Atrial Fibrillation in Hypertrophic Obstructive Cardiomyopathy
... to treat AF is being performed with increasing frequency and safety. The technique has emerged as a first-line therapy in medically-refractive AF 39 and in one trial was an effective initial treatment compared to medication. 40 In a recent comprehensive systemic review of 63 studies that examined bo ...
... to treat AF is being performed with increasing frequency and safety. The technique has emerged as a first-line therapy in medically-refractive AF 39 and in one trial was an effective initial treatment compared to medication. 40 In a recent comprehensive systemic review of 63 studies that examined bo ...
Beta‐Blocker Use Is Associated With Impaired Left Atrial Function in
... Background-—Impaired left atrial (LA) mechanical function is present in hypertension and likely contributes to various complications, including atrial arrhythmias, stroke, and heart failure. Various antihypertensive drug classes exert differential effects on central hemodynamics and left ventricular ...
... Background-—Impaired left atrial (LA) mechanical function is present in hypertension and likely contributes to various complications, including atrial arrhythmias, stroke, and heart failure. Various antihypertensive drug classes exert differential effects on central hemodynamics and left ventricular ...
- KoreaMed Synapse
... INCX activation, which coordinately regulates sinus rate along with the voltage clock.13-15 The idea of Ca2+ clock suggests that the mechanism of automaticity is the same as that of delayed afterdepolarization (DAD), which occurs when there is SR Ca2+ overload. This suggests that the SAN must exist ...
... INCX activation, which coordinately regulates sinus rate along with the voltage clock.13-15 The idea of Ca2+ clock suggests that the mechanism of automaticity is the same as that of delayed afterdepolarization (DAD), which occurs when there is SR Ca2+ overload. This suggests that the SAN must exist ...
Lethal Arrhythmias
... ... Tanna R. Thomason, RN, MS, CCRN, contributor to this course. Tanna is the primary author of RN.com’s ECG Interpretation: Learning the Basics. Tanna has over 20 years of experience as a clinician in the hospital setting. After completing her Master’s Degree as a Clinical Nurse Specialist from San ...
... ... Tanna R. Thomason, RN, MS, CCRN, contributor to this course. Tanna is the primary author of RN.com’s ECG Interpretation: Learning the Basics. Tanna has over 20 years of experience as a clinician in the hospital setting. After completing her Master’s Degree as a Clinical Nurse Specialist from San ...
- St George`s, University of London
... and thyrotoxicosis. More commonly, AF affects the older athlete, often following decades of endurance exercise58-60. where evaluation for hypertension and underlying coronary artery disease is recommended. ...
... and thyrotoxicosis. More commonly, AF affects the older athlete, often following decades of endurance exercise58-60. where evaluation for hypertension and underlying coronary artery disease is recommended. ...
Atrial Remodeling and Atrial Fibrillation
... remains sustained for prolonged periods, remains uncertain.24 Figure 5 summarizes the molecular mechanisms that underlie ATR promotion of reentrant AF. ATR abbreviates atrial refractoriness by decreasing APD, primarily by ICaL downregulation5 but also via increased inward-rectifier K⫹ currents such ...
... remains sustained for prolonged periods, remains uncertain.24 Figure 5 summarizes the molecular mechanisms that underlie ATR promotion of reentrant AF. ATR abbreviates atrial refractoriness by decreasing APD, primarily by ICaL downregulation5 but also via increased inward-rectifier K⫹ currents such ...
Regulation of atrial natriuretic peptide
... attenuated by vagotomy (Ledsome, 1985). ANP has been found to increase in humans with water immersion (Epstein et al., 1989), in clinical conditions such as heart failure (Tikkanen et al., 1985) and renal failure (Rascher et al., 1985). Rate of contraction has been suggested to stimulate ANP secreti ...
... attenuated by vagotomy (Ledsome, 1985). ANP has been found to increase in humans with water immersion (Epstein et al., 1989), in clinical conditions such as heart failure (Tikkanen et al., 1985) and renal failure (Rascher et al., 1985). Rate of contraction has been suggested to stimulate ANP secreti ...
Biventricular implantable cardioverter defibrillator use in
... of patients will be treated with both ICDs and biventricular pacemakers in the future. Using a combination of pacemaker and ICD can lead to inter-device interaction[5]. A recent report described the use of a biventricular pacemaker in a patient previously implanted with an ICD[6]. To prevent device ...
