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To assess the risk of incident atrial fibrillation after stopping anti-hypertensive medication including beta-blockers and ACE inhibitors. Also, to assess the role of genetics in subsequent risk of stroke among patients with atrial fibrillation.
Prevention and treatment of atrial fibrillation (AF) is a significant public health issue. Atrial fibrillation affects 9 percent of persons aged 80 to 89. It is associated with elevated risk of stroke and death. The condition is likely to increase as survival rates from myocardial infarction continue to improve, prevalence of congestive heart failure grows, and treatment approaches evolve. The study will assess the safety of commonly used medications in relation to the risk of incident atrial fibrillation, and will assess the association of several genetic polymorphisms with stroke risk after AF onset. Several lines of evidence suggest that both beta-blockers and ACE inhibitors may prevent or inhibit the atrial electrical remodeling that allows AF to become established and maintained. Withdrawal of these medications may be associated with increased risk of AF in individuals at risk. Genetic polymorphisms that promote thrombosis are associated with an increased risk of venous thrombosis, and in some studies, with arterial thrombosis including stroke or myocardial infarction. Although several recently published trials indicate that warfarin or aspirin treatment of patients with AF decreases the risk of stroke, little is known about the risk of stroke as a complication of AF in relation to genetic variants that affect clotting.
The main tasks of the case-control study are: 1) identification of cases with incident AF and controls; 2) review of outpatient and inpatient medical records to assess eligibility and collect information on risk factors and medical history; 3) classification of medication use over time; 4) for AF patients, telephone interview and collection of blood samples; 5) blood specimen processing, DNA extraction, and genotyping; and 6) data analysis of the associations of medication use and genotype with AF onset and stroke complications.
National Heart, Lung, and Blood Institute (NHLBI)
Published on BioPortfolio: 2014-08-27T03:56:41-0400
Comparison of Effectiveness of Ranolazine Plus Metoprolol Combination vs. FlecainidE pluS Metoprolol Combination in ATrial Fibrillation Recurrences FOllowing PhaRmacological or Electrical CardioverSion of AtRial Fibrillation
Atrial fibrillation (AF) is the most common arrhythmia in clinical practice with a prevalence reaching 5% in patients older than 65 years and an incidence that increases progressively with...
This is a sigle-center, prospective study to evaluate the role of D-Dimer testing in patients with atrial fibrillation receiving Dabigatran or warfarin anticoagulation therapy.
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Atrial fibrillation and hypertension are often coexistent. Their incidence increases with advancing age and they are responsible for considerable morbidity and mortality. The relation between theses 2...
The purpose of this study was to evaluate the usefulness of intra-atrial dyssynchrony as a marker of underlying left atrial (LA) remodeling to predict recurrence after the first atrial fibrillation (A...
Rapid, irregular atrial contractions caused by a block of electrical impulse conduction in the right atrium and a reentrant wave front traveling up the inter-atrial septum and down the right atrial free wall or vice versa. Unlike ATRIAL FIBRILLATION which is caused by abnormal impulse generation, typical atrial flutter is caused by abnormal impulse conduction. As in atrial fibrillation, patients with atrial flutter cannot effectively pump blood into the lower chambers of the heart (HEART VENTRICLES).
Long-term changes in the electrophysiological parameters and/or anatomical structures of the HEART ATRIA that result from prolonged changes in atrial rate, often associated with ATRIAL FIBRILLATION or long periods of intense EXERCISE.
A cardiotonic glycoside obtained mainly from Digitalis lanata; it consists of three sugars and the aglycone DIGOXIGENIN. Digoxin has positive inotropic and negative chronotropic activity. It is used to control ventricular rate in ATRIAL FIBRILLATION and in the management of congestive heart failure with atrial fibrillation. Its use in congestive heart failure and sinus rhythm is less certain. The margin between toxic and therapeutic doses is small. (From Martindale, The Extra Pharmacopoeia, 30th ed, p666)
A THROMBIN inhibitor which acts by binding and blocking thrombogenic activity and the prevention of thrombus formation. It is used to reduce the risk of stroke and systemic EMBOLISM in patients with nonvalvular atrial fibrillation.
A morpholine and thiophene derivative that functions as a FACTOR XA INHIBITOR and is used in the treatment and prevention of DEEP-VEIN THROMBOSIS and PULMONARY EMBOLISM. It is also used for the prevention of STROKE and systemic embolization in patients with non-valvular ATRIAL FIBRILLATION, and for the prevention of atherothrombotic events in patients after an ACUTE CORONARY SYNDROME.
Pharmacy is the science and technique of preparing as well as dispensing drugs and medicines. It is a health profession that links health sciences with chemical sciences and aims to ensure the safe and effective use of pharmaceutical drugs. The scope of...
Stroke - Cerebrovascular Disease (CVA)
A stroke is a serious medical condition that occurs when the blood supply to part of the brain is cut off. Strokes are a medical emergency and prompt treatment is essential because the sooner a person receives treatment for a stroke, the less damage is ...