A new method of filtering T waves to detect hidden P waves in electrocardiogram signals
Por:
Goldwasser, D, de Luna, AB, Serra, G, Elosua, R, Rodriguez, E, Guerra, JM, Alonso, C, Prat, XV
Publicada:
1 jul 2011
Resumen:
Aims A correct identification of the P wave is crucial for the diagnosis of narrow QRS tachycardias. This is sometimes difficult because atrial activity is hidden in the T wave. The aim of this study is to evaluate the usefulness of a T wave filtering technique based on wavelet transformation to identify atrial activity.
Methods and results Forty-two patients with narrow QRS tachycardias and regular atrial activity were studied. A surface electrocardiogram (ECG), intra-atrial recording, and the T wave filtering ECG were compared simultaneously to check the accuracy of the filtering system in detecting atrial activity. The sensitivity of the T wave filtering and P wave detection algorithm was 85.8% [95% confidence interval (CI): 81.2-89.4%] and the specificity was 89.4% (95% CI: 87.1-91.4%), with a global accuracy of 88.5% (95% CI: 86.5-90.3%). The expert cardiologist's accuracy in distinguishing between atrioventricular nodal reentry tachycardia and atrioventricular reentry tachycardia was 75% in the surface ECG vs. 100% in the ECG with the T wave filtering process (P < 0.01).
Conclusions T wave filtering based on wavelet transformation improves the capacity of the surface ECG to identify atrial activity in cases of regular narrow QRS supraventricular tachycardias.
Filiaciones:
Goldwasser, D:
Hosp Santa Creu & Sant Pau, Inst Catala Ciencies Cardiovasc, Barcelona 08025, Spain
de Luna, AB:
Hosp Santa Creu & Sant Pau, Inst Catala Ciencies Cardiovasc, Barcelona 08025, Spain
Serra, G:
Univ Politecn Cataluna, Barcelona, Spain
Elosua, R:
IMIM, Grp Epidemiol & Genet Cardiovasc, Barcelona, Spain
CIBER Epidemiol & Salud Publ, Barcelona, Spain
Rodriguez, E:
Hosp Santa Creu & Sant Pau, Dept Cardiol, Barcelona 08025, Spain
Guerra, JM:
Hosp Santa Creu & Sant Pau, Dept Cardiol, Barcelona 08025, Spain
Alonso, C:
Hosp Santa Creu & Sant Pau, Dept Cardiol, Barcelona 08025, Spain
Prat, XV:
Hosp Santa Creu & Sant Pau, Dept Cardiol, Barcelona 08025, Spain
Open Access
|