... of patients will be treated with both ICDs and biventricular pacemakers in the future. Using a combination of pacemaker and ICD can lead to inter-device interaction[5]. A recent report described the use of a biventricular pacemaker in a patient previously implanted with an ICD[6]. To prevent device ...
state of michigan michigan administrative hearing system
... touch and atrophic. Capillary fill time, both feet, was delayed at about 8 seconds. Chest x-rays showed evidence of congestive heart failure. EKG showed atrial fibrillation. Echocardiogram done on 8/1/06 showed suboptimal study. Ejection fraction was estimated around 40%. The 2-D echocardiogram show ...
... touch and atrophic. Capillary fill time, both feet, was delayed at about 8 seconds. Chest x-rays showed evidence of congestive heart failure. EKG showed atrial fibrillation. Echocardiogram done on 8/1/06 showed suboptimal study. Ejection fraction was estimated around 40%. The 2-D echocardiogram show ...
Arrhythmia/Electrophysiology
... waves, as predicted by previous studies.22–25 Given that the virtual electrodes created by field stimulation substitute for multiple physically implanted electrodes, this approach promises to provide a means of suppressing atrial tachyarrhythmias less invasively and with less physical and psychologi ...
... waves, as predicted by previous studies.22–25 Given that the virtual electrodes created by field stimulation substitute for multiple physically implanted electrodes, this approach promises to provide a means of suppressing atrial tachyarrhythmias less invasively and with less physical and psychologi ...
Abnormal electrocardiographic findings in athletes
... This document was developed in collaboration between the American Medical Society for Sports Medicine (AMSSM), the Section on Sports Cardiology of the European Association for Cardiovascular Prevention and Rehabilitation (EACPR), a registered branch of the European Society of Cardiology (ESC), the F ...
... This document was developed in collaboration between the American Medical Society for Sports Medicine (AMSSM), the Section on Sports Cardiology of the European Association for Cardiovascular Prevention and Rehabilitation (EACPR), a registered branch of the European Society of Cardiology (ESC), the F ...
Document
... • Multifocal atrial tachycardia (MAT) is a pathological condition that presents with the same characteristics as wandering atrial pacemaker but has heart rates of 120 to 150 beats per minute • Supraventricular tachycardia arises from above the ventricles but cannot be definitively identified as atri ...
... • Multifocal atrial tachycardia (MAT) is a pathological condition that presents with the same characteristics as wandering atrial pacemaker but has heart rates of 120 to 150 beats per minute • Supraventricular tachycardia arises from above the ventricles but cannot be definitively identified as atri ...
Rapidly detecting disorder in rhythmic biological signals: A spectral
... rhythm of the heart and can be caused by a range of cardiovascular diseases. In particular, atrial fibrillation is a common arrhythmia affecting 0.4% of the population and 5%– 10% of those over 60 years old 关2兴; it can lead to a very high 共up to 15-fold兲 risk of stroke 关3兴. Heart arrhythmias are thu ...
... rhythm of the heart and can be caused by a range of cardiovascular diseases. In particular, atrial fibrillation is a common arrhythmia affecting 0.4% of the population and 5%– 10% of those over 60 years old 关2兴; it can lead to a very high 共up to 15-fold兲 risk of stroke 关3兴. Heart arrhythmias are thu ...
Learn ECG in a Day
... Electrocardiography is the recording of the electrical impulses that are generated in the heart. These impulses initiate the contraction of cardiac muscles. The term vector is used to describe these electrical impulses. The vector is a diagrammatic way to show the strength and the direction of the e ...
... Electrocardiography is the recording of the electrical impulses that are generated in the heart. These impulses initiate the contraction of cardiac muscles. The term vector is used to describe these electrical impulses. The vector is a diagrammatic way to show the strength and the direction of the e ...
Site-Specific Transseptal Puncture for Emerging Structural Heart
... tenting. Puncture can then be completed under direct visualization by ICE. Although ICE is an invaluable tool and may be adequate to direct most left-sided electrophysiology procedures, it does not provide equivalent visualization to TEE and cannot be used as a substitute for TEE to guide most struc ...
... tenting. Puncture can then be completed under direct visualization by ICE. Although ICE is an invaluable tool and may be adequate to direct most left-sided electrophysiology procedures, it does not provide equivalent visualization to TEE and cannot be used as a substitute for TEE to guide most struc ...
A Conceptual Model of Cardiac Electrophysiology based on UML
... (muscle of the heart). When the myocardium is stimulated, it contracts. It is the ordered stimulation of the myocardium that allows efficient contraction of the heart, thereby allowing blood to be pumped to the body. Under normal conditions, electrical activity is spontaneously generated by the SA n ...
