20 nonspecific st and t wave abnormality meaning Ultimate Guide

20 nonspecific st and t wave abnormality meaning Ultimate Guide

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ECG basics | nonspecific ST T wave changes | differential diagnosis, ECG findings and examples

ECG basics | nonspecific ST T wave changes | differential diagnosis, ECG findings and examples
ECG basics | nonspecific ST T wave changes | differential diagnosis, ECG findings and examples

Nonspecific ST-segment and T-wave changes [1]

[1]; Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. Non specific ST T wave changes refer to changes in the T waves (such as inversion or flattening) and ST segments (such as ST depression) on the electrocardiogram that due not follow an anatomic distribution and are not diagnostic of any one condition.
– Hyperventilation (in 70% of patients after 30 to 60 seconds). – Orthostatic changes (3 to 23%), most prominent in the inferior leads

68 causes of T wave, ST segment abnormalities [2]

How often do you see an ECG that is just a little off? Maybe the T wave is flat, oddly-shaped or inverted. Maybe the ST segment is coved, very minimally-depressed or shows some J point elevation.
Here, we consider the potentially-underlying reasons for these annoying minimal ECG changes and explore various clinical situations that could cause T waves and ST segments to deviate from normal.. In some instances, T wave changes might suggest specific conditions, such as peaked T waves in hyperkalemia or symmetric T wave inversions during myocardial ischemia
Similarly, ST segment abnormalities on the ECG can sometimes be due to a specific cause, such as ST segment elevation myocardial infarction, pericarditis or myocardial ischemia. Review the following ECG findings when the ST segment change or T wave change is actually indicative of a specific condition

Newly developed ST-T abnormalities on the electrocardiogram and chronologic changes in cardiovascular risk factors [3]

Newly developed ST-T abnormalities on the electrocardiogram and chronologic changes in cardiovascular risk factors. Newly developed ST-T abnormalities on the electrocardiogram and chronologic changes in cardiovascular risk factors
But how ST-T abnormality develops in relation to chronologic changes in cardiovascular risk factors has not been fully discussed. Sixty-eight men whose ECG had been initially normal but who exhibited ST-T abnormality later (ST-T subjects) were identified among 21,579 apparently healthy adults who had undergone comprehensive health examinations for > 10 years
Antihypertensive drugs were given to 26 of the ST-T subjects. Their cardiovascular risk factors were chronologically reviewed from 10 years before the onset of definite ST-T abnormality, and were compared with those of 68 men whose ECG had remained consistently normal for 10 years (controls)

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An introduction to clinical electrocardiography [4]

General Introduction to ST, T, and U wave abnormalities. Basic Concept: the specificity of ST-T and U wave abnormalities is provided more by the clinical circumstances in which the ECG changes are found than by the particular changes themselves
This does not mean that the ECG changes are unimportant! It is the responsibility of the clinician providing care for the patient to ascertain the importance of the ECG findings.. Factors affecting the ST-T and U wave configuration include:
– Drugs (e.g., digoxin, quinidine, tricyclics, and many others). – Electrolyte abnormalities of potassium, magnesium, calcium

ST Segment [5]

This book is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ), which permits others to distribute the work, provided that the article is not altered or used commercially. You are not required to obtain permission to distribute this article, provided that you credit the author and journal.
Treasure Island (FL): StatPearls Publishing; 2023 Jan-.. The ST segment on an electrocardiogram (ECG) normally represents an electrically neutral area of the complex between ventricular depolarization (QRS complex) and repolarization (T wave)
Understanding the differential diagnosis for variations in the ST segment is critical for clinical management as it can influence treatment. This article summarizes ST segment, including how it is defined, measured, and how it varies

Nonspecific ST-T changes associated with unsatisfactory blood pressure control among adults with hypertension in China [6]

Nonspecific ST-T changes associated with unsatisfactory blood pressure control among adults with hypertension in China. Nonspecific ST-segment and T-wave (ST-T) changes represent one of the most prevalent electrocardiographic abnormalities in hypertensive patients
The study population comprised 15,038 hypertensive patients, who were selected from 20,702 participants in the China Stroke Primary Prevention Trial. The subjects were examined with electrocardiogram test at the initial visit in order to monitor baseline heart activity
Unsatisfactory BP control was defined as systolic BP ≥140 mm Hg or diastolic BP ≥90 mm Hg following antihypertensive treatment during the 4.5-year follow-up period. Multivariate analysis was used to analyze the association between nonspecific ST-T abnormalities and unsatisfactory BP control.

