Background: Heart disease remains the leading cause of morbidity and mortality worldwide. Typical symptoms of heart disease are lacking in nearly one-third of patients with acute myocardial infarction (AMI). Simplified ECG assessment via lead I by various handheld and smartphone-based electrocardiogram (ECG) devices may be used for rapid screening without the traditional delays, privacy concerns, or costs of 12-lead ECG recording in patients who are asymptomatic or have atypical symptoms. The purpose of this DNP project was to compare ECG data from lead I to the standard 12-lead ECG to determine its potential efficacy as an early screening tool for AMI. Methods: This project compared ECGs in 84 patients with cardiac diagnoses, 66 (78.6%) had acute myocardial infarction with abnormal 12-lead ECGs and 18 (22.6 %) were without AMI or abnormal findings on the standard 12-lead ECG. ST-segment and T-wave amplitude and characteristics were compared between infarction territories. Results: Lead I in those with abnormal ECGs had a mean ST-segment deviation from baseline of 1.0 ± 0.7 mm, which was significantly different than those with normal ECGs (mean 0.1 ± 0.3 mm)(p = .000). The mean T-wave amplitude in patients with abnormal ECGs was 0.7 ± 1.3 mm, which was a significant reduction compared to those with normal ECGs group of 2.2 ± 1.5 mm (p = .000). Conclusion: ST-segment deviations and reduction in T-wave amplitude are significant indicators of acute myocardial infarction in lead I ECG, the same vector used in handheld single-lead ECG devices.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/347311 |
| Date | January 2015 |
| Creators | Arnold, Michael Leonard |
| Contributors | Wung, Shu-Fen, Wung, Shu-Fen, Merkle, Carrie J., Rosenfeld, Anne G. |
| Publisher | The University of Arizona. |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Electronic Dissertation |
| Rights | Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. |
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