1. Site of origin. They are either ventricular or supraventricular. Supraventricular ectopics may be subclassified into either: (a) atrial (originating in the atria) or (b) junctional or nodal (originating in the AV node or bundle of His). 2. Timing. Ectopic complexes that occur before the next normal complex would have been due are termed premature, and those that occur following a pause such ...

Speckle tracking echocardiography (STE) is an imaging technique applied to the analysis of left atrial function. STE provides a non-Doppler, angle-independent and objective quantification of left atrial myocardial deformation. Data regarding feasibility, accuracy and clinical applications of left atrial strain are rapidly gathering. This review describes the fundamental concepts of left atrial ...

QUESTIONS Atrial ectopic tachycardia (AET) may be difficult to diagnose in neonates and treatment can be complex especially in case of severe heart failure. This study addresses the clinical recognition and drug therapy of AET in neonates. METHODS Retrospective chart and database review of neonates diagnosed with AET between 1994 and 2002. RESULTS AET was diagnosed in 19 neonates at a media...

VENTRICULAR FUSION, summation or combination beats occur when two separate pacemakers compete for control of the ventricles. The usual pair of pacemakers are the sinoatrial node and an ectopic ventricular focus; but any pair of pacemakers, whose impulses invade the ventricular myocardium more or less simultaneously but at different points, can produce fusion beats. An ectopic atrial focus or th...

atrial fibrillation during vagal nerve stimulation in the canine heart: restudying the Moe hypothesis. J Cardiovasc Electrophysiol 2013;24:328–35. 14. Haissaguerre M, Jais P, Shah DC, Takahashi A, Hocini M, Quiniou G et al. Spontaneous initiation of atrial fibrillation by ectopic beats originating in the pulmonary veins. N Engl J Med 1998;339:659–66. 15. Sahadevan J, Ryu K, Peltz L, Khrestian C...

conclusions: catheter ablation of flutter circuit will not prevent later manifestation of af in 16% of the patients undergoing catheter ablation of the typical afl. bmi was the only independent predictor of af following catheter ablation of the typical afl. objectives; to determine long-term incidence and predictors of af after catheter ablation of typical afl. material and methods: between mar...

A cosine-function-based approximation method is proposed to reconstruct atrial fibrillatory wave in QRST intervals for estimating dominant frequency of atrial fibrillation (AF) using single-lead ECG. It is hypothesized that atrial fibrillatory waves in two adjacent QRST intervals can be approached by a cosine function and direct component. As harmonics of dominant frequency are neglected, the d...

15. Gutgesell HP, Gillette PC, McNamara DG: The response of the sinoatrial node to rapid atrial stimulation. Pediat Res 8: 350, 1974 16. Gillette PC, Mullins CE: Atrioventricular conduction in children: Response to rapid atrial stimulation and premature atrial stimulation. Cardiovasc Dis 2: 41, 1975 17. Godman MJ, Roberts NK, Izukawa T: Late postoperative conduction disturbances after repair of...

Dengue fever is a viral infection transmitted by the mosquito, Aedes aegypti. Cardiac rhythm disorders, such as atrioventricular blocks and ventricular ectopic beats, appear during infection and are attributed to viral myocarditis. However, supraventricular arrhythmias have not been reported. We present a case of acute atrial fibrillation, with a rapid ventricular rate, successfully treated wit...

A woman underwent bilateral lung transplantation for pulmonary fibrosis in June of 2013. The early postoperative period was complicated by continuous atrial arrhythmias that proved unresponsive to antiarrhythmic agents (propafenon and bisoprolol). Therefore, in February 2014, we performed an electrophysiological study after adequate antibiotic and antimycotic prophylaxis. During the procedure, ...