Electrocardiogram (ECG) analysis is a common noninvasive technique used for diagnosis of cardiac disease in the clinical and research branches of veterinary medicine. Accurate analysis of P-wave duration, amplitude, and morphology is crucial to identification of morphologic and functional changes of the atria. The published accepted maximal normal value for P-wave duration in the dog is < or = 40 milliseconds. We looked at P-wave duration in ECG obtained as part of routine quarantine health screening over a period of 1 year in 364 clinically normal hounds weighing 13 to 35 kg. The dogs were neither anesthetized nor sedated and were placed in standard position. P-wave duration was classically determined from the lead-II recording. Mean P-wave duration for all dogs (44.9 +/- 6.1 milliseconds) was greater than published accepted normal values for the dog. There was a significant difference in mean P-wave duration by body weight (P < 0.001); dogs weighing > or = 20 kg had longer mean P-wave durations than dogs weighing < 20 kg (45.3 and 41.6 milliseconds respectively). There were also significant differences in mean P-wave duration by sex (P < 0.01), with a greater mean duration for females (45.4 milliseconds) than for males (43.8 milliseconds). All other ECG parameters were within published accepted normal values. A P-wave of prolonged duration leads to a diagnosis of abnormalities in cardiac morphology and/or function. Published accepted normal values for P-wave duration, at least for a clinically normal hound population, appear to be shorter than the true normal values. An error in published accepted normal standards may lead to overdiagnosis of cardiac abnormalities, as well as to erroneous results in cardiovascular studies. Therefore we recommend that the standard for P-wave duration be increased above the currently accepted standard of < or = 40 milliseconds.
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J Electrocardiol
January 2025
Department of Cardiology, University Hospitals of Leicester NHS Trust, Glenfield Hospital, Leicester, UK; Department of Cardiovascular Sciences, Clinical Science Wing, University of Leicester, Glenfield Hospital, Leicester, UK; National Institute for Health Research Leicester Research Biomedical Centre, Leicester, UK.
Background: Pulmonary vein isolation (PVI) for paroxysmal atrial fibrillation (PAF) can be performed using one-shot cryoballoon ablation (cryo) or point-by-point radiofrequency ablation (RF). This study compares the changes in P-wave parameters between both ablation methods.
Methods: This single-centre retrospective study included contact force RF and second-generation cryo for PAF between 2018 and 2019.
Ann Noninvasive Electrocardiol
January 2025
Department of Cardiology, University Hospitals of Leicester NHS Trust, Glenfield Hospital, Leicester, UK.
Background: Pulmonary vein isolation (PVI) is the most promising management method for paroxysmal atrial fibrillation (PAF). The P wave in the electrocardiogram (ECG) represents atrial depolarization. This study aims to correlate P-wave parameters after PVI with outcomes.
View Article and Find Full Text PDFSci Rep
December 2024
Department of Physiology, School of Medicine, University of Louisville, Louisville, KY, USA.
Background -Smoking is associated with arrhythmia and sudden cardiac death, but the biological mechanisms remain unclear. In electrocardiogram (ECG) recordings abnormal durations of ventricular repolarization (QT interval), atrial depolarization (P wave), and atrioventricular depolarization (PR interval and segment), predict cardiac arrhythmia and mortality. Previous analyses of the National Health and Nutrition Examination Survey (NHANES) database for associations between smoking and ECG abnormalities were incomplete.
View Article and Find Full Text PDFJ Electrocardiol
December 2024
Department of Chest Diseases, Faculty of Medicine, Çanakkale Onsekiz Mart University, Canakkale, Turkey.
Background: Chronic Obstructive Pulmonary Disease (COPD) is associated with left atrial (LA) dyfunction, which may contribute to adverse cardiovascular outcomes. This study investigates the predictive value of lately identified morphology-voltage-P wave duration electrocardiography (MVP ECG) score for detecting early LA dysfunction in COPD patients.
Methods: In this cross-sectional study, 101 COPD patients were enrolled.
Pacing Clin Electrophysiol
January 2025
Department of Cardiology, University Hospitals of Leicester NHS Trust, Glenfield Hospital, Leicester, UK.
Background: Pulmonary vein isolation (PVI) has been established as an effective management option for symptomatic paroxysmal atrial fibrillation (PAF). We aimed to explore the role of P-wave parameters in a 12-lead electrocardiogram (ECG) in predicting the success of repeat PAF ablation.
Methods: We enrolled consecutive patients who underwent a second AF ablation procedure for PAF in a UK tertiary center after an index ablation conducted between 2018 and 2019 and a repeat ablation up to 2021.
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