T Wave Alternans Causes & Reasons

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T Wave Alternans Symptom Checker: Possible causes include Torsades De Pointes. Check the full list of possible causes and conditions now! Talk to our Chatbot to narrow down your search.

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Possible Causes

Torsades De Pointes

U wave was observed in 86 episodes (56.9%), among that in 69 episodes, the U/T wave ratio was 1. Macro T wave alternans was observed in 4 patients. [ncbi.nlm.nih.gov]

[…] reversed asymmetry (20.0% vs 0%, P .001), and T-wave alternans (35.0% vs 0%, P .001). [ncbi.nlm.nih.gov]

T-wave alternans and sinus pause corroborates this further. [ecgwaves.com]

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Nonsustained Ventricular Tachycardia

We examined whether T-wave alternans (TWA) level is correlated with nonsustained ventricular tachycardia (NSVT) incidence in association with PCI in patients with acute ST-segment [ncbi.nlm.nih.gov]

OBJECTIVE: Microvolt T-wave Alternans (TWA) is associated with abnormal repolarization and predicts arrhythmic mortality in patients with previous myocardial infarction (MI [ncbi.nlm.nih.gov]

Alternans T-wave alternans (TWA) is a test that is thought to reflect dispersion of repolarization and has been shown to predict VT inducibility and future arrhythmic events [clinicalgate.com]

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Long QT Syndrome

[…] case with type 3 congenital long QT syndrome, who exhibited a sudden paradoxical QT-interval prolongation during a progressive increase in heart rate, which exacerbated T-wave [ncbi.nlm.nih.gov]

U wave was observed in 86 episodes (56.9%), among that in 69 episodes, the U/T wave ratio was 1. Macro T wave alternans was observed in 4 patients. [ncbi.nlm.nih.gov]

alternans in polarity or amplitude ( Figure 1 ), when observed, is diagnostic as we proposed 40 years ago. 31 T-wave alternans is a marker of major electric instability and [circep.ahajournals.org]

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Ventricular Tachycardia

Like T-wave alternans, the test is not widely used, with the exception of longitudinal evaluation of patients with suspected ARVC. [emedicine.com]

Chow T, Kereiakes DJ, Bartone C, et al. Prognostic utility of microvolt T-wave alternans in risk stratification of patients with ischemic cardiomyopathy. [ncbi.nlm.nih.gov]

Signal-averaged ECG, baroreflex sensitivity, heart rate variability, and T-wave alternans were not helpful for arrhythmia risk stratification. [academic.oup.com]

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Ventricular Fibrillation

RESULTS: Frequencies of history of syncope and spontaneous type 1 ECG, r-J interval in V1, QRS duration in V6, and LAS40, Tpeak-Tend dispersion, and max T-wave alternans were [ncbi.nlm.nih.gov]

In this type of test, slight changes in your electrocardiogram’s T wave are monitored during gentle exercise. [healthline.com]

wave alternans 1 Notched T waves in three leads 1 Low heart rate for age (resting rate below second percentile 0.5 Clinical History Syncope With stress 2 Without stress 1 [emedicine.medscape.com]

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Ventricular Arrhythmia

T wave alternans in idiopathic long QT syndrome. J Am Coll Cardiol. 1994;23(7):1541–6. PubMed CrossRef Google Scholar 50. Napolitano C, Priori SG, Schwartz PJ. [doi.org]

[…] morphology, 8 9 T-wave alternans, 10 an abnormal slope of the relation of QT interval to cycle length (QT/RR interval slope), 11 12 13 and an abnormal QRST isoarea distribution [doi.org]

[…] systolic blood pressure rises above 200 mm Hg, there is an increase in premature ventricular contractions or nonsustained ventricular tachycardia or polymorphic VT occurs, T-wave [doi.org]

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Long QT Syndrome 14

[…] individual. 5/14 patients with LQTS had pathological findings during ambulatory ECG monitoring (2 patients with episodes of torsade de pointes tachycardia, 2 patients with T-wave [karger.com]

Follow-up electrocardiograms and Holter records show persistent QT prolongation, bizarre T waves, and intermittent episodes of T wave alternans. [link.springer.com]

T wave alternans Beat-to-beat alternation of the T wave, in polarity or amplitude, may be present at rest for brief moments but most commonly appears during emotional or physical [ojrd.biomedcentral.com]

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Paroxysmal Ventricular Tachycardia

Chest. 1977 Feb;71(2):142-5. Abstract We examined the harbingers of 68 episodes of paroxysmal ventricular tachycardia in 42 patients with documented acute myocardial infarction. Late ventricular premature contractions initiated 46 bouts of paroxysmal ventricular tachycardia, while 17 were engendered by early[…] [ncbi.nlm.nih.gov]

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Torsade-De-Pointes Syndrome with Short Coupling Interval

E-mail: Alizadeh_73/at/yahoo.com Abstract This report presents a patient with macrovolt T wave alternans, PVC with R on T or a long-short sequence followed by torsades de [ipej.org]

