ICD Arrhythmia Detection and Discrimination: Are We There Yet?
... with both high sensitivity and specificity for differentiation of SVT from VT are inevitably looming on the horizon. It is possible that if currently available algorithms (stability, onset, morphology, etc.) are tested with algorithms using morphology discrimination in a large, “real-world” patient ...
... with both high sensitivity and specificity for differentiation of SVT from VT are inevitably looming on the horizon. It is possible that if currently available algorithms (stability, onset, morphology, etc.) are tested with algorithms using morphology discrimination in a large, “real-world” patient ...
Right Ventricular Ejection Function Assessed by - J
... right ventricular overload. They also suggests that 2-D echocardiography is a useful non-invasive means of assessing right ventricular ejection function. Study Limitations In the present study, there were no cases of coronary heart disease, atrial septal defect or severe pulmonary hypertension in wh ...
... right ventricular overload. They also suggests that 2-D echocardiography is a useful non-invasive means of assessing right ventricular ejection function. Study Limitations In the present study, there were no cases of coronary heart disease, atrial septal defect or severe pulmonary hypertension in wh ...
Text - University of Glasgow
... there are few large epidemiological studies of its prevalence, incidence, and risk factors. The epidemiological features of AF are described in one of the largest population cohorts ever studied. Methods—The prevalence and incidence of AF were studied in the Renfrew/Paisley population cohort of 15 4 ...
... there are few large epidemiological studies of its prevalence, incidence, and risk factors. The epidemiological features of AF are described in one of the largest population cohorts ever studied. Methods—The prevalence and incidence of AF were studied in the Renfrew/Paisley population cohort of 15 4 ...
Run for your life … at a comfortable speed and not too far
... from Minnesota evaluated a group of runners who had completed at least 25 marathons over 25 years and found a 60% increase in coronary plaque burden compared with sedentary age-matched controls.1 These findings were replicated by a group from Germany, who showed increased coronary plaque in 108 chron ...
... from Minnesota evaluated a group of runners who had completed at least 25 marathons over 25 years and found a 60% increase in coronary plaque burden compared with sedentary age-matched controls.1 These findings were replicated by a group from Germany, who showed increased coronary plaque in 108 chron ...
ELECTROCARDIOGRAPH
... Right Bundle Branch Block • RAD, at least for the terminal portion of the QRS complex ...
... Right Bundle Branch Block • RAD, at least for the terminal portion of the QRS complex ...
Outcome of Patients Discharged after their First Detected
... meta-analysis showed that, in patients with an implanted device (pace-maker or internal defibrillator) asymptomatic atrial tachyarrhythmias, without clinical atrial fibrillation, were associated with a significantly increased risk of ischemic stroke or systemic embolism.17 This has important implica ...
... meta-analysis showed that, in patients with an implanted device (pace-maker or internal defibrillator) asymptomatic atrial tachyarrhythmias, without clinical atrial fibrillation, were associated with a significantly increased risk of ischemic stroke or systemic embolism.17 This has important implica ...
W1 Update on ECG skills for psychiatrists – Combined presentation
... – presentation can range from non-specific symptoms to severe left ventricular impairment, pulmonary oedema, cardiogenic shock and death (usually within weeks of starting Rx) ...
... – presentation can range from non-specific symptoms to severe left ventricular impairment, pulmonary oedema, cardiogenic shock and death (usually within weeks of starting Rx) ...
Left ventricular aneurysms: early and long-term results of
... (mean no. of grafts/patient, 2.7G0.8) and 14 (12.7%) had associated coronary endarterectomy. Forty-four (40.0%) patients had angina CCS class III/IV (linear 43.4%, patch 32.4%, NS) and the majority was in NYHA class I/II (88.2% in both groups). Left ventricular dysfunction (EFO40%) was present in 72 ...
... (mean no. of grafts/patient, 2.7G0.8) and 14 (12.7%) had associated coronary endarterectomy. Forty-four (40.0%) patients had angina CCS class III/IV (linear 43.4%, patch 32.4%, NS) and the majority was in NYHA class I/II (88.2% in both groups). Left ventricular dysfunction (EFO40%) was present in 72 ...
Right ventricular function in systemic hypertension
... importance of diastolic function to cardiac performance. Altered profiles of LV diastolic filling with diminished early filling and increased late or atrial filling are common echocardiographic findings in hypertensive patients. LV hypertrophy and ischaemia are among the major causes of ventricular ...
... importance of diastolic function to cardiac performance. Altered profiles of LV diastolic filling with diminished early filling and increased late or atrial filling are common echocardiographic findings in hypertensive patients. LV hypertrophy and ischaemia are among the major causes of ventricular ...