68 causes of T wave, ST segment abnormalities [7]

How often do you see an ECG that is just a little off? Maybe the T wave is flat, oddly-shaped or inverted. Maybe the ST segment is coved, very minimally-depressed or shows some J point elevation.
Here, we consider the potentially-underlying reasons for these annoying minimal ECG changes and explore various clinical situations that could cause T waves and ST segments to deviate from normal.. In some instances, T wave changes might suggest specific conditions, such as peaked T waves in hyperkalemia or symmetric T wave inversions during myocardial ischemia
Similarly, ST segment abnormalities on the ECG can sometimes be due to a specific cause, such as ST segment elevation myocardial infarction, pericarditis or myocardial ischemia. Review the following ECG findings when the ST segment change or T wave change is actually indicative of a specific condition

What does non-specific ST-T elevation on ECG mean? [8]

Q: I am a 41 years old man and I underwent a routine ECG and the report showed sinus rhythm, left axis, non-specific ST-T abnormality (elevated). A:ST segment and T wave are ECG terminologies and these are arbitrary names given to certain segments of the tracings of the ECG
However some times these changes occur for conditions, which are either ill defined or even they may be compatible with total normalcy and therefore, these changes are called non-specific ST-T wave changes. These could occur, as I told earlier, as a minor variation of normalcy
Non-specific ST-T wave changes call for no treatment. At best, may be one can report any symptoms that an individual has to his doctor and get a repeat ECG done after six months to one year to compare the changes

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An introduction to clinical electrocardiography [9]

General Introduction to ST, T, and U wave abnormalities. Basic Concept: the specificity of ST-T and U wave abnormalities is provided more by the clinical circumstances in which the ECG changes are found than by the particular changes themselves
This does not mean that the ECG changes are unimportant! It is the responsibility of the clinician providing care for the patient to ascertain the importance of the ECG findings.. Factors affecting the ST-T and U wave configuration include:
– Drugs (e.g., digoxin, quinidine, tricyclics, and many others). – Electrolyte abnormalities of potassium, magnesium, calcium

Nonspecific ST-segment and T-wave on electrocardiogram [10]

Back to Journals » International Journal of General Medicine » Volume 14. Nonspecific ST-Segment and T-Wave (NS-STT) on Electrocardiogram is Associated with Increasing the Incidence of Perioperative Deep Vein Thrombosis in Patients with Lower Extremity Fracture Under 75 Years Old
Published 23 November 2021 Volume 2021:14 Pages 8631—8641. Cheng Ren,* Ming Li,* Teng Ma, Yi-Bo Xu, Zhong Li, Han-Zhong Xue, Qian Wang, Yao Lu, Liang Sun, Kun Zhang
Department of Orthopedic Trauma, Honghui Hospital, Xi’an Jiaotong University, Xi’an, Shaanxi Province, People’s Republic of China. Objective: This study aims to explore the clinical correlation between nonspecific ST-segment or T-wave (NS-STT) changes and perioperative deep vein thrombosis (DVT) in patients with lower extremity fractures.

Association of Nonspecific Minor ST-T Abnormalities With Cardiovascular Mortality [11]

Context Minor electrocardiographic (ECG) ST-T abnormalities. are common, but their prognostic importance has not been fully
multiple (2 times only and ≥3 times) nonspecific minor ST-T. abnormalities in 5 years with long-term mortality due to myocardial
Design Prospective cohort study (29-year follow-up after 5 annual. Setting and Participants A total of 1673 men employed at the

ECG tutorial: ST and T wave changes [12]

INTRODUCTION — ST- and T-wave changes may represent cardiac pathology or be a normal variant. Interpretation of the findings, therefore, depends on the clinical context and presence of similar findings on prior electrocardiograms.
The changes may be seen in all or most of the leads (diffuse changes), or they may be present contiguous leads, such as the inferior, lateral, or anterior leads.. The types of abnormalities are varied and include subtle straightening of the ST segment, actual ST-segment depression or elevation, flattening of the T wave, biphasic T waves, or T-wave inversion (waveform 1)
●Functional and physiologic variants (eg, postprandial). Flat T waves and small ST-segment changes may also be seen in healthy individuals, including well-trained athletes, leading to mistaken diagnosis of heart disease

