University of Massachusetts Medical School Faculty Publications

UMMS Affiliation

Department of Medicine, Division of Cardiovascular Medicine

Date

1-18-2013

Document Type

Article

Medical Subject Headings

Aged; *Electrocardiography; Female; Humans; Male; Mass Screening; Pulmonary Emphysema; Smoking

Disciplines

Cardiology | Diagnosis | Respiratory Tract Diseases

Abstract

BACKGROUND: Pulmonary emphysema of any etiology has been shown to be strongly and quasidiagnostically associated with a vertical frontal P wave axis. A vertical P wave axis (>60 degrees) during sinus rhythm can be easily determined by a P wave in lead III greater than the P wave in lead I (bipolar lead set) or a dominantly negative P wave in aVL (unipolar lead set). The purpose of this investigation was to determine which set of limb leads may be better for identifying the vertical P vector of emphysema in adults.

METHODS: Unselected consecutive electrocardiograms from 100 patients with a diagnosis of emphysema were analyzed to determine the P wave axis. Patients aged younger than 45 years, those not in sinus rhythm, and those with poor quality tracings were excluded. The electrocardiographic data were divided into three categories depending on the frontal P wave axis, ie, >60 degrees, 60 degrees, ordegrees, by each criterion (P amplitude lead III > lead I and a negative P wave in aVL).

RESULTS: Sixty-six percent of patients had a P wave axis > 60 degrees based on aVL, and 88% of patients had a P wave axis > 60 degrees based on the P wave in lead III being greater than in lead I.

CONCLUSION: A P wave in lead III greater than that in lead I is a more sensitive marker than a negative P wave in aVL for diagnosing emphysema and is recommended for rapid routine screening.

Rights and Permissions

Citation: Bajaj R, Chhabra L, Basheer Z, Spodick DH. Optimal electrocardiographic limb lead set for rapid emphysema screening. Int J Chron Obstruct Pulmon Dis. 2013;8:41-4. doi: 10.2147/COPD.S37776.Link to article on publisher's site

Comments

Copyright 2013 Bajaj et al, publisher and licensee Dove Medical Press Ltd. This is an Open Access article which permits unrestricted noncommercial use, provided the original work is properly cited.

Related Resources

Link to Article in PubMed

Keywords

P wave axis, Electrocardiography, Emphysema

PubMed ID

23378754

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