left axis deviation
... prototype arrhythmia of the Long QT Interval Syndromes (LQTS) is Torsade-de-pointes, a polymorphic ventricular tachycardia characterized by varying QRS morphology and amplitude around the isoelectric baseline. Causes of LQTS include the following Drugs (many antiarrhythmics, tricyclics, phenothiazin ...
... prototype arrhythmia of the Long QT Interval Syndromes (LQTS) is Torsade-de-pointes, a polymorphic ventricular tachycardia characterized by varying QRS morphology and amplitude around the isoelectric baseline. Causes of LQTS include the following Drugs (many antiarrhythmics, tricyclics, phenothiazin ...
atrial fibrillation
... examination of the myocardium have shown that there are electrical and structural changes in the heart, aka remodeling, that sustain atrial fibrillation once a triggering focus has begun to initiate the arrhythmia.11,14 These changes in the electrical and structural part of the heart can include a d ...
... examination of the myocardium have shown that there are electrical and structural changes in the heart, aka remodeling, that sustain atrial fibrillation once a triggering focus has begun to initiate the arrhythmia.11,14 These changes in the electrical and structural part of the heart can include a d ...
wide qrs tachycardia
... BB recommended for PMVT with normal QT Magnesium for PMVT with long QT ...
... BB recommended for PMVT with normal QT Magnesium for PMVT with long QT ...
Beachey Ch 18 ECG and Cardiac Arrhythmias
... Stress, alcohol, tobacco, caffeine, electrolyte imbalances, sympathetic stimulation Drugs: sodium & calcium channel inhibitors may be used: quinidine: verapamil ...
... Stress, alcohol, tobacco, caffeine, electrolyte imbalances, sympathetic stimulation Drugs: sodium & calcium channel inhibitors may be used: quinidine: verapamil ...
Determination of Inadvertent Atrial Capture During Para
... remains constant with current reduction, resulting in a widening of the QRS. This might be mistaken to indicate the presence of a septal accessory pathway, except that stimulus-to-atrial interval at the proximal coronary is ⬍60 ms, indicating direct atrial capture (see text). Slight repositioning to ...
... remains constant with current reduction, resulting in a widening of the QRS. This might be mistaken to indicate the presence of a septal accessory pathway, except that stimulus-to-atrial interval at the proximal coronary is ⬍60 ms, indicating direct atrial capture (see text). Slight repositioning to ...
REVIEW ARTICLE CARDIOVASCULAR SENSORY RECEPTORS
... ( Received on December 15, 2002 ) Abstract : The role of cardiovascular receptors in the neural regulation of circulatory system is now well established. Atrial type B receptors located in the two atria and veno-atrial junctions, which are stimulated by atrial filling are believed to play an importa ...
... ( Received on December 15, 2002 ) Abstract : The role of cardiovascular receptors in the neural regulation of circulatory system is now well established. Atrial type B receptors located in the two atria and veno-atrial junctions, which are stimulated by atrial filling are believed to play an importa ...
ECG recording: basic principles
... specialised and requires skill, education and experience. Those who are not familiar with the skill and have not had the necessary education should not be expected to make any clinical decisions based on an ECG. It is important however that a nurse is able to recognise what constitutes a normal ECG ...
... specialised and requires skill, education and experience. Those who are not familiar with the skill and have not had the necessary education should not be expected to make any clinical decisions based on an ECG. It is important however that a nurse is able to recognise what constitutes a normal ECG ...
Focal atrial tachycardia
... FAT has been reported in subjects with structurally normal hearts as well as in patients with ischemic or congenital heart disease, hypertrophic cardiomyopathy, atrial tumors, myocarditis, septal or appendage aneurysms and valvular, metabolic and bronchopulmonary diseases.4,32-37 The clinical presen ...
... FAT has been reported in subjects with structurally normal hearts as well as in patients with ischemic or congenital heart disease, hypertrophic cardiomyopathy, atrial tumors, myocarditis, septal or appendage aneurysms and valvular, metabolic and bronchopulmonary diseases.4,32-37 The clinical presen ...
Basic ECG Theory, 12-Lead Recordings and Their Interpretation
... Myocardial infarction and angina pectoris were also extensively studied with ECG using the string galvanometer device. Numerous clinical investigators also studied the changes within the ECG signal that were associated with the onset of myocardial infarction in both animals and humans. By the 1930s, ...
... Myocardial infarction and angina pectoris were also extensively studied with ECG using the string galvanometer device. Numerous clinical investigators also studied the changes within the ECG signal that were associated with the onset of myocardial infarction in both animals and humans. By the 1930s, ...
