Sinus Bradycardia and Sinus Pauses Immediately after Electrical Cardioversion of Persistent Atrial FibrillationWhat Do They Mean?
2013 (English)In: Annals of Noninvasive Electrocardiology, ISSN 1082-720X, E-ISSN 1542-474X, Vol. 18, no 3, 281-287 p.Article in journal (Refereed) Published
Background To determine the role of sinus bradyarrhythmia (SB) immediately after electrical cardioversion of persistent atrial fibrillation (AF) on the short-term recurrence rate and long-term pacemaker need and all-cause mortality. Methods SB defined as sinus bradycardia (sinus rate <40 bpm for 2 consecutive cycles) and/or sinus pauses (>2 s), were recorded during 5 minutes immediately after successful DC cardioversion in 140 consecutive patients with persistent AF. Results SB was observed during the first minute of SR in 31 patients (22%). Sinus bradycardia was present in 27 patients, sinus pauses in 16 (>3 s in 10) patients, and both in 12 patients. Compared to patients without SB, the mean heart rate during the first minute after cardioversion was lower, 57 +/- 13 versus 63 +/- 11 bpm; P < 0.05, while the mean heart rates during the subsequent 4 minutes were not statistically significantly different. The AF recurrence rates were not significantly different at 1 week (45% vs. 40%), or at 3 months (68% vs. 53%) in patients with or without SB. After a mean follow-up of 86 +/- 6 months the pacemaker implantation rate was 10% versus 11% (NS) and an all-cause mortality of 26 versus 18% (NS). Conclusions SB immediately after electrical cardioversion of persistent AF had no significant impact on the 3-month AF recurrence rate, the long-term need for pacemaker or all-cause mortality.
Place, publisher, year, edition, pages
2013. Vol. 18, no 3, 281-287 p.
atrial fibrillation, sinus bradycardia, cardioversion, sick sinus syndrome
Cardiac and Cardiovascular Systems
IdentifiersURN: urn:nbn:se:oru:diva-56715DOI: 10.1111/anec.12033ISI: 000319666000009PubMedID: 23714087OAI: oai:DiVA.org:oru-56715DiVA: diva2:1083841