Papillary Muscle Arrhythmias
نویسندگان
چکیده
Technological advances during the past decade have significantly enhanced our ability to successfully map and ablate ventricular arrhythmias in patients with a structurally normal heart, as well as various forms of underlying cardiac disease. Increased recognition of the deleterious effects of ventricular arrhythmias, such as the potential of frequent premature ventricular complexes (PVCs) to induce cardiomyopathy, has increased indications for ablation. Successful outcomes of catheter ablation of ventricular arrhythmias are subject to many potential challenges and reported with variable rates of success.
منابع مشابه
Post-infarction ventricular arrhythmias originating in papillary muscles.
OBJECTIVES The aim of this study was to define the role of papillary muscles (PAPs) in post-infarction ventricular arrhythmias. BACKGROUND Papillary muscles have been implicated in arrhythmogenesis; however, their role in post-infarction ventricular arrhythmias has not been well-defined. METHODS In a series of 9 patients (age 65 +/- 9 years, ejection fraction 0.36 +/- 0.1) with post-infarct...
متن کاملPeculiar mitral valve and papillary muscle lesions induced by vagus manipulations in rabbits. An experimental model for nonrheumatic mitral regurgitation.
Peculiar lesions of mitral valves and papillary muscles developed in 50 to 80% of rabbits after clipping (N = 38), crushing (N = 15) or electrical stimulation (N = 44) of their cervical vagi. Both right and left vagus manipulations induced similar cardiac lesions. The earliest manifestation was bleeding of the mitral leaflets, which was followed by swelling and fibrosis of the papillary muscles...
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BACKGROUND Idiopathic left ventricular arrhythmias (VAs) and those caused by structural heart disease can originate from the papillary muscles, fascicles, and mitral annulus. Differentiation of these arrhythmias can be challenging because they present with a right bundle branch block morphology by electrocardiography. We sought to identify clinical, electrocardiographic, and electrophysiologica...
متن کاملValidation of a novel dark-blood delayed enhancement technique for the detection of papillary muscle scar
Background Papillary muscle scarring may result in mitral regurgitation and may be foci for ventricular arrhythmias. However, papillary muscle scarring may be difficult to detect with delayed enhancement MRI (DE-MRI) since there is often poor contrast between hyperenhanced tissue and immediately adjacent bright blood pool. We have developed a new, Flow-Independent Dark-blood DeLayed Enhancement...
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Introduction Papillary muscle involvement in acute myocardial infarction (MI) may be associated with new-onset mitral regurgitation and ventricular arrhythmias. Late gadolinium enhancement (LGE) cardiovascular magnetic resonance (CMR) imaging can detect and quantify myocardial scar. The detection of papillary muscle involvement however may be challenged by difficulties discriminating the affect...
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BACKGROUND Myocardial infarct heterogeneity indices including peri-infarct gray zone are predictors for spontaneous ventricular arrhythmias events after ICD implantation in patients with ischemic heart disease. In this study we hypothesize that the extent of peri-infarct gray zone and papillary muscle infarct scores determined by a new multi-contrast late enhancement (MCLE) method may predict a...
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