ST-segment depression in leads I and aVL: Artifactual or pathophysiological findings?
2021-06-16
(Press-News.org) In a new publication from Cardiovascular Innovations and Applications; DOI https://doi.org/10.15212/CVIA.2021.0013, Sharen Lee, Gary Tse, Xin Wang, Adrian Baranchuk and Tong Liu from Laboratory of Cardiovascular Physiology, Hong Kong, China, Second Hospital of Tianjin Medical University, Tianjin, China and Queen's University, Kingston, Ontario, Canada consider ST-segment depression in leads I and aVL.
The 12-lead electrocardiogram (ECG) is a routinely performed test but is susceptible to misinterpretation even by experienced physicians. The authors report a case of a 72-year-old lady with no prior cardiac history presenting with atypical chest pain. Her initial electrocardiogram shows an initial ST depression followed by positive deflections leads I and aVL. Non-physiological ST segment and T-wave changes were also observed in the precordial leads V2 to V6. By contrast, these abnormalities were notably absent in lead II. A repeat of the ECG taken 30 minutes later revealed the resolution of most abnormalities seen in the initial ECG on a background of high-frequency noise in the limb leads. The patient was referred to the cardiology department for further management. An urgent echocardiogram revealed no regional wall motion abnormalities with preserved ejection fraction, and her coronary angiogram revealed no significant coronary stenosis.
This case illustrates the importance of understanding different factors that can cause ST segment abnormalities, notably artifactual changes that can mimic ST segment myocardial infarction.
INFORMATION:
Citation information: ST-Segment Depression in Leads I and aVL: Artifactual or Pathophysiological Findings? Sharen Lee, Gary Tse, Xin Wang, Adrian Baranchuk and Tong Liu, Cardiovasc. Innov. App., 2021, https://doi.org/10.15212/CVIA.2021.0013
Keywords: ST segment; artifact.
CVIA is available on the IngentaConnect platform and at Cardiovascular Innovations and Applications. Submissions may be made using ScholarOne Manuscripts. There are no author submission or article processing fees. CVIA is indexed in the EMBASE, ESCI, OCLC, Primo Central (Ex Libris), Sherpa Romeo, NISC (National Information Services Corporation), DOAJ and Index Copernicus Databases. Follow CVIA on Twitter @CVIA_Journal; or Facebook.
ELSE PRESS RELEASES FROM THIS DATE:
2021-06-16
Commonplace pharmaceuticals, such as ibuprofen, can carry with them an inherent flaw in their atomic structure, which pairs the active, beneficial ingredient with a potentially ineffective -- or even toxic -- counterpart. New research could hold the key to more easily isolating the good while removing the unwanted.
Dr. Shoufeng Lan, assistant professor in the J. Mike Walker '66 Department of Mechanical Engineering at Texas A&M University, is leading a team investigating the use of electromagnetic control over the synthesis of chiral compounds at an atomic level -- a process that could lead to a plethora of practical ...
2021-06-16
How do top athletes talk about doping when they themselves are using performance-enhancing drugs? Or do they just avoid the issue? A new study by the University of Göttingen reveals that any decision to use drugs almost inevitably means the decision to engage in deceptive communication such as lying or omitting information. Those using drugs, for example, regularly describe anti-doping policies as being more intense than ever or overly restrictive, play down the extent of the doping problem, or portray themselves as victims. The results were published in the European Journal for Sport and Society.
Dr Marcel Reinold, Head of Sport and Health Sociology at the Institute of Sport and Exercise Sciences at Göttingen University, analysed autobiographies of professional ...
2021-06-16
A new paper in the journal Cognition examines the visual complexity of written language and how that complexity has evolved.
Using computational techniques to analyze more than 47,000 different characters from 133 living and extinct scripts, co-authors Helena Miton of the Santa Fe Institute and Oliver Morin of the Max Planck Institute for the Science of Human History, addressed several questions around why and how the characters of different writing systems vary in how complex they appear.
"When we started this project, we wanted to test whether you find a general simplification of characters over time," Miton says. "Do scripts simplify their ...