Arrhythmia-Induced Cardiomyopathies
... postural orthostatic tachycardia syndrome (POTS), although the average heart rate can be >100 beats/ min. There is no specific heart rate cutoff at which AIC develops. The rate is not well defined, may be age dependent, and is likely lower than initially suspected. Little is known about patient factor ...
... postural orthostatic tachycardia syndrome (POTS), although the average heart rate can be >100 beats/ min. There is no specific heart rate cutoff at which AIC develops. The rate is not well defined, may be age dependent, and is likely lower than initially suspected. Little is known about patient factor ...
Assessment of Atrial Septal Defect Area Changes During Cardiac
... intraoperative defect area was calculated assuming an ellipsoidal shape, because it was difficult to measure directly. Therefore, in agreement with other studies 7,8), we assumed most ASDs were ellipsoidal shape and we used only directly measured major and minor axes. Another limitation of the prese ...
... intraoperative defect area was calculated assuming an ellipsoidal shape, because it was difficult to measure directly. Therefore, in agreement with other studies 7,8), we assumed most ASDs were ellipsoidal shape and we used only directly measured major and minor axes. Another limitation of the prese ...
Theoretical considerations for mapping activation in human cardiac fibrillation Wouter-Jan Rappel
... We then validate that a recently developed mapping technique which employs bi-atrial multielectrode contact arrays is able to capture localized rotors and focal sources for human AF. ...
... We then validate that a recently developed mapping technique which employs bi-atrial multielectrode contact arrays is able to capture localized rotors and focal sources for human AF. ...
Pulse Pressure and Risk of New
... was valid. Death was treated as a censoring event. Follow-up also was censored after 20 years, with the final participant censored in this manner in December 2004. Estimates were adjusted to account for competing risk from mortality during the follow-up period.26 Covariates selected for adjustment w ...
... was valid. Death was treated as a censoring event. Follow-up also was censored after 20 years, with the final participant censored in this manner in December 2004. Estimates were adjusted to account for competing risk from mortality during the follow-up period.26 Covariates selected for adjustment w ...
The Relationship Between Pericardial Fat and Atrial Fibrillation
... does not take into account fat distribution variations over the entire heart. Additionally, factors such as obesity may lead to a poor sonic window. A significant advantage of CT over echocardiography is the capacity to provide a wide field-ofview of the entire chest. Unlike echocardiography and MRI ...
... does not take into account fat distribution variations over the entire heart. Additionally, factors such as obesity may lead to a poor sonic window. A significant advantage of CT over echocardiography is the capacity to provide a wide field-ofview of the entire chest. Unlike echocardiography and MRI ...
Participate in Work
... potentially life threatening cardiac rhythm that occurs when no blood is pumped from the heart and all parts of the heartbeat are out of sync. c. Ventricular tachycardia (V-Tach or VT) is another abnormal, potentially life-threatening arrhythmia that can lead to ventricular fibrillation. ...
... potentially life threatening cardiac rhythm that occurs when no blood is pumped from the heart and all parts of the heartbeat are out of sync. c. Ventricular tachycardia (V-Tach or VT) is another abnormal, potentially life-threatening arrhythmia that can lead to ventricular fibrillation. ...
Living anatomy of the atrioventricular junctions
... mostly in right anterior oblique views, precise localization is achieved by using the left anterior oblique view (compare Figs 1, 3 and 5–7). This allows recognition of the right and left free walls, and the distinction of these parietal zones from the septal area. Since the coronary sinus is positi ...
... mostly in right anterior oblique views, precise localization is achieved by using the left anterior oblique view (compare Figs 1, 3 and 5–7). This allows recognition of the right and left free walls, and the distinction of these parietal zones from the septal area. Since the coronary sinus is positi ...
Assessment of diastolic dysfunction and heart failure with integrated
... from the literature. An E/Ea ratio >5.6 by the Sonos system showed the optimal ...
... from the literature. An E/Ea ratio >5.6 by the Sonos system showed the optimal ...
Why is Regression of Left Ventricular Hypertrophy Convenient? QCVC Committees
... positive, continuous and statistically significant correlation between the left ventricular mass index corrected by body surface or by height to the 2.7 power and the maximum corrected QT so that there is a corrected QT interval prolongation as an increase of the left ventricular mass index occurs [ ...
... positive, continuous and statistically significant correlation between the left ventricular mass index corrected by body surface or by height to the 2.7 power and the maximum corrected QT so that there is a corrected QT interval prolongation as an increase of the left ventricular mass index occurs [ ...
molecular cloning and reduced expression in experimental heart
... Whereas baseline secretion of ANP was not different between both groups, ANP release after LA stretch was significantly reduced in animals with shunt. Because the pressure was subphysiological at baseline compared with intact animals and thereby the stimulus for ANP release was minimal under these c ...
