from clinical trials or registri ...
... Many important clinical questions addressed in the guidelines do not lend themselves to clinical trials. Although randomized trials are unavailable, there may be a very clear clinical consensus that a particular test or therapy is useful or effective. *Data available from clinical trials or registri ...
biphasic defibrillation
... show the difference between the beating of a heart in NSR, and the unorganized chaos of VF. Unless defibrillated promptly, a heart in VF may degenerate into asystole, a “flat line” on the ECG. Defibrillation is electrical therapy for the heart in VF. It delivers an electrical shock to stop the chaot ...
... show the difference between the beating of a heart in NSR, and the unorganized chaos of VF. Unless defibrillated promptly, a heart in VF may degenerate into asystole, a “flat line” on the ECG. Defibrillation is electrical therapy for the heart in VF. It delivers an electrical shock to stop the chaot ...
Management of atrial fibrillation-Review
... cover.10–12,22 Use of low-molecular-weight heparin could simplify the treatment regimen, and allow early hospital discharge after cardioversion.23 When the left atrial appendage cannot be adequately seen, cardioversion should be done after 3 weeks of therapeutic anticoagulation. Anticoagulation with ...
... cover.10–12,22 Use of low-molecular-weight heparin could simplify the treatment regimen, and allow early hospital discharge after cardioversion.23 When the left atrial appendage cannot be adequately seen, cardioversion should be done after 3 weeks of therapeutic anticoagulation. Anticoagulation with ...
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.