A 32-year-old man presented with palpitation. He was diagnosed with pulmonary sarcoidosis by lung biopsy. The electrocardiogram showed first-degree atrioventricular block and complete right bundle branch block (CRBBB). We planned to examine laboratory data, echocardiography, Holter monitoring, and gallium-67 scintigraphy. Before he went through all these exams, he developed ventricular tachycar...

A study correlating the electrocardiographic findings and the histology of the atrioventricular (AV) conduction system was carried out in 14 cases with chronic complete AV block and in 13 cases without chronic complete AV block. Patients with chronic complete AV block were divided into two groups, based on the width of the QRS complex. The QRS complexes were narrow (less than 0.12 second) in fo...

AIMS The difference between the stimulus-atrial and ventriculo-atrial intervals (SA-VA) and between the post-pacing interval and the tachycardia cycle length (PPI-TCL) during entrainment from the right ventricular apex distinguishes atrioventricular node reentrant (AVNRT) from orthodromic atrioventricular reentrant tachycardia (AVRT). We hypothesized that these features still apply when entrain...

INTRODUCTION AND OBJECTIVES The development of ablation techniques for supraventricular arrhythmias in patients with Ebstein's anomaly have led to a need for better understanding of the morphology of the triangle of Koch and the position of the atrioventricular (AV) node in this structure. METHODS The study involved 17 human hearts: 11 with Ebstein's anomaly (age range: 37 weeks' gestation to...

This paper reviews the anatomical substrates responsible for the induction and maintenance of supraventricular tachycardia and discusses the ECG findings associated with these tachycardias. The normal anatomy of the supraventricular conducting system, particularly within the atria, is complex with conduction proceeding along preferential pathway, which are in turn determined in part by the anis...

Figure 1. (Panel A) 12-lead ECG depicting high degree right bundle branch block (see text for details). (Panel B) 12-lead ECG depicting the “Chiale” maneuver Right apical ventricular pacing during with timed A-V intervals in the fused QRS complexes. Black arrows show classic type 1 Brugada ECG pattern. Upon cessation of pacing, high-degree right bundle branch block reappears (white arrows). ECG...

The course of the atrioventricular conducting tissues was studied in IO hearts having ventricular septal defects. Seven of the defects were in the membranous portion of the septum, and in these hearts the common atrioventricular bundle passed down the posterior edge of the defect and bifurcated on its inferior border. In 3 of these specimens the bundle deviated to the left side of the septum be...

an excellent paper1 on the operative treatment of spasmodic torticollis, give the following-summary of conclusions :? i. Palliative treatment, whether by drugs, apparatus, or electricity, will rarely prove successful in well-established spasmodic torticollis.

Critical pathways, developed for utilisation in the health sector, are tools that are increasingly being used to implement co-ordinated patient care. The introduction of critical pathways results in planned progress through an episode of care, whilst optimising health outcomes and minimising resource utilisation. The advantages of implementing critical pathways are increasingly evident, with re...

Four pacing maneuvers have been proposed to validate an anterograde accessory pathway potential (APP): (1) atrial pacing to induce complete block between the atrial electrogram and the APP; (2) ventricular pacing to advance the APP without altering the timing of the atrial electrogram; (3) atrial pacing to induce complete block between the APP and the ventricular electrogram; and (4) ventricula...