P wave signal averaged ECG and chemoreflexsensitivity in paroxysmal atrial fibrillation

Long-term outcome after cardioversion of atrial fibrillation: Prediction of recurrence with P wave signal averaged ECG and chemoreflexsensitivity

“…Recording of P wave triggered P-SAECG was described previously [18]. Orthogonal X, Y and Z leads (Predictor, Kaiser Medizintechnik, Germany) were used with a specifically designed software which retained the P wave as a trigger of the averaging process.…”

“…The analysis of CHRS was described in detail in a previous publication [18]. Briefly, patients were placed for 10 min in supine position in a quiet room to reach a hemodynamic homeostasis.…”

“…The HRV was assessed by analyzing the variations of consecutive heart beats or RR intervals to measure the standard deviation of all normal RR intervals. A pathologic HRV was predefined as a HRV 30 ms [18].…”

“…Slow atrial conduction is reflected by filtered P wave duration (FPD) of the P wave triggered P wave signal averaged ECG (P-SAECG) whereas autonomic nervous system can be analysed with chemoreflexsensitivity (CHRS) [16 -18]. 0167 In paroxysmal AF is found a lower CHRS, a longer FPD and lower root mean square voltage of the last 20 ms of the P wave (RMS 20) [18]. Therefore, we evaluated in a prospective study the prediction of the methods for the recurrence of AF after EC.…”

The effects of losartan on signal-averaged P wave in patients with atrial fibrillation

“…In the present study, we examined the effects of losartan on atrial electricity by using the signal-averaged ECG of P waves [7][8][9][10].…”