Linked Life Data

1130270

Source:http://linkedlifedata.com/resource/pubmed/id/1130270

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1975-7-20
pubmed:abstractText
In 15 patients with left bundle branch block (LBBB), atrial (A), His bundle (H), and ventricular (V) electrograms were recorded. Successively more premature atrial depolarizations were introduced via a catheter in the right antrium. In eight patients, the ventricular specialized conducting system (VSCS) was the most refractory portion of the entire atrioventricular conducting system (AVCS) and A-V conduction, which had been occurring via the right bundle branch (RBB), failed below the His bundle as the effective refractory period (ERP) of the VSCS was reached. In two of these eight patients, after the ERP of the VSCS was exceeded, further shortening of the H1-H2 interval (by 40 to 50 msec.) resulted in an unexpected resumption of A-V conduction, but with markedly prolonged H-V intervals (160 to 230 msec.). This demonstrates that differential refractoriness exists within the RBB of these patients. A zone of maximal refractoriness was initially encountered within the RBB when the premature impulse first blocked below the His bundle. In relative terms, this zone was distal to a more proximal area of the RBB where, with further shortening of the H1-H2 interval, sufficient conduction delay occurred to permit recovery of excitability distally and the resumption of A-V conduction.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0002-8703
pubmed:author
pubmed:issnType
Print
pubmed:volume
89
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
779-84
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1975
pubmed:articleTitle
A demonstration of differential refractoriness within a single fascicle of the human ventricular specialized conduction system.
pubmed:publicationType
Journal Article