BACKGROUND We aimed to analyze the results of retrograde aortic radiofrequency catheter ablation of left-sided accessory pathways in children. METHODS Between January 2010 and September 2014, 25 children who underwent left-sided accessory pathway ablation with a retrograde aortic approach were evaluated retrospectively. RESULTS The mean age of the patients was 11.09±3.71 years. Seventeen pa...

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Resumption of dormant accessory pathway conduction ...

The ECG during peak exercise shows sinus tachycardia of 167 beats/min with pre-excitation and ischaemic-like STsegment depression in V3–V6 (Fig. 1a in the Question). The ECG in the recovery phase shows disappearance of pre-excitation with normalisation of ST segments at a heart rate of 145 beats/min (Fig. 1b in the Question). Pre-excitation reoccurred at a heart rate of 101 beats/min. The basel...

Thallium-201 scintigraphy of the exercised myocardium was performed in 70 male patients admitted for coronary arteriography and left-ventricular angiography. Left ventricular scintigrams were collected in left lateral, left anterior oblique (65 degrees, 45 degrees, and 25 degrees), and anterior views, and the images were divided into eight segments: apical, anteroseptal, anterior, antero-latera...

We analyzed the effect of functional fascicular block (FFB) on ventriculoatrial conduction time (VACT) during orthodromic tachycardia (OT) in 32 patients with single accessory pathway (AP) of the Kent bundle type. The location of AP was left free wall (LFW-AP) in 21 patients, left posteroseptal in 6, right free wall in 2, and right anteroseptal in 3. FFB either alone or in combination with func...

BACKGROUND The patterns of activation of the human left atrium (LA), how they relate to atrial myocardial architecture, and their role in arrhythmogenesis remain largely unknown. METHODS AND RESULTS Left atrial endocardial activation was mapped in 19 patients with a percutaneous noncontact mapping system. Earliest endocardial breakthrough during sinus rhythm (SR) occurred more frequently in t...

T HE most widely accepted electrocardiographic classification of myocardial infarction is that proposed by Wilson and his associates.' They classified myocardial infarction "on the basis of the leads in which characteristic modifications of both the QRS deflections and the T complexes appear and have been given names indicative of the parts of the ventricular wall known, or thought, to be invol...

Bipolar radiofrequency catheter ablation (RFCA) strategy using two catheters may require prolonged fluoroscopy time because of challenges with positioning. Intracardiac echocardiographic images only offer limited views to help maneuver both catheters. To simultaneously visualize on the 3D mapping system for localizing target and minimizing fluoroscopy. A bipolar RFCA was set up connections grou...

Abstract Funding Acknowledgements Type of funding sources: None. Background Arrhythmia is a common extra genital pathology in pregnant. Catheter ablation without fluoroscopy demonstrated similar efficacy and safety to fluoroscopy-based procedure. However, data on pregnant population limited. Purpose To evaluate the arrhythmias substrate outcomes catheter with supraventricular tachycardia. Metho...