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Arial fibrillation

David R Holmes
No abstract text is available yet for this article.
July 2016: Trends in Cardiovascular Medicine
Sung Ho Hwang, Yu-Whan Oh, Dae In Lee, Jaemin Shim, Sang-Weon Park, Young-Hoon Kim
By using late gadolinium enhancement cardiac magnetic resonance (LGE-CMR) imaging, we compared left atrial late gadolinium enhancement (LA-LGE) quantification methods based on different references to characterize the left atrial wall in patients with atrial fibrillation (AF). Thirty-eight patients who underwent three-dimensional LGE-CMR imaging before catheter ablation for AF were classified into three groups depending on their clinical AF type: (1) paroxysmal AF (PAF; n = 12); (2) persistent AF (PeAF; n = 16); and (3) recurrent AF after catheter ablation (RAF; n = 10)...
June 2015: International Journal of Cardiovascular Imaging
Hwan-Cheol Park, Yonggu Lee, DaeIn Lee, Yae Min Park, Jaemin Shim, Ji-Eun Ban, Jong-Il Choi, Sang-Weon Park, Young-Hoon Kim
Left arial (LA) function, defined according to conduit, reservoir and booster functions, is closely linked to left ventricular (LV) mechanics, particularly during diastole. Right ventricular pacing (RVP) is thought to impair LA diastolic restoring forces through alteration of ventricular activation. The aim of this study was to determine whether the LA functional reservoir estimated as the change in mean LA ejection fraction (EF) immediately after RVP, and for the second and for the third beats after RVP, predicts clinical outcome in patients with paroxysmal atrial fibrillation (AF) who have undergone catheter ablation (CA)...
December 2014: International Journal of Cardiovascular Imaging
John C Somberg
Arial fibrillation (AF) is the most commonly occurring sustained arrhythmia in the United States and is associated with increased mortality. AF is a risk factor for ischemic stroke, and risk factors for AF include comorbid conditions such as congestive heart failure, diabetes mellitus, older age, hypertension, diabetes, pulmonary disease, and history of stroke, transient ischemic attack, or heart failure. Risk stratification for ischemic stroke in AF patients is based on scoring a group of risk factors that allows for the appropriate tailoring of antithrombotic therapy...
November 2011: American Journal of Therapeutics
Raúl Alcaraz, Fernando Hornero, José Joaquín Rieta
The complete understanding of the mechanisms leading to the initiation, maintenance and self-termination of atrial fibrillation (AF) still is an unsolved challenge for cardiac electrophysiology. Studies in which AF has been induced have shown that electrophysiological and structural remodeling of the atria during the arrhythmia could play an important role in the transition from paroxysmal to persistent AF. However, to this day, the time course of the atrial remodeling along onward episodes of non-induced paroxysmal AF has not been investigated yet...
June 2011: Medical Engineering & Physics
Akira Tanaka, Yoshifumi Saijo
Left atrial spontaneous echo contrast (SEC) is a dynamic smoke-like signal caused by an increased ultrasonic backscatter from aggregation of the cellular components of blood in the conditions of blood stases or low-velocity blood flow. SEC can be detected by transesophageal echocardiography (TEE). SEC has been proposed as an important cadioembolic source in patients with nonrheumatic arial fibrillation. Previous clinical investigations have shown that the presence of SEC is associated with a greater incidence of left atrial thrombi...
2007: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Amit N Patel, Baron L Hamman, Amy N Patel, Robert F Hebeler, Richard E Wood, Carol Ann Cockerham, Brittany A Willey, Harold C Urschel
BACKGROUND: Atrial fibrillation is the most common complication after cardiac surgery. Current medical treatment using antiarrhythmics and anticoagulants has a significant morbidity. The goal of this study was to determine if epicardial atrial defibrillation can be safely performed and return patients to sinus rhythm. METHODS: A prospective analysis of patients undergoing cardiac surgery was performed. Patients with a prior pacemaker/defibrillator, history of arrhythmia, preoperative antiarrhythmic, age greater than 85 years, history of stroke, or intraaortic balloon pump were excluded...
March 2004: Annals of Thoracic Surgery
T R Engel, J C Luck, C L Leddy, A D Gonzalez
Extrastimulation in the atrial vulnerable zone may result in atrial fibrillation or flutter (AFF), especially with stimulation of multiple atrial sites. However, the clinical relevance of such vulnerability to AFF is unknown. Therefore, single twice-threshold extrastimuli were applied at three disparate right atrial sites in 45 consecutive unmedicated patients without overt heart failure. Group I consisted of 12 patients with documented spontaneous paroxysms of AFF. AFF was duplicated in 9 to 12 patients using extrastimulation in the vulnerable zone (5 in sinus rhythm, 4 requiring atrial pacing at 120 beats/min)...
March 1979: Pacing and Clinical Electrophysiology: PACE
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