Atrial premature depolarization-induced changes in QRS and T wave morphology on resting electrocardiograms in horsesReportar como inadecuado




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(2016)JOURNAL OF VETERINARY INTERNAL MEDICINE.30(4).p.1253-1259 Mark abstract Background : The electrocardiographic differentiation between atrial (APDs) and ventricular (VPDs) premature depolarizations is important. P wave prematurity and normal QRS and T wave morphology generally are used as discriminating criteria for APDs. Hypothesis/Objectives : The aim of this study was to determine whether P, Q, R, S, and T wave amplitude, PQ interval, QRS and P wave duration and P and T wave morphology differ between APDs and sinus beats. To determine the relationship between the RR coupling interval and the change in S wave amplitude between sinus beats and APDs. Methods : Case-control study. From a modified base-apex configuration of 30 horses with APDs at rest, sinus beat and APD associated preceding RR interval, P, PQ and QRS duration and P, R, S, and T wave amplitudes were measured. Linear mixed models and logistic regression were used to determine the effect of APDs on the ECG variables studied. Results : In comparison to sinus beats, APDs were associated with a significant (P < .001) change in P amplitude (-0.03 0.01 mV) and increase in S (0.20 +/- 0.02 mV) and T (0.08 +/- 0.03 mV) amplitude. PQ (-20.3 +/- 5.2 ms) and RR (-519 +/- 14 ms) interval and P duration (-21.1 +/- 3.0 ms) decreased (P < .001). APDs were significantly associated with a singular positive P wave (OR: 11.0, P < .001) and were more likely to have a monophasic positive T wave (OR: 9.2, P < .001). A smaller RR coupling interval was associated with an increased relative difference in S amplitude (P < .01). Conclusions : Atrial premature depolarizations may lead to changes in QRS and T wave morphology. Knowledge of these changes is important to avoid interpreting certain APDs as VPDs.

Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-8161948



Autor: Barbara Broux , Dominique De Clercq , Annelies Decloedt , Nicky Van Der Vekens, Tinne Verheyen , Sofie Ven , Bart Pardon and Gunth

Fuente: https://biblio.ugent.be/publication/8161948



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