Prediction of Transition to Chronic Atrial Fibrillation in Patients With Paroxysmal Atrial Fibrillation
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P wave
Paroxysmal atrial fibrillation
Objective To Provide clinical references for explaining atrial fibrillation maintaining mechanism,by analyzing the f wave and left atrial inner dimension in patients with atrial fibrillation.Methods A total of 391 cases of atrial fibrillation was collected from January 2008 to January 2011 in our hospital,then 50 cases were selected randomly from chronic atrial fibrillation and 50 cases from paroxysmal atrial fibrillation.The amplitude of f wave,timing,f-f interval and left atrial dimension,and so on,were measured,then made a statistics analysis of the results.Results The index above in the Paroxysmal atrial fibrillation group are lower than that of the persistent atrial fibrillation,except inner diameter.There were statistic differences between the two groups(P0.05).Conclusion The increase of left atrial dimension,the shorten of refractory period of atrium maybe the pathological mechanism of atrial fibrillation.
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Paroxysmal atrial fibrillation
Atrium (architecture)
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Paroxysmal atrial fibrillation
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Paroxysmal atrial fibrillation
P wave
Flutter
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Stroke
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Objective To investigate the relationship between left atrial dimension and atrial fibrillation of coronaray heart disease.Methods The coronaray heart disease patients were divided into three groups,non-atrial fibrillation(group 1),paroxysmal atrial fibrillation(group 2),atrial fibrillation(group 3).Results The rate of atrial fibrillation is increased obviously than normal left atrial dimension.Conclusion The rat of atrial fibrillation in larger left atrial dimension is higher.
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Introduction: P-wave duration (PWD) is an electrocardiographic (ECG) marker reflecting atrial conduction, and studies have shown that its prolongation is associated with atrial fibrillation.Areas covered: This review addresses the relationship between PWD and atrial fibrillation, how anatomic and physiologic changes in the atria potentiate the risk for atrial fibrillation, and how these atrial anatomic and physiologic changes relate to PWD. Other P-wave related entities, such as P-wave terminal force in V1, PR interval, and P wave axis are also addressed.Expert commentary: Atrial fibrillation is a manifestation of the underlying atrial disease. Fibrotic collagen deposition interrupts the electrical flow and thus can potentiate the transition from sinus rhythm to atrial fibrillation. PWD is an ECG parameter that provides insight into the intricacies of the atria and could be a useful marker for assessing the risk for atrial fibrillation. The main obstacle for broad utilization of PWD is that it is not routinely reported on the printout of the electrocardiogram.
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Fibrillation
PR interval
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A method of recording intensified atrial ECG (IAECG) is described. A total of 150 subjects were examined by this technique including 60 with the normal sinus rhythm and 90 with atrial fibrillation. A certain homogeneity between P atrial waves and the intensified waves of atrial fibrillation was observed over time in the same patients in the presence of prominent heterogeneity of individual types of atrial fibrillation. Characteristic features of the atrial complexes revealed in patients with atrial fibrillation may be of importance for the differential diagnosis, as well as for the assessment and prediction of therapy efficacy. They also appear to be essential in solving a number of theoretical questions concerned with the genesis of both atrial fibrillation and other heart rhythm irregularities.
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Objective To analyze the relationship between left atrial change and atrial fibrillation.Methods Fifty-four patients who had persistent atrial fibrillation in electrocardiogram and dynamic-electrocardiogram were enrolled in group A,52 patients who had paroxysmal atrial fibrillation in group B,and other 54 patients who only had P wave broaden in electrocardiogram in group C.Left atrial size was measured by ultrasoundcardiogram in all patients and the maximum P wave duration(Pmax),the minimum P wave duration(Pmin),P wave dispersion(Pdisp) were measured by 12-leads electrocardiogram in patients of group B and group C.Results The patients who had evident P incisurae and Pdisp increasing tend to suffer from fibrillation;the larger left atrium was,the higher the possibility of atrial fibrillation was,the left atrium diameter of persistent atrial fibrillation was larger than that of paroxysmal atrial fibrillation.Conclusion The patients with left atrial enlargement and Pmax and Pdisp increasing tend to suffer from atrial fibrillation.
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Paroxysmal atrial fibrillation
Atrium (architecture)
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Atrial fibrillation is a serious heart diseases, which is associated on the risk of death, and thus an early detection of atrial fibrillation is necessary. We have investigated spectral pattern of electrocardiogram in relation to atrial fibrillation. The utilized feature of electrocardiogram is RR interval. RR interval is the time interval between a two-consecutive R peaks. A series of RR intervals in a time segment is converted to a signal with a frequency domain. The frequency components are investigated to find the components which significantly associate to atrial fibrillation. A segment is defined as atrial fibrillation or normal segments by considering a defined number of atrial fibrillation RR in the segment. Using clinical data of 23 patients with atrial fibrillation, we find that the frequency components could be used to indicate atrial fibrillation.
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Fibrillation
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