![]() ![]() The results of all recordings will be available for study team after 3, 6 and 12 months after ablation, at the time when concurrent Holter ECG recordings will be analyzed. ![]() Analysis will be performed on a daily basis by an experienced ECG technician, not directly involved in patient's recruitment and treatment. After recording, ECG will be transmitted using Bluetooth to patient's smartphone and then transmitted to the central station where they will be stored and analyzed. The duration of recording may vary from 30 seconds to 3 minutes, however, only 30-second recordings will be used in the present study. In order to record ECG, the device is activated by a patient and attached to the thorax, at the area of sternum. ![]() This device enables recording of 30 seconds of 6-channel ECG (I, II, III, aVR, aVL, aVF) from 4 metal electrodes build in the recorder. The number of 50 patients has been chosen based on the assumption that Holter ECG will detect AF recurrence in 15% of patients and daily transmission will detect AF recurrence in 38% patients (alfa error = 0.05 and beta error = 0.2).ĭaily ECG recordings and transmissions will be performed using the HR-2000 recorder (ISTEL, Poland). The AF detection will be performed using two recording methods in each patient. Only patient capable of maintain ISTEL recorder and transmitting ECG will be enrolled in the study (1-2 day after catheter ablation for AF). The study group will consists of 50 consecutive patients undergoing AF ablation in the investigator's center. Hypothesis: daily ECG recordings have significantly higher yield in AF detection than repeated 7-day Holter ECG. 7-day Holter ECG may be as valuable as daily ECG transmissions, remain unanswered.Īim: to compare daily ECG transmissions with repeated 7-day Holter ECG in detecting AF episodes following AF ablation. Such questions as whether once-a-day ECG transmission is enough and whether longer i.e. However, the optimal mode of monitoring is not known. It seems that frequent, short ECG recordings have more diagnostic yield than 24-hour ECG monitoring, even when performed monthly, or standard care with recording ECG only when symptoms suggesting AF occur. ![]() In summary, data on the optimal type of ECG monitoring after AF ablation are scarce. In these studies, short ECG recordings performer once or twice daily detected the highest number of AF episodes. Only a few studies documented the usefulness of this method in detecting silent AF in a high-risk population, however, the value of short but frequent ECG recordings after AF ablation has not yet been established. Recently, several types of external ECG recorders have been introduced, enabling good quality frequent ECG recordings and transmission via mobile phones. Using this method, asymptomatic AF episodes occurring between Holter ECG recordings are missed. The most frequently used approach is periodic 1-7 day Holter ECG monitoring, usually performed 3, 6 and 12 months after the procedure and additional standard ECG recordings when symptoms occur. However, such devices for long-term ECG monitoring as implantable loop recorders are expensive whereas external ECG monitoring is not well tolerated over a period longer than one month. It has been well documented that the more frequent and/or longer ECG recording the more the AF recurrences are detected. The symptom-based evaluation is not accurate because many AF episodes are asymptomatic. The optimal method for the assessment of efficacy of ablation for atrial fibrillation (AF) has not yet been established.
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