Non-specific electrocardiographic ST-T abnormalities predict mortality in patients on peritoneal dialysis [13]

Volume 9 – 2022 | https://doi.org/10.3389/fcvm.2022.930517. Non-specific electrocardiographic ST-T abnormalities predict mortality in patients on peritoneal dialysis
– 2Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, China. Background: This study aimed to evaluate the predictive value of non-specific ST-segment and/or T-wave abnormalities in electrocardiography (ECG) for all-cause and cardiovascular mortality (CVM) in peritoneal dialysis (PD) patients.
The primary outcomes were all-cause mortality and CVM. The Kaplan–Meier method and a log-rank test were used for the survival analysis

Prognostic value of non-specific ST-T changes and left ventricular hypertrophy electrocardiographic criteria in hypertensive patients: 16-year follow-up results from the MINACOR cohort – BMC Cardiovas [14]

Prognostic value of non-specific ST-T changes and left ventricular hypertrophy electrocardiographic criteria in hypertensive patients: 16-year follow-up results from the MINACOR cohort. BMC Cardiovascular Disorders volume 15, Article number: 24 (2015)
The aim of the cohort study was to evaluate the prognostic value of non-specific ST-T changes and LVH electrocardiographic criteria on cardiovascular events and mortality in hypertensive patients.. A cohort study of 352 non-diabetic hypertensive patients, without associated cardiovascular disease, randomly selected from 1,780 hypertensive patients attended in a primary care center
Cardiovascular events and death from any cause during the follow-up period were evaluated. A multivariate analysis adjusted for gender, age and cardiovascular risk factors was performed.

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ST segment and T waves [15]

It is important we analyse each aspect of the ECG morphology including P wave, QRS complex, ST segment and T wave.. Abnormalities of the P wave, QRS complex, ST segment and T wave can tell us a lot about the patient
Certain changes to the ECG morphology are classical of an underlying pathology. For example, ST elevation is the characteristic feature of an acute ST-elevation myocardial infarction (STEMI)
For example, T wave inversion may be a normal variant in certain leads, or associated with ischaemia, ventricular hypertrophy or pulmonary embolism (among others).. Here, we discuss problems with the ST segment and T wave.

What Do T Waves On An ECG Represent? [16]

The T-wave is an important indicator for understanding and monitoring the health of the heart. T-wave abnormalities are incompletely understood and are associated with a wide differential diagnosis.
In fact, benign abnormalities occur in at least half of the leads on a 12-lead ECG.. Let us examine the significance of T waves, their function in ventricular repolarization, and how the T waves on an ECG can be interpreted in diagnosing heart disease.
It is the part of the ECG waveform that follows the QRS complex and precedes the next P wave. The shape and duration of the T-wave can provide important information about the heart’s electrical stability and overall heart health.

Prognosis of nonspecific ST-segment changes, T wave abnormalities and Q waves in patients visiting emergency departments for acute decompensated heart failure: a cohort study [17]

Greig and others, Prognosis of nonspecific ST-segment changes, T wave abnormalities and Q waves in patients visiting emergency departments for acute decompensated heart failure: a cohort study, European Heart Journal, Volume 34, Issue suppl_1, 1 August 2013, P1504, https://doi.org/10.1093/eurheartj/eht308.P1504. Purpose: To determine the risk of 30-day mortality associated with specific ECG abnormalities in patients visiting emergency departments (ED) with acute decompensated heart failure (ADHF).
We evaluated ST depression, Q waves, T wave inversions or its combinations in the presenting ECG. We used multivariable logistic regression models to adjust for variables in the EHMRG score and other variables of clinical importance, including troponin I levels
Results: ECG alterations were present in 54.9% of the subjects. The mean age was 75.84±11.79 years, 53.4% were female, and 52.7% had HF of ischemic etiology

Problems of nonspecific ECG abnormalities amongst aircrew [18]

