1. Low-energy intracardiac shocks during atrial fibrillation: Effects on cardiac rhythm 
Nikola Gjorgov, MD, Frank Provenier, MD, Luc Jordaens, MD 
American Heart Journal 
Volume 133, Issue 1, Pages (January 1997)
DOI: /S (97)
Copyright © 1997 Mosby, Inc. Terms and Conditions

2. Fig. 1
Usual position on anteroposterior radiograph of right atrial and coronary sinus shock catheters.
American Heart Journal  , DOI: ( /S (97) )
Copyright © 1997 Mosby, Inc. Terms and Conditions

3. Fig. 2
Left atrial size in relation to voltage conversion level. Filled squares , individual shocks.
American Heart Journal  , DOI: ( /S (97) )
Copyright © 1997 Mosby, Inc. Terms and Conditions

4. Fig. 3
Test shock level (20 V) with mean R-R intervals of all patients, from tenth to first interval before shock (arrow) and from first to tenth interval after shock.
American Heart Journal  , DOI: ( /S (97) )
Copyright © 1997 Mosby, Inc. Terms and Conditions

5. Fig. 4
Shock of 260 V synchronized with R wave in 55-year-old man resulted in ventricular pause of 1650 msec without conversion of atrial arrhythmia. Subsequent intervals are comparable to intervals before shock (paper speed, 50 mm/sec).
American Heart Journal  , DOI: ( /S (97) )
Copyright © 1997 Mosby, Inc. Terms and Conditions

6. Fig. 5
Prolongation of mean first postshock interval at 300 V level compared with other intervals and compared with 20 V level.
American Heart Journal  , DOI: ( /S (97) )
Copyright © 1997 Mosby, Inc. Terms and Conditions

7. Fig. 6
Correlation between mean noneffective first postshock R-R intervals and corresponding voltage levels.
American Heart Journal  , DOI: ( /S (97) )
Copyright © 1997 Mosby, Inc. Terms and Conditions

8. Fig. 7
Correlation between maximal recorded R-R interval (noneffective shocks) after shocks for every level. PSI , Postshock interval.
American Heart Journal  , DOI: ( /S (97) )
Copyright © 1997 Mosby, Inc. Terms and Conditions