Atrioventricular and intraventricular conduction

Hecht, Hans H.; Kossmann, Charles E.; Pruitt, Raymond D.; Truex, Raymond C.; Uhley, Herman N.; Watt, Thomas B.

doi:10.1016/0002-9149(73)91036-9

Cited by 169 publications

(25 citation statements)

References 52 publications

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“…All the patients were asked to describe all their routine daily activities and symptoms during the long-term moni toring in diaries. The terms and definitions related to cardiac rhythm and conduction followed the recom mendations of Hecht et al [ 15] and Robles de Medina et al [16],…”

Section: Methodsmentioning

confidence: 99%

24-Hour Electrocardiographic Study in Myotonic Dystrophy

Forsberg¹,

Andersson²,

Henriksson³

et al. 1988

Cardiology

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Thirty-eight consecutive adult patients with myotonic dystrophy were included in a study with electrocardiography at rest and 24-hour ambulatory electrocardiography. The patients were subdivided into three groups according to the severity of the disease. The prevalence of abnormal electrocardiograms at rest was 31, 50 and 100% in patients with mild, moderate and severe disease, respectively. The main characteristics observed at ambulatory electrocardiography were a high frequency of sinus bradycardia (58%) and intermittent atrioventricular block II (8 %). These bradyarrhythmias were not correlated to the severity of the disease. Sustained atrial fibrillation or flutter was found in 3 patients (8%), all with the most severe form of the disease. Ambulatory electrocardiography should be used deliberately in the evaluation of patients with myotonic dystrophy and symptoms compatible with cardiac arrhythmias.

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Section: Methodsmentioning

confidence: 99%

24-Hour Electrocardiographic Study in Myotonic Dystrophy

Forsberg¹,

Andersson²,

Henriksson³

et al. 1988

Cardiology

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“…Rather than review all morphological studies performed in this century on the A V nodal area [the early literature has been excellently reviewed by Scherf and Cohen (162)], we focus on recent studies, wh ere, despite some differences in nomenclature, there is agreement about a subdivision of the A V nodal area into several regions (8,10,11,16,19,42,55,99,103,139,145,177,182,191). It may be emphasized that only very time-consuming three-dimensional reconstructions based on serial sections give a complete picture of nodal architecture (11,101,171,177).…”

Section: Different Eell Types Within the A V Nodementioning

confidence: 99%

Morphology and electrophysiology of the mammalian atrioventricular node

Meijler

Janse

1988

Physiological Reviews

203

146

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The AV node of those mammalian species in which it has been thoroughly investigated (rabbit, ferret, and humans) consists of various cell types: transitional cells, midnodal (or typical nodal cells), lower nodal cells, and cells of the AV bundle. There are at least two inputs to the AV node, a posterior one via the crista terminalis and an anterior one via the interatrial septum, where atrial fibers gradually merge with transitional cells. The role of a possible third input from the left atrium has not been investigated. Since the transition from atrial fibers to nodal fibers is gradual, it is very difficult to define the "beginning" of the AV node, and gross measurements of AV nodal length may be misleading. Histologically, the "end" of the AV node is equally difficult to define. At the site where macroscopically the AV node ends, at the point where the AV bundle penetrates into the membranous septum, typical nodal cells intermingle with His bundle cells. A conspicuous feature, found in all species studied, is the paucity of junctional complexes, most marked in the midnodal area. The functional counterpart of this is an increased coupling resistance between nodal cells. An electrophysiological classification of the AV nodal area, based on transmembrane action potential characteristics during various imposed atrial rhythms (rapid pacing, trains of premature impulses), into AN (including ANCO and ANL), N, and NH zones has been described by various authors for the rabbit heart. In those studies in which activation patterns, transmembrane potential characteristics, and histology have been compared, a good correlation has been found between AN and transitional cells, N cells and the area where transitional cells and cells of the beginning of the AV bundle merge with midnodal cells, and NH cells and cells of the AV bundle. Dead-end pathways correspond to the posterior extension of the bundle of lower nodal cells and to anterior overlay fibers. During propagation of a normal sinus beat, activation of the AN zone accounts for at least 25% of conduction time from atrium to His bundle, the small N zone being the main source of AV nodal delay. Cycle length-dependent conduction delay is localized in the N zone. Conduction block of premature atrial impulses can occur both in the N zone and in the AN zone, depending on the degree of prematurity. Several factors determining AV nodal conduction delay have been identified.(ABSTRACT TRUNCATED AT 400 WORDS)

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“…ECG is the gold standard non-invasive test for the clinical diagnosis of cardiac arrhythmias [14] and heart block [15][16]. The use of ECG in gender determination in the young has not been previously demonstrated until inception of this study.…”

Section: Discussionmentioning

confidence: 90%

The Basis and Potentials of Ogunlade Sex Determination Electrocardiographic Score (OSDES) in Young Adults

Ogunlade

Asafa²

2015

CMR

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Abstract:The potentials of electrocardiogram (ECG) in sex determination in young adults have not been extensively explored despite the fact that ECG is one of the most frequently performed medical procedures. This study aimed at developing a simple electrocardiographic score system that could assist in sex determination in young adults. Patterns of ECG in male and female young adults were carefully analyzed and features that could be used to delineate the ECG into male and female patterns were selected as criteria for formulation of a simple scoring system called Ogunlade sex determination electrocardiographic score (OSDES).Components of OSDES were point scores in four electrocardiographic parameters; T wave configuration in V1 (1-3), ST segment in V2 or V3 (1-3), QRS rotation (1-3) and heart rate (1-3). The total minimum and maximum scores were 4 and 12 respectively. An individual with a total score of < 7 was identified as a female while an individual with a score ≥ 7 was identified a male. Thus, with OSDES, ECG can be classified into two; male pattern and female pattern for male and female respectively. This unique scoring system was tested among 474 healthy young adults (294 males and 180 females). Two hundred and eighty eight (288) of the 294 males were correctly identified by OSDES as males while 174 of the 180 females were correctly identified as females (k = 0.946, p < 0.001). The study defined male and female ECG patterns and concluded that ECG can be used to determine sex among young adult population.

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Atrioventricular and intraventricular conduction

Cited by 169 publications

References 52 publications

24-Hour Electrocardiographic Study in Myotonic Dystrophy

24-Hour Electrocardiographic Study in Myotonic Dystrophy

Morphology and electrophysiology of the mammalian atrioventricular node

The Basis and Potentials of Ogunlade Sex Determination Electrocardiographic Score (OSDES) in Young Adults

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