Problems of nonspecific ECG abnormalities amongst aircrew. This paper presents an analysis of nonspecific ECG abnormalities amongst aircrew with special emphasis to its aeromedical significance
Out of 90 nonspecific ECG abnormalities, there were 70 (77.78%) of T wave, 15(16.67%) of S-T wave and 5 (5.55%) of both S-T and T wave abnormalities During follow up 1333% of nonspecific ECG abnormalities were found to develop changes specific for coronary artery diseases and 66.66% of these had one or more than one coronary risk factors.. Atherosclerotic heart disease is a major public health problem
The detection of coronary artery disease by ECG evidence of significant ST and T wave changes is well known. But ST and T wave changes may not always be significant to meet the criteria of coronary artery disease and then get labelled as nonspecific ST / T changes

Wikipedia [19]

In electrocardiography, the T wave represents the repolarization of the ventricles. The interval from the beginning of the QRS complex to the apex of the T wave is referred to as the absolute refractory period
The T wave contains more information than the QT interval. The T wave can be described by its symmetry, skewness, slope of ascending and descending limbs, amplitude and subintervals like the Tpeak–Tend interval.[1]
Repolarization of the ventricle happens in the opposite direction of depolarization and is negative current, signifying the relaxation of the cardiac muscle of the ventricles. But this negative flow causes a positive T wave; although the cell becomes more negatively charged, the net effect is in the positive direction, and the ECG reports this as a positive spike.[2] However, a negative T wave is normal in lead aVR

All Is Not Well… [20]

A 63-year-old man complained of pain in his substernal and epigastric region for the past three weeks. The pain occurred after walking a great distance or after he ate, and it resolved with rest
The patient reported no cardiac history or family history of coronary artery disease. His medical history was notable for type 2 diabetes mellitus for which he took metformin (Glucophage)
He stopped smoking 10 years ago, but he did have a 20 pack-year history. An electrocardiogram was obtained (see accompanying figure).

nonspecific st and t wave abnormality meaning
20 nonspecific st and t wave abnormality meaning Ultimate Guide

Sources

  1. https://www.wikidoc.org/index.php/Nonspecific_ST-segment_and_T-wave_changes#:~:text=Overview,diagnostic%20of%20any%20one%20condition.
  2. https://www.healio.com/cardiology/learn-the-heart/ecg-review/ecg-interpretation-tutorial/68-causes-of-t-wave-st-segment-abnormalities#:~:text=Maybe%20the%20T%20wave%20is,specifically%20signaling%20any%20medical%20condition.
  3. https://pubmed.ncbi.nlm.nih.gov/8623733/#:~:text=An%20ST%2DT%20abnormality%20on,has%20not%20been%20fully%20discussed.
  4. https://ecg.utah.edu/lesson/10#:~:text=Factors%20affecting%20the%20ST%2DT,abnormalities%20of%20potassium%2C%20magnesium%2C%20calcium
  5. https://www.ncbi.nlm.nih.gov/books/NBK459364/#:~:text=The%20ST%20segment%20on%20an,and%20repolarization%20(T%20wave).
  6. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5380254/
  7. https://www.healio.com/cardiology/learn-the-heart/ecg-review/ecg-interpretation-tutorial/68-causes-of-t-wave-st-segment-abnormalities
  8. https://doctor.ndtv.com/faq/what-does-non-specific-st-t-elevation-on-ecg-mean-29189
  9. https://ecg.utah.edu/lesson/10
  10. https://www.dovepress.com/nonspecific-st-segment-and-t-wave-ns-stt-on-electrocardiogram-is-assoc-peer-reviewed-fulltext-article-IJGM
  11. https://jamanetwork.com/journals/jama/fullarticle/188761
  12. https://medilib.ir/uptodate/show/2121
  13. https://www.frontiersin.org/articles/10.3389/fcvm.2022.930517/full
  14. https://bmccardiovascdisord.biomedcentral.com/articles/10.1186/s12872-015-0012-6
  15. https://app.pulsenotes.com/clinical/ecgs/notes/8-st-segment-t-waves
  16. https://www.ecgedu.com/what-is-t-wave-on-ecg/
  17. https://academic.oup.com/eurheartj/article/34/suppl_1/P1504/2860687
  18. https://indjaerospacemed.com/problems-of-nonspecific-ecg-abnormalities-amongst-aircrew/
  19. https://en.wikipedia.org/wiki/T_wave
  20. https://www.aafp.org/pubs/afp/issues/2002/1101/p1743.html

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