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Tytuł oryginału:
Echocardiographic evaluation of regional left atrial function after rapid atrial pacing.
Autorzy:
Kozelj
Mirta,
Zupan
Igor,
Butinar
Janos,
Seliskar
Alenka,
Rakovec
Peter
Źródło:
Cell. Mol. Biol. Lett. 2002: 7 (2) s.371-373, tab., bibliogr. 6 poz. - Międzynarodowa konferencja pt. Nauki przyrodnicze Gozd Martuljek 22-26.09. 2001 - Cz. 1 mater. konferencyjnych zamieszczono w nr 1/2002
Sygnatura GBL:
306,513
Hasła klasyfikacyjne GBL:
kardiologia
Typ dokumentu:
praca związana ze zjazdem
praca doświadczalna
tytuł obcojęzyczny
Wskaźnik treści:
zwierzęta
psy
Streszczenie angielskie:
Rapid regular atrial pacing (RAP) produces changes in atrial function similar to those caused by atrial fibrillation in animal models. Left atrial appendage (LAA) function represents regional atrial function. The aim of our study was to investigate the influence of RAP on left atrial regional function and to evaluate the reversibility of changes after terminationtermination of pacing in a canine model. Eight dogs were subjected to RAP (400 bpm) for 16 days. Transesophageal echocardiography was performed at baseline, immediately after RAP and 4 weeks after the terminationtermination of RAP. The LAA peak late emptying velocity (LAA-E) and filling wave (LAA-f) were measured. LAA-E velocities were significantly reduced and filling wave velocities (LAA-f) were significantly less negative after RAP compared with the baselline values. Four weeks after terminationtermination of pacing, the LAA-E and LAA-f velocities were normal. RAP results in impaired regional atrial systolic and diastolic function. The changes were completely reversible 4 weeks after terminationtermination of pacing. These results suggest that the LAA is mechanically stunned after RAP.
2/2
Tytuł oryginału:
Impaired sinus node function and global atrial conduction time after high rate atrial pacing in dogs.
Autorzy:
Zupan
Igor,
Kozelj
Mirta,
Butinar
Janos,
Rakovec
Peter
Źródło:
Cell. Mol. Biol. Lett. 2002: 7 (2) s.383-384, tab., bibliogr. 4 poz. - Międzynarodowa konferencja pt. Nauki przyrodnicze Gozd Martuljek 22-26.09. 2001 - Cz. 1 mater. konferencyjnych zamieszczono w nr 1/2002
Sygnatura GBL:
306,513
Hasła klasyfikacyjne GBL:
kardiologia
Typ dokumentu:
praca związana ze zjazdem
praca doświadczalna
tytuł obcojęzyczny
Wskaźnik treści:
zwierzęta
psy
Streszczenie angielskie:
In animal and human studies, it has been shown that atrial fibrillation shortens the atrial refractory period and impairs its rate adaptation. The objective of this study was to evaluate the effects of high-rate pacing on sinus node function and intra-atrial conduction. Eight dogs were subjected to rapid atrial pacing (AP) at 400 bpm for 16 days. Sinus node recovery time (SNRT) and P-wave duration were measured at baseline, immediately after AP and four weeks after the termination of AP. SNRT immediately after AP was significantly prolonged at all pacing rates compared to the baseline values. P-wave duration was significantly longer after AP relative to the baseline values. All the variables were completely reversible four after the termination of pacing. Rapid AP induces sinus node dysfunction and prolongs the intra-atrial conduction time. IT is possible that the electrical remodelling extends to the sinus node as well.
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