Incidence of Atrial Fibrillation in Patients with either Heart Failure or
... by the few number of patients who experienced AF during follow-up (n = 32). Thus, this study statistically lacked power to provide any clear results of the association between MI and the effect of treatment with dofetilide on new-onset AF. However, we found no interaction with study that is the effe ...
... by the few number of patients who experienced AF during follow-up (n = 32). Thus, this study statistically lacked power to provide any clear results of the association between MI and the effect of treatment with dofetilide on new-onset AF. However, we found no interaction with study that is the effe ...
Amiodarone-Induced Postrepolarization Refractoriness Suppresses
... Maltsev et al., 2001), the electrophysiological effects by which amiodarone exerts this unique antiarrhythmic action are not well understood. A series of premature stimuli applied at the shortest possible coupling interval allow earlier capture of each consecutive stimulus. This shortening of the ef ...
... Maltsev et al., 2001), the electrophysiological effects by which amiodarone exerts this unique antiarrhythmic action are not well understood. A series of premature stimuli applied at the shortest possible coupling interval allow earlier capture of each consecutive stimulus. This shortening of the ef ...
Echocardiographic Evaluation of Left Ventricular Systolic and
... compensatory response to elevated blood pressure, which through a series of poorly understood events, results in LV dilation and systolic heart failure characterized by a reduced ejection fraction (EF).7 In those hypertensive patients with preserved LV function, hypertension has been associated with ...
... compensatory response to elevated blood pressure, which through a series of poorly understood events, results in LV dilation and systolic heart failure characterized by a reduced ejection fraction (EF).7 In those hypertensive patients with preserved LV function, hypertension has been associated with ...
SECTION 2
... A. SA node, AV node, internodal pathways, Purkinje system, bundle branches, bundle of His Rationale: The intranodal pathways come before the AV node. B. Internodal pathways, SA node, AV node, bundle branches, bundle of His, Purkinje system Rationale: The SA node is before the intranodal pathways. C. ...
... A. SA node, AV node, internodal pathways, Purkinje system, bundle branches, bundle of His Rationale: The intranodal pathways come before the AV node. B. Internodal pathways, SA node, AV node, bundle branches, bundle of His, Purkinje system Rationale: The SA node is before the intranodal pathways. C. ...
PDF - Circulation: Arrhythmia and Electrophysiology
... fasciculoventricular bypass tracts (FVBT) share electrocardiographic features of both anteroseptal and midseptal pathways. Sternick et al3 systematically analyzed the value of (1) ECG frontal plane QRS and delta-wave axis; (2) QRS width; (3) R/S ratio in lead III; and (4) precordial lead transition ...
... fasciculoventricular bypass tracts (FVBT) share electrocardiographic features of both anteroseptal and midseptal pathways. Sternick et al3 systematically analyzed the value of (1) ECG frontal plane QRS and delta-wave axis; (2) QRS width; (3) R/S ratio in lead III; and (4) precordial lead transition ...
Contemporary Reviews in Cardiovascular Medicine
... The most common presentations of AVCD in adulthood are partial defects, which consist of a primum ASD and cleft mitral valve, or surgically repaired complete AVCD. It is less common for a patient who has not undergone surgery with complete AVCD, including a large primum ASD, inlet VSD, and cleft mit ...
... The most common presentations of AVCD in adulthood are partial defects, which consist of a primum ASD and cleft mitral valve, or surgically repaired complete AVCD. It is less common for a patient who has not undergone surgery with complete AVCD, including a large primum ASD, inlet VSD, and cleft mit ...
Use of Contrast Echocardiography for Evaluation of
... was gradually increased to the point that the overload phenomenon, as described by Valdes-Cruz et al.,8 9 was eliminated while still detecting echo-dense material produced by the injection. The patients' electrocardiograms were recorded simultaneously for timing purposes. Diagnostic records were obt ...
... was gradually increased to the point that the overload phenomenon, as described by Valdes-Cruz et al.,8 9 was eliminated while still detecting echo-dense material produced by the injection. The patients' electrocardiograms were recorded simultaneously for timing purposes. Diagnostic records were obt ...
The Right Ventricle: A Comprehensive Review From Anatomy
... is parallel with the atrioventricular groove. These fibers turn obliquely toward the cardiac apex and continue into the superficial myofibers of the LV. However, the deep muscle fibers of the RV are longitudinally aligned from base to apex. In contrast to the RV, the LV comprises obliquely oriented ...
