keyword
https://read.qxmd.com/read/35802829/depolarization-and-repolarization-dynamics-after-his-bundle-pacing-comparison-with-right-ventricular-pacing-and-native-ventricular-conduction
#21
JOURNAL ARTICLE
Satoshi Yanagisawa, Yasuya Inden, Ryo Watanabe, Naoki Tsurumi, Noriyuki Suzuki, Toshifumi Nakagomi, Masafumi Shimojo, Takashi Okajima, Shuro Riku, Koichi Furui, Kazumasa Suga, Rei Shibata, Toyoaki Murohara
BACKGROUND: The current study aimed to evaluate changes in electrical depolarization and repolarization parameters after His-bundle pacing (HBP) compared with right ventricular pacing (RVP) and its association with ventricular arrhythmia (VA). METHODS: Forty-one patients (13 with HBP, 14 with RVP, and 14 controls [AAI mode]) were evaluated. After continuous pacing algorithm, QRS duration, QT interval, QTc, JT interval, T-peak to T-end (Tpe), and Tpe/QT ratio were measured on electrocardiography at baseline and 1 week, 1 month, and 6 months postoperatively...
July 8, 2022: Annals of Noninvasive Electrocardiology
https://read.qxmd.com/read/35757339/sex-specific-associations-of-anxiety-with-left-ventricular-hypertrophy-and-transmural-dispersion-of-repolarization-in-hypertensive-patients
#22
JOURNAL ARTICLE
Ling Zhu, Qianwei Cui, Yong Zhang, Fuqiang Liu, Jingsha Zhao, Junkui Wang
Background: The previous studies have shown that individuals with hypertension and anxiety have a higher mean left ventricular mass index (LVMI) and QTc dispersion. We explored the associations between anxiety and left ventricular hypertrophy (LVH) and between anxiety and transmural dispersion of repolarization (TDR) (as detected by T peak-T end interval/QT interval, Tp-Te/QT ratio) in patients with hypertension. Methods: A total of 353 patients with uncomplicated hypertension from the Shaanxi Provincial People's Hospital were enrolled between 2017 and 2021...
2022: Frontiers in Cardiovascular Medicine
https://read.qxmd.com/read/35753985/predicting-patients-with-troponin-positive-chest-pain-and-unobstructed-coronary-arteries-with-electrocardiogram-troponin-kinetics-and-grace-score
#23
JOURNAL ARTICLE
Karan Rao, Kasun De Silva, Ashish Sood, A Robert Denniss, Chi-Jen Hsu
BACKGROUND: Troponin positive chest-pain with unobstructed coronary arteries (TPCP-UCA), occurs in 6% of cases of patients presenting with acute coronary syndrome (ACS). Whilst TPCP-UCA patients are known to be younger with less cardiovascular risk factors when compared to obstructive coronary disease (MICAD), no validated methods exist to reliably delineate these two conditions prior to coronary angiography. METHODS: We analysed 142 patients with MICAD and 127 patients with TPCP-UCA from 2015 to 2019...
September 2022: Heart, Lung & Circulation
https://read.qxmd.com/read/35606812/cardiac-repolarization-abnormalities-in-children-with-familial-mediterranean-fever
#24
JOURNAL ARTICLE
Yomna Farag, Shaimaa Sayed, Fatma Alzhraa Mostafa, Huda Marzouk, Raghda H Mohamed, Rodina Sobhy
BACKGROUND: Familial Mediterranean fever (FMF) is an autoinflammatory disease that can have conduction disturbances and cardiac rhythm disorders as manifestations of cardiac involvement. The aim of the study is to assess the susceptibility of children with FMF to cardiac repolarization abnormalities and therefore arrhythmia in children with FMF. METHODS: A cross sectional study conducted on 60 children had FMF and 40 age and sex matched healthy controls. Cardiac repolarization markers, cardiac dimensions and functions were assessed by electrocardiogram (ECG) and conventional echocardiography in patients and controls...
May 23, 2022: Pediatric Rheumatology Online Journal
https://read.qxmd.com/read/35525424/effects-of-%C3%AE-blockers-on-ventricular-repolarization-documented-by-24-hour-electrocardiography-in-long-qt-syndrome-type-2
#25
JOURNAL ARTICLE
Mikael Koponen, Annukka Marjamaa, Heikki Väänänen, Annukka M Tuiskula, Kimmo Kontula, Heikki Swan, Matti Viitasalo
BACKGROUND: Long QT syndrome (LQTS) is an inherited arrhythmia disorder characterized by ventricular repolarization abnormalities and a risk of sudden cardiac death. The electrophysiological components generating the high risk of arrhythmias in LQTS are prolonged repolarization, increased dispersion of repolarization, and early afterdepolarizations, which are clinically estimated as QT interval, T-wave peak to T-wave end (TPE) interval, and T2/T1-wave amplitude ratio, respectively. In experimental LQTS type 2 (LQT2) models, β-blockers decrease dispersion of repolarization and prevent early afterdepolarizations...
