Structural determinants of atrial and ventricular conduction
نویسندگان
چکیده
منابع مشابه
Disparate effects of deficient expression of connexin43 on atrial and ventricular conduction: evidence for chamber-specific molecular determinants of conduction.
BACKGROUND Myocardial conduction depends on intercellular transfer of current at gap junctions. Atrial myocytes express three different gap junction channel proteins-connexin43 (Cx43), connexin45 (Cx45), and connexin40 (Cx40)-- whereas ventricular myocytes express only Cx43 and Cx45. However, the physiological roles of individual connexins are unknown. We have previously shown that mice heteroz...
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Electrical conduction is very rapid and highly anisotropic in atrial fiber bundles, such as the crista terminalis. In contrast to left ventricular myocardium in which the ratio of longitudinal to transverse conduction velocities is approximately 3, propagation velocity in the crista terminalis is approximately 10 times greater in the longitudinal than in the transverse direction. To elucidate p...
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Electrical conduction is very rapid and highly anisotropic in atrial fiber bundles, such as the crista terminalis. In contrast to left ventricular myocardium in which the ratio of longitudinal to transverse conduction velocities is =3, propagation velocity in the crista terminalis is "10 times greater in the longitudinal than in the transverse direction. To elucidate potential determinants of t...
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BACKGROUND Differentiation between aberrant ventricular conduction and ventricular ectopy during atrial fibrillation (AF) is of etiologic, prognostic, and therapeutic importance. We developed a noninvasive technique to diagnose aberrant ventricular conduction and ventricular ectopy in AF. METHODS AND RESULTS We studied the Holter ECGs of 34 patients with paroxysmal AF and 62 patients with chr...
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Aberrant ventricular conduction definition: It is a term applied to alterations in QRS contour of supraventricular beats resulting from impulse transmition during periods of physiologic refractoriness and/or depressed conductivity. The supraventricular electrical impulse is conducted abnormally through the ventricular conducting system. This results in a wide QRS complex that may be confused wi...
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ژورنال
عنوان ژورنال: Journal of Cellular and Molecular Medicine
سال: 2002
ISSN: 1582-1838,1582-4934
DOI: 10.1111/j.1582-4934.2002.tb00315.x