... (muscle of the heart). When the myocardium is stimulated, it contracts. It is the ordered stimulation of the myocardium that allows efficient contraction of the heart, thereby allowing blood to be pumped to the body. Under normal conditions, electrical activity is spontaneously generated by the SA n ...
Cardiovascular Medicine 2017
... submassive pulmonary embolism >> Case-based approaches to heart failure management >> Emerging imaging and therapeutic technologies >> Intersection of cardiovascular medicine with internal medicine Earn up to 39.50 AMA PRA Category 1 Credits™ ...
... submassive pulmonary embolism >> Case-based approaches to heart failure management >> Emerging imaging and therapeutic technologies >> Intersection of cardiovascular medicine with internal medicine Earn up to 39.50 AMA PRA Category 1 Credits™ ...
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ecg interpretation [f04]
... Membrane channels open and close in response to a stimulus (electrical, chemical, or mechanical). They are also affected by the concentration gradient. Charged particles also move in response to an electrical gradient. Positively charged ions are attracted to negatively charged ions and vice versa. ...
... Membrane channels open and close in response to a stimulus (electrical, chemical, or mechanical). They are also affected by the concentration gradient. Charged particles also move in response to an electrical gradient. Positively charged ions are attracted to negatively charged ions and vice versa. ...
Pacemaker and Atrio- Ventricular Node Ablation for Atrial Fibrillation
... occurs in the upper chambers (atria) of the heart. This abnormal heart rhythm disturbs the organised heart contraction and produces irregular blood flow through the heart. In most cases patients experience palpitations, breathlessness, tiredness or light-headedness. Sometimes patients do not feel th ...
... occurs in the upper chambers (atria) of the heart. This abnormal heart rhythm disturbs the organised heart contraction and produces irregular blood flow through the heart. In most cases patients experience palpitations, breathlessness, tiredness or light-headedness. Sometimes patients do not feel th ...
HeartStart MRx and XL AED Algorithm
... experts according to the classifications shown in Table 1 “Rhythm Classifications” on page 5. All of the data was split in half into a training and a testing database. The training data was used to develop the algorithm. The testing data was used to validate the algorithm’s performance, and was not ...
... experts according to the classifications shown in Table 1 “Rhythm Classifications” on page 5. All of the data was split in half into a training and a testing database. The training data was used to develop the algorithm. The testing data was used to validate the algorithm’s performance, and was not ...
Endocardial wave front organization during ventricular
... irregular arrhythmic contraction” (2). Wiggers used highspeed cinematography to describe four stages of progressive disorganization through which VF transitions from initiation to cardiac quiescence (3). More recently, multi-channel computerized electrical and optical cardiac mapping have been used ...
... irregular arrhythmic contraction” (2). Wiggers used highspeed cinematography to describe four stages of progressive disorganization through which VF transitions from initiation to cardiac quiescence (3). More recently, multi-channel computerized electrical and optical cardiac mapping have been used ...
The Atrial Coronary Arteries in Man
... left and right atria. Our findings suggest that this is not always true, and would support the use of a different type of nomenclature. Of these small and numerous atrial arteries, 2 groups were less variable than the others. The first of these was the group in the region of the margo acutus, simila ...
... left and right atria. Our findings suggest that this is not always true, and would support the use of a different type of nomenclature. Of these small and numerous atrial arteries, 2 groups were less variable than the others. The first of these was the group in the region of the margo acutus, simila ...
Print this article
... Diagnosis is usually made after detection of a murmur in babies and accidental or symptom related finding in adults where echocardiographic examination reveals a septal defect with or without right heart volume overload [15-18]. Transesophageal echocardiography (TEE) may be performed for a more prec ...
... Diagnosis is usually made after detection of a murmur in babies and accidental or symptom related finding in adults where echocardiographic examination reveals a septal defect with or without right heart volume overload [15-18]. Transesophageal echocardiography (TEE) may be performed for a more prec ...
The Johns Hopkins Arrhythmia Service A guide for patients and their families
... lower chamber of the heart (the ventricles) beat at a slower rate (often 75 to 150 beats per minute). Like atrial fibrillation, atrial flutter occurs most commonly in elderly patients and those with other types of heart disease. It also can cause a wide variety of symptoms and increase the risk of d ...
... lower chamber of the heart (the ventricles) beat at a slower rate (often 75 to 150 beats per minute). Like atrial fibrillation, atrial flutter occurs most commonly in elderly patients and those with other types of heart disease. It also can cause a wide variety of symptoms and increase the risk of d ...
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.