Abstract | BACKGROUND: METHODS AND RESULTS: A prospective, single-center study was conducted, wherein 50 consecutive patients (mean age: 70.8 ± 8.7; 24 males) undergoing cardioversion of persistent or paroxysmal AFl or AT were randomized into two protocols of subsequent RBC shocks: 1) 10 J, 20 J, 50 J, 100 J, 200 J or 2) 20 J, 50 J, 100 J, 200 J. Initial energy was effective in 9/28 (32%) patients using Protocol 1 and in 12/22 (52%) patients using Protocol 2 (NS). In 9/12 patients with pacemakers, energy of 10 J or 20 J restored sinus or atrial-paced rhythm. Mean cumulative energy and number of shocks was 67 ± 70 J vs 64 ± 62 J (NS) and 2.0 ± 0.8 vs 1.6 ± 0.7 (p = 0.05) for both protocols, respectively. Mean successful energy was higher for AFl patients than for AT patients 66 ± 49 J vs 30 ± 19 J, p < 0.04. In approximately 25% of patients, conversion of AFl/AT into AF was observed after initial energy. CONCLUSIONS: Low energy RBC is effective in 32-52% of patients with AFl/AT. Energy of 50 J is effective in 73% of patients and should be recommended as an initial energy in regular AT. Low energy RBC may be especially indicated in patients with pacemakers.
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Authors | Sebastian Stec, Tomasz Kryński, Piotr Kułakowski |
Journal | Cardiology journal
(Cardiol J)
Vol. 18
Issue 1
Pg. 33-8
( 2011)
ISSN: 1898-018X [Electronic] Poland |
PMID | 21305483
(Publication Type: Comparative Study, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
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Topics |
- Aged
- Aged, 80 and over
- Atrial Flutter
(physiopathology, therapy)
- Chi-Square Distribution
- Electric Countershock
(adverse effects, methods)
- Female
- Humans
- Male
- Middle Aged
- Pacemaker, Artificial
- Patient Selection
- Poland
- Prospective Studies
- Tachycardia, Supraventricular
(physiopathology, therapy)
- Time Factors
- Treatment Outcome
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