2021-06-16
The presence of pro-inflammatory cytokines in the blood can boost the effects of daily cannabis use and heighten the risk of developing psychosis in adulthood. Similar results have been observed, also in the presence of cytokines, when cannabis is used during adolescence. Psychotic disorders have symptoms such as delirium, loss of a sense of reality, hallucinations, hearing voices, and cognitive and social impairments.
A study by researchers at the University of São Paulo's Ribeirão Preto Medical School (FMRP-USP) in Brazil, reported in an article in ...
2021-06-16
RUDN University biologist studied the aggressive impact of environmental factors (water, salts, and ozone) on ultrathin nanofibers of biopolymers. The results will help choosing suitable bioplastic depending on the use; for example, for medical implants, biodegradable packaging or filters for water cleaning. The results are published in the journal Polymers.
Bioplastics are an alternative to ordinary plastics. They are obtained from waste of plant and food industry. The safe composition allows using them as filters for gases and liquids, as "sponges" for cleaning reservoirs and medical implants. Depending on the field ...
2021-06-16
NEW YORK, NY (June 16, 2021)--Spectacular images of a molecule that shuttles omega-3 fatty acids into the brain may open a doorway for delivering neurological therapeutics to the brain.
"We've managed to obtain a three-dimensional structure of the transporter protein that provides a gateway for omega-3s to enter the brain. In this structure, we can see how omega-3s bind to the transporter. This information may allow for the design of drugs that mimic omega-3s to hijack this system and get into the brain," says first author Rosemary J. Cater, PhD, a Simons Society Fellow in the Mancia Lab at Columbia University Vagelos College of Physicians and Surgeons.
The study was published online on June 16 in the journal Nature.
A major challenge in treating ...
2021-06-16
Bay Area scientists have captured the real-time electrical activity of a beating heart, using a sheet of graphene to record an optical image -- almost like a video camera -- of the faint electric fields generated by the rhythmic firing of the heart's muscle cells.
The graphene camera represents a new type of sensor useful for studying cells and tissues that generate electrical voltages, including groups of neurons or cardiac muscle cells. To date, electrodes or chemical dyes have been used to measure electrical firing in these cells. But electrodes and dyes measure the voltage at one point only; a graphene sheet measures the voltage ...
2021-06-16
Should zoos display legally protected species that have been smuggled out of their range countries? A new study suggests that a pause and rethink may be needed, as it reports that accredited zoos have acquired a rare and legally protected reptile, the earless monitor lizard endemic to Borneo, without any evidence that the animals were legally exported.
The earless monitor lizard occurs only on the island of Borneo and has been described as a "miniature Godzilla" and "the Holy Grail of Herpetology." Discovered by western scientists almost 150 years ago, for most of this period the species was known largely from pickled specimens in natural history collections, and wasn't recorded from ...
2021-06-16
American Indian and Alaska Native Enrollment in Clinical Studies in the National Institutes of Health's Intramural Research Program
Dejonna Vigil, Ninet Sinaji, and Barbara Karp
This is the first study to provide data about the inclusion of American Indians and Alaska Natives in the National Institutes of Health's Intramural Research Program (NIH-IRP), which provides eligible individuals with access to innovative research treatments that may not otherwise be available. The program's mission is to include all Americans. This study analyzed data from more than 1,800 NIH-IRP protocols active in 2014 and 2017. While the number of American ...
2021-06-16
When someone bumps their elbow against a wall, they not only feel pain but also might experience bruising. Robots and prosthetic limbs don't have these warning signs, which could lead to further injury. Now, researchers reporting in ACS Applied Materials & Interfaces have developed an artificial skin that senses force through ionic signals and also changes color from yellow to a bruise-like purple, providing a visual cue that damage has occurred.
Scientists have developed many different types of electronic skins, or e-skins, that can sense stimuli through electron transmission. However, these electrical conductors are not always biocompatible, which could limit their use in some types of prosthetics. In contrast, ionic skins, or I-skins, ...
LAST 30 PRESS RELEASES:
[Press-News.org] ST-segment depression in leads I and aVL: Artifactual or pathophysiological findings?