Fig. 2 (a) illustrates a gradual increase in the sinus rate with T-wave alternans resulting in TdP. [academic.oup.com]

July 2010: Revista Española de Cardiología # 19 Amir Tavoosi, Abolfath Alizadeh, Mazdak Khalili, Zahra Emkanjoo This report presents a patient with macrovolt T wave alternans [readbyqxmd.com]

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Long QT Syndrome 5

The morphology of the T wave is often useful for the diagnosis, and the precordial leads are especially informative when they reveal biphasic or notched T waves.30 T-wave [ahajournals.org]

alternans 1 point Notched T-waves in at least 3 leads 1 point Low heart rate for age (children) 0.5 points Syncope with stress 2 points Cannot receive points both for syncope [en.wikipedia.org]

alternans in polarity or amplitude (Figure 1), when observed, is diagnostic as we proposed 40 years ago.31 T-wave alternans is a marker of major electric instability and identifies [ahajournals.org]

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Long QT Syndrome 12

After the patient returned to ICU, the ECG showed QT prolongation with large U waves and T-wave alternans. [ci.nii.ac.jp]

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Long QT Syndrome 10

T-wave alternans and sinus pause corroborates this further. [ecgwaves.com]

wave alternans - 1 point Notched T wave in at least 3 leads - 1 point Low heart rate for age (children) - 0.5 points Syncope (one cannot receive points both for syncope and [checkorphan.org]

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Long QT Syndrome 13

alternans [1 point] Notched T wave in 3 leads [1 point] Low heart rate for age [0.5 point] Clinical history Syncope [2 points] With stress [1 point] Without stress [1 point [athletesheart.org]

T-wave alternans and sinus pause corroborates this further. [ecgwaves.com]

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Long QT Syndrome 6

Macroscopic T wave alternans in long QT syndrome. Indian J Pediatr. 2006;73:539–40. PubMed CrossRef 14. Abass FA, Shahi M, Kumar N, Bhargava M, Gupta S, Puliyel JM. [springermedizin.de]

alternans 1 Notched T-wave in 3 leads 1 Low heart rate for age (children) 0.5 Syncope With stress Without stress 2 1 Congenital deafness 0.5 Family member with definite LQTS [geneticheartdisease.org]

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Barth Syndrome

Evaluation included echocardiography, electrocardiography (standard and signal-averaged), microvolt T wave alternans analysis, biochemical and hematologic laboratory analyses [ncbi.nlm.nih.gov]

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Pulsus Alternans

Furthermore, T-wave alternans is observed in the absence of acute myocardial ischemia [69,70]. [doi.org]

Repolarization alternans can be further subclassified as T-wave alternans and ST-segment alternans. [emedicine.medscape.com]

Repolarization Alternans Can be further subclassified as T-wave alternans and ST-segment alternans. [mdnxs.com]

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Cardiac Arrhythmia

Diagnostic Tools EKG/ECG Holter/Event Monitor Tilt Table Test Electrophysiology (EP) Study T Wave Alternans Genetic testing Echocardiogram CT Scan Cardiovascular MRI PET Scan [medstarunionmemorial.org]

Diagnostic Tools ECG Holter/Event Monitor Tilt Table Test Electrophysiology (EP) Study T Wave Alternans Genetic testing Echocardiogram CT Scan Cardiovascular MRI PET Scan [medstarheartinstitute.org]

Fig. 2 (a) illustrates a gradual increase in the sinus rate with T-wave alternans resulting in TdP. [dx.doi.org]

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Brugada Syndrome

T‐wave alternans in patients with Brugada syndrome T‐wave alternans is the ECG manifestation of action potential repolarization alternans. [intechopen.com]

Cellular Mechanism and Arrhythmogenic Potential of T-Wave Alternans in the Brugada Syndrome. [ncbi.nlm.nih.gov]

The relationship between the magnitude of T wave alternans and amplitude of the corresponding T wave in patients with Brugada syndrome. [revespcardiol.org]

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Familial Ventricular Tachycardia

The long QT syndrome is characterized by increased QT interval duration and the presence of T-wave alternans- an indicator for increased risk of cardiac arrhythmias. [symptoma.com]

T wave alternans（英语：T wave alternans） ST Osborn wave（英语：Osborn wave） ST elevation（英语：ST elevation） ST depression（英语：ST depression） Strain pattern（英语：Strain pattern）心肥大（英语 [zh.wikipedia.org]

T wave may be notched- often in long QT 2 syndrome (LQT2) or have a wide base- especially in LQT1. [symptoma.com]

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Long QT Syndrome 3

alternans 1 point Notched T-waves in at least 3 leads 1 point Low heart rate for age (children) 0.5 points Syncope with stress 2 points Cannot receive points both for syncope [en.wikipedia.org]

Corrected QT interval (QTc) 480 ms 3 points QTc defined according to Bazett's correction 460-470 ms 2 points 450 ms and male gender 1 point Torsades de pointes 2 points T-wave [en.wikipedia.org]