... Whereas baseline secretion of ANP was not different between both groups, ANP release after LA stretch was significantly reduced in animals with shunt. Because the pressure was subphysiological at baseline compared with intact animals and thereby the stimulus for ANP release was minimal under these c ...
Editorial
... of contraction), and alterations to them can lead to a wide variety of cardiac disease phenotypes. For Ito alone, studies demonstrate a correlation between increased Ito and early-onset lone atrial fibrillation, Brugada syndrome, and idiopathic ventricular fibrillation, whereas decreases in Ito have ...
... of contraction), and alterations to them can lead to a wide variety of cardiac disease phenotypes. For Ito alone, studies demonstrate a correlation between increased Ito and early-onset lone atrial fibrillation, Brugada syndrome, and idiopathic ventricular fibrillation, whereas decreases in Ito have ...
Adenosine in the treatment of supraventricular tachycardia: 5 years
... caution should be taken in case of atrial flutter, as described above: secondary enhancement of AV nodal conduction following initial AV block seems to be related to sympathetic activation, after which it is perpetuated by the onset of 1:1 conduction. In addition, adenosine causes a reflex increase ...
... caution should be taken in case of atrial flutter, as described above: secondary enhancement of AV nodal conduction following initial AV block seems to be related to sympathetic activation, after which it is perpetuated by the onset of 1:1 conduction. In addition, adenosine causes a reflex increase ...
Spatial QRS-T angle predicts cardiac death in a
... angle in predicting cardiovascular mortality in a large, general hospital-based population. Our findings support the value of repolarization measures13–15 as determined by the spatial QRS-T angle as a tool for risk stratification. Although considered a marker of pathology from the early days of ECG, ...
... angle in predicting cardiovascular mortality in a large, general hospital-based population. Our findings support the value of repolarization measures13–15 as determined by the spatial QRS-T angle as a tool for risk stratification. Although considered a marker of pathology from the early days of ECG, ...
Morphological abnormalities in baseline ECGs in healthy
... athletes; and found that 12 per cent had morphological abnormalities3. However, these subjects do not really represent normal healthy individuals in the population. Physical fitness of the normal population may not be comparable to that of air force personnel and athletes. Sustained high level of ex ...
... athletes; and found that 12 per cent had morphological abnormalities3. However, these subjects do not really represent normal healthy individuals in the population. Physical fitness of the normal population may not be comparable to that of air force personnel and athletes. Sustained high level of ex ...
Atrial fibrillation
Atrial fibrillation (AF or A-fib) is an abnormal heart rhythm characterized by rapid and irregular beating. Often it starts as brief periods of abnormal beating which become longer and possibly constant over time. Most episodes have no symptoms. Occasionally there may be heart palpitations, fainting, shortness of breath, or chest pain. The disease increases the risk of heart failure, dementia, and stroke.Hypertension and valvular heart disease are the most common alterable risk factors for AF. Other heart-related risk factors include heart failure, coronary artery disease, cardiomyopathy, and congenital heart disease. In the developing world valvular heart disease often occurs as a result of rheumatic fever. Lung-related risk factors include COPD, obesity, and sleep apnea. Other factors include excess alcohol intake, diabetes mellitus, and thyrotoxicosis. However, half of cases are not associated with one of these risks. A diagnosis is made by feeling the pulse and may be confirmed using an electrocardiogram (ECG). The typical ECG shows no P waves and an irregular ventricular rate.AF is often treated with medications to slow the heart rate to a near normal range (known as rate control) or to convert the rhythm to normal sinus rhythm (known as rhythm control). Electrical cardioversion can also be used to convert AF to a normal sinus rhythm and is often used emergently if the person is unstable. Ablation may prevent recurrence in some people. Depending on the risk of stroke either aspirin or anti-clotting medications such as warfarin or a novel oral anticoagulant may be recommended. While these medications reduce this risk, they increase rates of major bleeding.Atrial fibrillation is the most common serious abnormal heart rhythm. In Europe and North America, as of 2014, it affects about 2% to 3% of the population. This is an increase from 0.4 to 1% of the population around 2005. In the developing world about 0.6% of males and 0.4% of females are affected. The percentage of people with AF increases with age with 0.14% under 50 years old, 4% between 60 and 70 years old, and 14% over 80 years old being affected. A-fib and atrial flutter resulted in 112,000 deaths in 2013, up from 29,000 in 1990. The first known report of an irregular pulse was by John Baptist Senac in 1749. This was first documented by ECG in 1909 by Thomas Lewis.