Nurse-driven protocol for the management and follow-up of subclinical atrial fibrillation episodes in pacemaker patients

Abstract

Abstract Background Atrial high-rate episodes (AHREs) compatible with atrial fibrillation (AF) detected in pacemakers are associated with an increased risk of stroke. Nurses trained in pacemaker (PM) follow-up can detect theses AHREs during patient’ scheduled visits and provide the best care option to the patients. Purpose To evaluate a nurse protocol applied in these patients focused on a) identifying those with AHREs and taking into account the timing of these events and their duration, and b) provide the best care and follow-up then after. Methods and Results To create our protocol, we evaluated PM patients without a previous history of AF and classified the incidence of AHREs into 3 groups: >5 minutes to 24 hours; >24 hours and patients who are in clinical AF (documented on ECG) at the time of the visit. We also evaluate the time elapsed since PM implantation (£ 3 months vs > 3 months) and the type of atrial electrode fixation (active vs passive). In a prior study we analyzed 110 patients with AHREs >5 minutes and <24 hours (56% male, age 75 ± 9 years, mean CHA2DS2VACS scores of 3.5 ± 1.5). After 24 ± 9 months, 40 patients (36.4%) presented AHREs, and CT images showed ischemic brain lesions in 26 of them (23.6%). The presence of AHREs at 3 months was more frequent in patients with a recent MP implantation (17% vs 4.5%) and with a significant relationship with the type of active fixation of the electrode. The presence of ischemic lesions on CT was related to the detection of AHREs during follow-up, but not with AHREs in the first 3 months. Therefore, we designed a dedicated protocol for follow-up in these patients (AHREs >5 minutes and <24 hours) after PM implantation with repetitive follow-up visits assessing the evolution of AHREs. In cases of >24 hours and those with ECG documented AF, Guidelines recommendations were followed. Conclusions In PM patients, the presence of AHREs might be related to serious clinical complications. On the other hand, AHREs occur regularly during the first 3 months after PM implantation, maybe related to the procedure itself and the use of active fixation for the atrial lead. AHREs in this period may not be related to major complications and individual risk should be carefully assessed before starting anticoagulation. A dedicated protocol for closer follow-up visits in these patients might help to identify those at risk and prevent clinical events.