Linked Life Data

6794492

Source:http://linkedlifedata.com/resource/pubmed/id/6794492

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1981-12-21
pubmed:abstractText
Splitting of the His potential (H) in sinus rhythm is generally considered to be pathological but its significance during programmed atrial stimulation is not clear. This phenomenon was observed in 10 out of 53 patients aged between 19 and 45 years (average 31.8 years) not suspected of having paroxysmal intranodal block (asymptomatic, sinus rhythm without bundle branch block). Under basal conditions the H and the HV interval (35 to 50 ms; average 41 ms) were normal. Split H was observed with pacing periods of 680 to 885 ms (average 754 ms) and H1 H2 intervals of 325 to 450 ms (average 395 ms). The maximal interval between the split potentials ranged from 80 to 130 ms (average 100 ms). Splitting disappeared at the shortest periods when variable pacing cycles were used. The response to regular atrial pacing up to 150 bpm (10 cases) and to Ajmaline (1 mg/Kg) (4 cases) was normal. All patients but one were followed up to 10 to 41 months (average 21.4 months); the clinical and ECG parameters remained stable during this period. The presence of fragmented potentials between the atrial and ventricular complexes during programmed atrial stimulation may pose a difficult diagnosis problem, especially with respect to delayed atrial potentials. Splitting of the H is generally attributed to dispersion of the depolarisation wave front in the His bundle due to the persistence of the functional refractory state. Other mechanisms, especially longitudinal dissociation of the His bundle, may be discussed. From a prognostic point of view, this finding does not seem to carry more serious implications than simple lengthening of the HV interval or intranodal conduction delay, phenomena usually considered to be non-pathological.
pubmed:language
fre
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0003-9683
pubmed:author
pubmed:issnType
Print
pubmed:volume
74
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
705-17
pubmed:dateRevised
2009-2-13
pubmed:meshHeading
pubmed:year
1981
pubmed:articleTitle
[Fragmenting of the His potential after atrial stimulation].
pubmed:publicationType
Journal Article, English Abstract