An Overview of QT Dispersion Finding in Cardiac Patients,Review Article

Sanad, Ahmed Mohamed; Ghazal, Kamel Hasan; Tahlawi, Mohammad El; Abdelwahed, Ahmed Taha

doi:10.21608/ejhm.2021.204579

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…QTd values are controversial, and the normal range varies across studies. Those with QTd > 60 ms had twice the risk of sudden cardiac death than those with <30 ms. Several studies have shown that they are more reliable measures of transmural distribution than Tp-e/QT ratios [ 20 ]. In our study, no difference was found between the groups regarding QTd.…”

Section: Discussionmentioning

confidence: 99%

Effect of Smokeless Tobacco (Maras Powder) on the Epicardial Fat Thickness and Ventricular Repolarization Parameters

Göçer,

Öztürk,

Kaniyolu

et al. 2023

Medicina

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Background and Objectives: Smokeless tobacco (ST) use has recently become an alternative to cigarettes, and it has been concluded that ST is at least as harmful as cigarettes. ST use is thought to play a role in the pathogenesis of arrhythmia by affecting ventricular repolarization. In this study, we aimed to examine the relationships of Maras powder (MP), one of the ST varieties, with epicardial fat thickness and new ventricular repolarization parameters, which have not previously been described. Materials and Methods: A total of 289 male individuals were included in this study between April 2022 and December 2022. Three groups, 97 MP users, 97 smokers, and 95 healthy (non-tobacco), were compared according to electrocardiographic and echocardiographic data. Electrocardiograms (ECG) were evaluated with a magnifying glass by two expert cardiologists at a speed of 50 m/s. Epicardial fat thickness (EFT) was measured by echocardiography in the parasternal short- and long-axis images. A model was created with variables that could affect epicardial fat thickness. Results: There were no differences between the groups regarding body mass index (p = 0.672) and age (p = 0.306). The low-density lipoprotein value was higher in the MP user group (p = 0.003). The QT interval was similar between groups. Tp-e (p = 0.022), cTp-e (p = 0.013), Tp-e/QT (p =0.005), and Tp-e/cQT (p = 0.012) were higher in the MP user group. While the Tp-e/QT ratio did not affect EFT, MP predicted the epicardial fat thickness (p < 0.001, B = 0.522, 95%CI 0.272–0.773). Conclusions: Maras powder may play a role in ventricular arrhythmia by affecting EFT and causing an increase in the Tp-e interval.

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Section: Discussionmentioning

confidence: 99%

Effect of Smokeless Tobacco (Maras Powder) on the Epicardial Fat Thickness and Ventricular Repolarization Parameters

Göçer,

Öztürk,

Kaniyolu

et al. 2023

Medicina

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“…In rheumatic disorders, such as rheumatoid arthritis, Behcet's disease, systemic sclerosis, and systemic lupus erythematosus, QTd was shown to be prolonged [ 19 ]. Electrolyte imbalance, heart failure, myocardial infarction, drug toxicity, anti-arrhythmic drugs, hypertrophic cardiomyopathy, and heart failure are other causes that prolonged QTd [ 20 ]. Therefore, these diseases were excluded from the study.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the Cardiac Conduction System in Fibromyalgia Patients With Complaints of Palpitations

Günlü¹,

Aktan²

2022

Cureus

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This study aimed to investigate the influence of fibromyalgia syndrome (FMS) on the cardiac conduction system and assess patients' palpitation complaints using 24-h ambulatory ECG (Holter {Maynard, MA: Northeast Monitoring, Inc.}) monitoring. MethodsNinety patients with FMS and 70 healthy controls were included in this research. ECG was performed on all participants, and ECG parameters were calculated. Holter monitoring was conducted, and the recordings were analyzed. The results of time-domain heart rate variability (HRV) were evaluated. ResultsThe patient group's mean age was 38.3±6.3 years. There were no statistically significant differences in demographic or laboratory parameters across the groups (p>0.05). The findings of a 24-h Holter ECG recording did not vary significantly between the groups (p=0.182). In the study group, the values for the standard deviation of R-R intervals (SDNN), low frequency (LF), and low/high frequency (LF/HF), which are known as HRV indicators, were substantially different between the two groups (p<0.05). ConclusionsThe study indicated that the risk of arrhythmias did not increase even though FM patients complained of palpitations.

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“…Variables such as cardiac ischemia, age, activity, smoking, gender, diabetes and genetics may affect QT intervals (7) . Catecholamine release causes an elevated heart rate during exercise in healthy persons, and therefore, the QT interval is predicted to shorten.…”

Section: Introductionmentioning

confidence: 99%

Correlation between QT Interval Prolongation or Dispersion in Positive Exercise ECG Patients and severity of coronary artery disease

Ebaid,

Rashid,

Tabl

et al. 2023

Benha Medical Journal

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Purpose: Exercise stress testing is a cost-effective, noninvasive and safe approach for assessing coronary artery disease (CAD), but it is documented that it has low specificity and predictive value. Consequently, there is a search for other factors that might enhance this test's precision. This work aimed to determine if QT interval prolongation or dispersion in a positive exercise electrocardiographic test (ECG) patient may indicate CAD. Methods: A cross sectional study included 150 stress ECG positive patients; clinical history and physical examination data were collected from the recruited patients; they also were subjected to coronary angiography. Occlusion rate≥ 70% in the left anterior descending artery, circumflex or right coronary artery or ≥ 50% in the left main coronary artery was considered obstructive CAD. Patients were divided into 3 groups (normal, non-obstructive CAD and obstructive CAD). Gensini score was calculated to quantify angiographic atherosclerosis. Results : Among the studied patients, 19 (12.7%) patients had normal angiogram, 20.7% had non obstructive CAD and 67.3% of them had obstructive CAD. QT interval significantly increased in obstructive CAD patients at peak exercise and at recovery, QT dispersion (QTd) significantly increased in obstructive CAD at beginning and peak exercise, corrected QT also significantly increased in obstructive CAD. QTd at peak exercise had the best validity to predict obstructive CAD patients with sensitivity 86.1%, specificity 56.7% at a cutoff point 39. Conclusion: QT dispersion had good sensitivity and total accuracy 79.4% that increase capability of stress ECG to detect obstructive CAD.

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An Overview of QT Dispersion Finding in Cardiac Patients,Review Article

Cited by 4 publications

References 16 publications

Effect of Smokeless Tobacco (Maras Powder) on the Epicardial Fat Thickness and Ventricular Repolarization Parameters

Effect of Smokeless Tobacco (Maras Powder) on the Epicardial Fat Thickness and Ventricular Repolarization Parameters

Evaluation of the Cardiac Conduction System in Fibromyalgia Patients With Complaints of Palpitations

Correlation between QT Interval Prolongation or Dispersion in Positive Exercise ECG Patients and severity of coronary artery disease

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