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CorSalud
versión On-line ISSN 2078-7170
Resumen
CARMONA PUERTA, Raimundo et al. P wave duration in the 12 leads of the electrocardiogram and its relationship with interatrial conduction time in patients with paroxysmal supraventricular tachycardias. CorSalud [online]. 2020, vol.12, n.3, pp. 247-253. Epub 01-Sep-2020. ISSN 2078-7170.
Introduction:
Although some studies relate P wave parameters to different atrial conduction times, they do not consider each electrocardiogram lead separately.
Objective:
To determine the duration of P wave (Pdur) in the 12 leads of the electrocardiogram and relate it to the interatrial conduction time.
Method:
We conducted a cross-sectional study in 153 adult patients with confirmed diagnosis of atrioventricular nodal reentry tachycardia (AVNRT) or accessory pathways by invasive electrophysiological study.
Results:
When comparing the Pdur between arrhythmic substrates by each lead, no significant differences were found, except for V6. In leads II, III, aVR, aVF, V1 and V3-V6, Pdur was correlated with the interatrial conduction time in both arrhythmic substrates. In our multivariate analysis, the Pdur was an independent predictor of interatrial conduction times ≥ 95 percentile in inferior wall leads and in V3, V5 and V6. High values of the area under the receiver operating characteristic curve were observed in II (0.950; p<0.001), III (0.850; p<0.001) and V5 (0.891; p<0.001) leads.
Conclusions:
The Pdur showed no difference by leads when comparing cases with AVNRT and accessory pathways, except for V6. Most of the leads were correlated with the interatrial conduction time; Pdur was an independent predictor of interatrial conduction times ≥ 95 percentile. Lead II has the greatest discriminatory ability to find prolonged values of interatrial conduction time.
Palabras clave : P wave duration; Electrocardiogram; Interatrial conduction time; Electrophysiological study; Atrioventricular nodal reentry tachycardia; Accessory pathways.