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Regional differences in the recovery course of tachycardia-induced changes of atrial electrophysiological properties.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lee, Sanghong. Lin, Fay Y. Cheng, Jun Jack Kuan, Poo Hung, Chi Ren Chang, Michael D. Chen, S. A. |
| Copyright Year | 1999 |
| Abstract | BACKGROUND Regional differences in recovery of tachycardia-induced changes of atrial electrophysiological properties have not been well studied. METHODS AND RESULTS In the control group (5 dogs), atrial effective refractory period (AERP) and inducibility of atrial fibrillation (AF) were assessed before and every 4 hours for 48 hours after complete atrioventricular junction (AVJ) ablation with 8-week VVI pacing. In experimental group 1 (15 dogs), AERP and inducibility of AF were assessed before and after complete AVJ ablation with 8-week rapid right atrial (RA) pacing (780 bpm) and VVI pacing. In experimental group 2 (7 dogs), AERP and inducibility of AF were assessed before and after 8-week rapid left atrial (LA) pacing and VVI pacing. AERP and inducibility and duration of AF were obtained from 7 epicardial sites. In the control group, atrial electrophysiological properties obtained immediately and during 48-hour measurements after pacing did not show any change. In the 2 experimental groups, recovery of atrial electrophysiological properties included a progressive recovery of AERP shortening, recovery of AERP maladaptation, and decrease of duration and episodes of reinduced AF. However, recovery of shortening and maladaptation of AERP and inducibility of AF was slower at the LA than at the RA and Bachmann's bundle. CONCLUSIONS The LA had a slower recovery of tachycardia-induced changes of atrial electrophysiological properties, and this might play a critical role in initiation of AF. |
| Starting Page | 275 |
| Ending Page | 289 |
| Page Count | 15 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://circ.ahajournals.org/content/circulationaha/99/9/1255.full.pdf?download=true |
| Alternate Webpage(s) | http://circ.ahajournals.org/content/circulationaha/99/9/1255.full.pdf |
| PubMed reference number | 10069796v1 |
| Volume Number | 99 |
| Issue Number | 9 |
| Journal | Circulation |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Atrial Fibrillation Atrioventricular junction Canis familiaris Heart Atrium Tachycardia Ventricular Fibrillation |
| Content Type | Text |
| Resource Type | Article |