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Long QT Syndrome 1

alternans 1 point Notched T-waves in at least 3 leads 1 point Low heart rate for age (children) 0.5 points Syncope with stress 2 points Cannot receive points both for syncope [en.wikipedia.org]

Corrected QT interval (QTc) 480 ms 3 points QTc defined according to Bazett's correction 460-470 ms 2 points 450 ms and male gender 1 point Torsades de pointes 2 points T-wave [en.wikipedia.org]

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Tonsillitis

macroscopic T-wave alternans, postpubertal females, and LQT2 or LQT3 genotype. [thecardiologyadvisor.com]

and macroscopic T-wave alternans (vertical arrows). [ahajournals.org]

A recent report reveals that mexiletine shortens QT and attenuates T wave alternans and 2:1 AV block in LQT8. [thecardiologyadvisor.com]

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Idiopathic Ventricular Fibrillation

The following risk stratifiers were assessed: late potentials (LPs; depolarization abnormality marker) for 24 hours using a newly developed signal-averaging system, and T-wave [ncbi.nlm.nih.gov]

Diagnostic Evaluation 69 T-Wave Alternans Part X. [euro-libris.ro]

alternans and QT dispersion (repolarization abnormality markers). [ncbi.nlm.nih.gov]

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Catecholaminergic Polymorphic Ventricular Tachycardia Type 2

Eloff -- Diagnostic Electrocardiography / Preben Bjerregaard -- Microvolt T Wave Alternans: Mechanisms and Implications for Prediction of Sudden Cardiac Death / Florian Rader [worldcat.org]

Mean T-wave alternans (TWA) was 25 1.4 µV in CPVT patients vs. 31 2.0 µV in controls (P 0.05). [ncbi.nlm.nih.gov]

Wave Alternans: Mechanisms and Implications for Prediction of Sudden Cardiac Death -- Heart Rate Variability: Measurements and Risk Stratification -- Orthostatic Challenge [worldcat.org]

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Hypogonadism

T wave electric alternans. 7. LQTS3 genotype. [revespcardiol.org]

T-wave alternans and the susceptibility to ventricular arrhythmias.. [revespcardiol.org]

A: T wave electrical alternans. B: atrioventricular block 2:1. C: self-limited torsade de pointes. [revespcardiol.org]

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Long QT Syndrome 8

Macroscopic T-wave alternans: Positive and negative T waves on a beat-to-beat basis. [ncbi.nlm.nih.gov]

The severity of T-wave alternans tends to correlate with the risk of cardiac events. 10 View/Print Figure FIGURE 3. Electrocardiogram showing torsades de pointes. [aafp.org]

Significant T wave alternans and torsades were documented during anesthesia. The child had seizures with increasing frequency. [doi.org]

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Sudden Cardiac Death

ECG indices included: turbulence slope (TS), reflecting autonomic dysfunction; T-wave alternans (TWA), reflecting ventricular repolarization instability; and T-peak-to-end [ncbi.nlm.nih.gov]

KEYWORDS: Dispersion; Electrocardiography; Heterogeneity; Ischemic heart disease; Repolarization; Risk stratification; Sudden cardiac death; T-wave alternans; Vectorcardiography [ncbi.nlm.nih.gov]

Beat-to-beat variations in T-wave morphology and/or polarity (T-wave alternans), a marker of increased electrical instability and fibrillation ( 32 ), arise from alternation [doi.org]

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Ischemic Cardiomyopathy

To test the hypothesis that microvolt T-wave alternans (MTWA) in humans causes spatial DOR, we measured Tpeak-Tend interval (Tpe) and Tpe/QT ratio, electrocardiographic indices [ncbi.nlm.nih.gov]

INTRODUCTION: In experimental models, spatial dispersion of repolarization (DOR) due to discordant cellular alternans predisposes to ventricular fibrillation. [ncbi.nlm.nih.gov]

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Incessant Infant Ventricular Tachycardia

Like T-wave alternans, the test is not widely used, with the exception of longitudinal evaluation of patients with suspected ARVC. [emedicine.medscape.com]

Microvolt T-wave alternans: there is evidence to suggest that it might be helpful as a negative predictor in patients with ischemic heart disease, who might be at risk for [clinicaladvisor.com]

In the pediatric population, although T-wave alternans do seem to be associated with serious VAs, other variables offer more information. [emedicine.medscape.com]

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Variant Angina Pectoris

The inducibility of polymorphic ventricular tachycardia or ventricular fibrillation, increased QT dispersion, T-wave alternans, and early repolarization during the asymptomatic [ncbi.nlm.nih.gov]

The inducibility of polymorphic ventricular tachycardia or ventricular fibrillation, increased QT dispersion, T‐wave alternans, and early repolarization during the asymptomatic [doi.org]

Early repolarization and positive T-wave alternans as risk markers for life-threatening arrhythmias in patients with vasospastic angina. Int J Cardiol. 2015;196:7–13. [doi.org]

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