Arrhythmias and conduction disturbanceReevaluation of the Criterion for Interatrial Block
Section snippets
Methods and Results
The design of our recently published series in which we had measured 500 consecutively numbered, otherwise unselected, ECGs of outpatients from the University of Massachusetts has been previously described.11 In brief, 12-lead ECGs at rest were recorded using 25 mm/s and 10 mm/mV standardization. The ECGs had been independently evaluated for IAB to the nearest 10 ms using the greatest P-wave duration in every appropriate lead as measured on a blinded, single read with a magnifying graticule by
Discussion
We had previously reported a 41%8 and 47%7 prevalence of IAB in 2 separate, but comparable, groups of 1,000 hospitalized patients each. We concluded that IAB could be pandemic in the general hospital population compared with other common types of conduction blocks, especially in those aged ≥60 years. In a series of community-dwelling men and women >60 years old who were enrolled in the Elder Service Plan, a model of the Program of All-inclusive Care for the Elderly (PACE), we found a similarly
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Cited by (22)
Analysis of the Association Between Electrocardiographic P-wave Characteristics and Atrial Fibrillation in the REGICOR Study
2017, Revista Espanola de CardiologiaInteratrial blocks. A separate entity from left atrial enlargement: A consensus report
2012, Journal of ElectrocardiologyCitation Excerpt :These are expressed in the electrocardiogram (ECG) by the presence of P-wave duration that equals or exceeds 120 milliseconds and presents usually a bimodal morphology, especially in leads I, II, and VL and inferior leads.2-4 Since then, there are several reports describing the ECG characteristics of different types of interatrial blocks, and also have been described their clinical implications.5-16 These publications considered that, in spite that the ECG patterns found in left atrial enlargement (LAE) are often significantly influenced by the presence of impaired interatrial conduction, the same as that happens with ventricular enlargement and ventricular blocks, these 2 ECG patterns may appear individually, in spite that the atrial blocks in general and the ECG patterns of interatrial blocks in particular are not described and even mentioned as an ECG pattern in most of books of ECG.17-22
Prevalence of Interatrial Block in Young Healthy Men <35 Years of Age
2007, American Journal of CardiologyCitation Excerpt :This discrepancy among textbooks and studies might be due to different methods for the estimation of Pdur, because the textbooks restrict the measurement to a single lead, or due to a failure to diagnose IAB, even in a tertiary care teaching hospital, with hazardous consequences.2,14 In contrast to textbooks, recent studies have used >9 leads to estimate maximum Pdur because IAB can appear in any lead.9,10,12,13,15 In our study, we found more frequent IAB in leads II, V3, and V5.
Long-Term Prognostic Value of P-Wave Characteristics for the Development of Atrial Fibrillation in Subjects Aged 55 to 74 Years at Baseline
2007, American Journal of CardiologyCitation Excerpt :Although standard textbooks recommend evaluating the P wave in only lead II, only half of the broadest P waves are seen in this lead.5 Maximum P-wave duration was dichotomized using the cutoff of 120 ms according to recent recommendations.6 P waves were found to be “notched” if peak-to-peak distance in the M-shape was ≥1 mm (0.04 second; Figure 1).
ECG and CT for the detection of left atrial enlargement in hypertensive individuals—a population-based study
2022, Hypertension Research