Retrograde conduction in complete heart block.
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چکیده
منابع مشابه
Retrograde conduction in complete heart block.
In complete heart block, absolute independence between atrial and ventricular activity does not always occur. Several mechanisms may be postulated to explain this phenomenon. One is incomplete atrio-ventricular block; another is atrio-ventricular synchronization and accrochage (Marriott, 1956; Schubart, Marriott, and Gorten, 1958; Ettinger, 1965). A third possibility rarely considered is unidir...
متن کاملConcealed retrograde conduction in complete atrioventricular block.
INCOMPLETE TRANSMISSION of impulses across the atrioventricular (A-V) junction has held a special fascination for many investigators.'14 Varied investigational techniques including venous pulse waves, standard electrocardiograms, and direct catheter electrode recordings from the cardiac chambers have been used to further the understanding of retrograde transmission of impulses into the A-V junc...
متن کاملStudy of retrograde conduction in complete heart block using His bundle recordings.
no H potential or by a prolonged AH interval, indicating concealed retrograde penetration of the His bundle. Thefact that retrograde conductionaffectedanterograde conduction indicates that the anterogradeandretrograde pathways are not totally independent. Atropine significantly improved retrograde conduction; this suggests that the retrograde conduction occurs through the conduction system in a...
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Background: Potassium, as an extracellular ion, plays an important role in the electrophysiologic function of the myocardium and any change in extracellular concentration of this ion might have a marked impression upon myocyte electrophysiologic gain. High serum potassium levels are thought to impair pulse conduction in Purkinje fibers and ventricles more than that in the Atrio...
متن کاملRetrograde atrial conduction with complete heart block following implantation of an internal ventricular pacemaker.
54-YEAR-OLD WHITE MAN WAS ADA mitted to the hospital because of Morgagni-Adams-Stokes attacks of ten months duration. As a child, the patient had frequent episodes of epistaxis and pharyngitis. At age 34, he was rejected for military service because of a "heart murmur." The Morgagni-Adams-Stokes episodes increased in frequency and severity, and one week prior to admission, several episodes of s...
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ژورنال
عنوان ژورنال: Heart
سال: 1967
ISSN: 1355-6037
DOI: 10.1136/hrt.29.4.553