... is parallel with the atrioventricular groove. These fibers turn obliquely toward the cardiac apex and continue into the superficial myofibers of the LV. However, the deep muscle fibers of the RV are longitudinally aligned from base to apex. In contrast to the RV, the LV comprises obliquely oriented ...
ECG Workshop - Kentucky Academy of Physician Assistants
... •PR interval constant •P before every QRS, not a QRS after every P (dropped beats) •Variable conduction (may drop every other, third, two in a row) 2:1; 3:1 ...
... •PR interval constant •P before every QRS, not a QRS after every P (dropped beats) •Variable conduction (may drop every other, third, two in a row) 2:1; 3:1 ...
Arrhythmia - PACT
... PR interval, Time to conduct through AVN and His bundle system, 0.12-0.20 QRS duration, Depolarisation of septum and ventricular tissue, 0.12 QT interval (QTc), Ventricular repolarisation, 0.38-0.42 SAN, AVN, and His bundle depolarisation are electrically silent on the ECG. An increase in QRS durati ...
... PR interval, Time to conduct through AVN and His bundle system, 0.12-0.20 QRS duration, Depolarisation of septum and ventricular tissue, 0.12 QT interval (QTc), Ventricular repolarisation, 0.38-0.42 SAN, AVN, and His bundle depolarisation are electrically silent on the ECG. An increase in QRS durati ...
Atrial Fibrillation and Heart Failure
... year in the presence of all of the following risk factors, recent congestive heart failure, history of hypertension, age ≥ 75 years, diabetes mellitus and prior stroke or history of prior thromboembolism.14 Data from the Framingham Heart Study suggest that the risk of stroke is increased by 4.8fold ...
... year in the presence of all of the following risk factors, recent congestive heart failure, history of hypertension, age ≥ 75 years, diabetes mellitus and prior stroke or history of prior thromboembolism.14 Data from the Framingham Heart Study suggest that the risk of stroke is increased by 4.8fold ...
Guidelines on autopsy practice - The Royal College of Pathologists
... during exercise or emotional excitement). Document associated seizures, prodromal symptoms. Was the death witnessed? Were there any suspicious circumstances? Past medical history - General health status such as previous significant illness or events, particularly seizures, epilepsy, faints, syncope, ...
... during exercise or emotional excitement). Document associated seizures, prodromal symptoms. Was the death witnessed? Were there any suspicious circumstances? Past medical history - General health status such as previous significant illness or events, particularly seizures, epilepsy, faints, syncope, ...
Effect of Dronedarone on Cardiovascular Events in Atrial Fibrillation
... * There were no significant differences between the two groups for any of the baseline characteristics, with the exception of the proportion of study patients who were women, which was significantly greater in the dronedarone group (P = 0.002). ACE denotes angiotensin-converting enzyme, ARB angioten ...
... * There were no significant differences between the two groups for any of the baseline characteristics, with the exception of the proportion of study patients who were women, which was significantly greater in the dronedarone group (P = 0.002). ACE denotes angiotensin-converting enzyme, ARB angioten ...
Post-mortem in sudden unexpected death in the young: Guidelines
... during exercise or emotional excitement). Document associated seizures, prodromal symptoms. Was the death witnessed? Were there any suspicious circumstances? Past medical history - General health status such as previous significant illness or events, particularly seizures, epilepsy, faints, syncope, ...
... during exercise or emotional excitement). Document associated seizures, prodromal symptoms. Was the death witnessed? Were there any suspicious circumstances? Past medical history - General health status such as previous significant illness or events, particularly seizures, epilepsy, faints, syncope, ...
The effect of left ventricular pacing site on cardiac resynchronization
... infarct areas separated by segments with normal or near-normal function.19 It is therefore not surprising that some patients are not resynchronized at a standard optimal LV-PS, whereas other patients are well resynchronized, despite a presumed non-optimal LV-PS. This is supported by Ypenburg et al.1 ...
... infarct areas separated by segments with normal or near-normal function.19 It is therefore not surprising that some patients are not resynchronized at a standard optimal LV-PS, whereas other patients are well resynchronized, despite a presumed non-optimal LV-PS. This is supported by Ypenburg et al.1 ...
Crafting The Perfect Shock
... rhythm of the impulse as it travels along, and the most dangerous kind of these arrhythmias is ventricular fibrillation, which is typically the cause of death in someone who is electrocuted. What brings on death is the uncoordinated electrical activation of the heart’s main pumping chambers. The he ...
... rhythm of the impulse as it travels along, and the most dangerous kind of these arrhythmias is ventricular fibrillation, which is typically the cause of death in someone who is electrocuted. What brings on death is the uncoordinated electrical activation of the heart’s main pumping chambers. The he ...
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.