EurekaMag.com logo
+ Site Statistics
References:
48,253,228
Abstracts:
22,798,842
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Differences in the determinants of overdrive suppression between sinus rhythm and slow atrioventricular junctional rhythm


, : Differences in the determinants of overdrive suppression between sinus rhythm and slow atrioventricular junctional rhythm. Circulation Research 57(1): 182-191

Sinus node recovery time was compared to the recovery time of a slow atrioventricular junctional rhythm in each of the same seven pentobarbital anesthetized dogs. Recovery time and the first five cardiac cycles were examined after pacing atria and ventricles for 20, 40, and 60 seconds at four or more pacing cycle lengths. Data relating recovery times and return to control conditions to prepacing cycle length, pacing cycle length, duration of pacing, site of pacing, and origin of rhythms were analyzed by covariance analysis. From the analyses, the relative contribution of the determinants are: the prepacing cycle length 73%, the site of pacing 3.5%, the pacing cycle length 2%, and the interaction of the site of pacing and pacing cycle length 1% for sinus node recovery time; and for slow atrioventricular junctional rhythm recovery time, the duration of pacing 40%, the interactions between the duration of pacing and the pacing cycle length 27%, and the prepacing cycle length 9%. A modified exponential decay model predicted 8 beats for return to prepacing conditions during sinus rhythm and 66-100 beats during atrioventricular junctional rhythm. We conclude that the single most important determinant of sinus node recovery time is the prepacing cycle length. Pacing cycle length and site of pacing have a significant but small influence on sinus node recovery time and duration of pacing, beyond 20 seconds, has no significant influence. In contrast, duration of pacing is the most important determinant of slow atrioventricular junctional recovery time. Another major determinant of slow atrioventricular junctional recovery time is the interactions between pacing cycle length and duration of pacing. Prepacing cycle length has a minor influence, and site of pacing has no influence, on slow atrioventricular junctional recovery time.

(PDF same-day service: $19.90)

Order PDF Full Text

Close
Close

Click here to order any other PDF Full Text


Accession: 005151197

PMID: 4006100

DOI: 10.1161/01.RES.57.1.182

PDF Full Text: Submit


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Other references

Mundo Elias, P., 1988: Palynology of some honeys imported from Argentina. Results of pollen grain analyses of 15 Argentinian honeys are presented. The content of Eucalyptus sp. pollen was high (72-95%) in 4 honeys, and it was over 45% in 3 others. Pollens from plants in the Compositae, Cruciferae and Leguminosae were al...

Ball, J. A., 2006: Chicken production in Europe - where do we go from here. Chicken production in Europe continues to grow, but the growth is coming from new EU member states and Eastern Europe, not the established producers like France. Imports from Asia and Brazil are also taking an increasing share of the growing furth...

Beaumont, G. de., 1962: Un crane de Didelphidae des Phosphorites du Quercy. Eclogae Geologicae Helvetiae, 55: 683-688

Gomma, M. A. M.; Shaheen, A. M. A., 1995: Heterosis, inbreeding depression, heritability and type of gene action in two intra-barbadense cotton crosses. Information on heritability, heterosis, genetic variance and inbreeding depression is derived from data on 6 yield components and 5 earliness characters in 6 populations (P1, P2, F1, F2, BC1 and BC2) of the cotton (Gossypium barbadense) crosses Gi...

Laird, Sarah A.; Lisinge, Estherine E., 2002: Protected area research policies: developing a basis for equity and accountability. Unknown

Halasz, K., 1968: Some characteristic of the seed sorghum stored in silos. Hegari with moisture contents of 17.2-28.4% was ensiled in trials during 1965-7. 40% formaldehyde was applied in 1 treatment. On reopening, 0.11-0.81% lactic acid, 0.04-0.26% acetic acid and 0-0.005% butyric acid were detected. Formaldehyde caused...

Arnold Ralph, 1905: Gold placers of the coast of Washington. U S

Gellrich, N.C.; Schramm, A.; Gutwald, R.; Schoen, R.; Husstedt, H.; Schmelzeisen, R., 1999: Computer assisted planning and surgery in orbital reconstruction. Lemke, H U [Editor], Vannier, M W [Editor], Inamura, K [Editor], Farman, A G [Editor] International Congress Series; Computer assisted radiology and surgery 1042

Rieu, M; Sposito, G., 1991: Fractal fragmentation, soil porosity, and soil water properties. II. Applications. The fractal model of Rieu and Sposito contains seven predictive equations that can be tested experimentally with data on aggregate characteristics and soil water properties for structured soils. However, data with which to test the model are extre...

Autkar, K. S.; Vyas, J. S.; Wanjari, K. B., 1991: Studies on chickpea-based intercropping under irrigated conditions. In irrigated trials, chickpeas intercropped with wheat, mustard [Brassica juncea], linseed or safflower in 2:2, 4:1 or 8:1 row ratios gave 3-year av. (1986-89) seed yields of 0.40-1.17 t/ha compared with 1.44 t in pure stands. The 4 intercrops gav...