September 2022: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://read.qxmd.com/read/35048183/plasma-potassium-concentration-and-cardiac-repolarisation-markers-t-peak-t-end-and-t-peak-t-end-qt-during-and-after-exercise-in-healthy-participants-and-in-end-stage-renal-disease
#26
JOURNAL ARTICLE
Cao Thach Tran, Tania Atanasovska, Claus Graff, Jacob Melgaard, Jørgen K Kanters, Robert Smith, Aaron C Petersen, Keld P Kjeldsen, Michael J McKenna
PURPOSE: The cardiac T-wave peak-to-end interval (Tpe ) is thought to reflect dispersion in ventricular repolarisation, with abnormalities in Tpe associated with increased risk of arrhythmia. Extracellular K+ modulates cardiac repolarisation, and since arterial plasma K+ concentration ([K+ ]) rapidly increases during and declines following exercise, we investigated the relationship between [K+ ] and Tpe with exercise. METHODS: Serial ECGs (Tpe , Tpe /QT ratio) and [K+ ] were obtained from 8 healthy, normokalaemic volunteers and 22 patients with end-stage renal disease (ESRD), at rest, during, and after exhaustive exercise...
January 20, 2022: European Journal of Applied Physiology
https://read.qxmd.com/read/35005792/ventricular-repolarization-heterogeneity-in-patients-with-covid-19-original-data-systematic-review-and-meta-analysis
#27
JOURNAL ARTICLE
Elham Mahmoudi, Reza Mollazadeh, Pejman Mansouri, Mohammad Keykhaei, Shayan Mirshafiee, Behnam Hedayat, Mojtaba Salarifar, Matthew F Yuyun, Hirad Yarmohammadi
BACKGROUND: Coronavirus disease-2019 (COVID-19) has been associated with an increased risk of acute cardiac events. However, the effect of COVID-19 on repolarization heterogeneity is not yet established. In this study, we evaluated electrocardiogram (ECG) markers of repolarization heterogeneity in patients hospitalized with COVID-19. In addition, we performed a systematic review and meta-analysis of the published studies. METHODS: QT dispersion (QTd), the interval between T wave peak to T wave end (TpTe), TpTe/QT (with and without correction), QRS width, and the index of cardio-electrophysiological balance (iCEB) were calculated in 101 hospitalized COVID-19 patients and it was compared with 101 non-COVID-19 matched controls...
January 2022: Clinical Cardiology
https://read.qxmd.com/read/34623560/evaluation-of-electrocardiography-echocardiography-and-cardiac-t2-for-cardiac-complications-in-beta-thalassemia-major
#28
JOURNAL ARTICLE
Fadime Ersoy Dursun, Gönül Açıksarı, Serçin Özkök, Onur İncealtın
Cardiac complications such as heart failure and arrhythmias caused by "iron-induced" cardiomyopathy are considered as the primary cause of death in the patients with β-thalassemia major. The aim of this study was to evaluate electrocardiography, echocardiography according cardiac T2* and ferritin findings of patients followed-up for β-thalassemia major, and to investigate the importance of these findings for early detection of cardiac complications. The study included 41 patients and 25 healthy individuals with matched age and gender...
October 8, 2021: International Journal of Cardiovascular Imaging
https://read.qxmd.com/read/34595853/electrocardiographic-manifestations-in-patients-with-covid-19-daegu-in-south-korea
#29
JOURNAL ARTICLE
Han-Joon Bae, Hyun Jun Cho, Chan-Hee Lee, Myung Hwan Bae, Hyoung-Seob Park, Byung Chun Jung, Dong-Gu Shin, Yongkeun Cho, Jongmin Hwang, Seongwook Han, Kyu-Hwan Park, Se Yong Jang, Young Soo Lee
BACKGROUND AND OBJECTIVES: As the coronavirus disease 2019 (COVID-19) spreads worldwide, cardiac injury in patients infected with COVID-19 becomes a significant concern. Thus, this study investigates the impact of several electrocardiogram (ECG) parameters and disease severity in COVID-19 patients. METHODS: Seven medical centers in Daegu admitted 822 patients with COVID-19 between February and April 2020. This study examined 267 patients among them who underwent an ECG test and evaluated their biochemical parameters like C-reactive protein (CRP), log N-terminal pro-B-type Natriuretic Peptide (NT-proBNP), cardiac enzyme, and ECG parameters (heart rate, PR interval, QRS interval, T inversion, QT interval, and Tpe [the interval between peak to end in a T wave])...
October 2021: Korean Circulation Journal
https://read.qxmd.com/read/34461839/evaluation-of-tp-e-interval-tp-e-qt-ratio-and-index-of-cardiac-electrophysiological-balance-in-patients-with-tinnitus
#30
JOURNAL ARTICLE
Hakan Kaya, Arif Suner, Mehtap Koparal, S Cem Yucetas, Safiye Kafadar
BACKGROUND: Tinnitus is a common auditory symptom. Dysfunction in the autonomic nervous system (ANS) is an essential part of the etiopathogenesis of tinnitus. ANS regulates heart rate and heart rhythm and can lead to ventricular repolarization changes, which can cause malignant ventricular arrhythmias. T wave peak-to-end T(p-e) interval and T(p-e)/QT ratio are known ventricular arrhythmia indexes, and the index of cardiac-electrophysiological balance (iCEB) is a novel index that can be used to predict the risk of malignant ventricular arrhythmia...
August 30, 2021: BMC Cardiovascular Disorders
https://read.qxmd.com/read/34394241/acute-effects-of-electronic-cigarette-smoking-on-ventricular-repolarization-in-adults
#31
JOURNAL ARTICLE
Vahit Demir, Siho Hidayet, Yaşar Turan, Hüseyin Ede
Background: Electronic cigarette (e-cigarette) use is constantly increasing. However, the association between e-cigarette use and ventricular arrhythmia is unknown. Thus, in this study, we aimed to evaluate the markers of ventricular repolarization such as QT interval, corrected QT (QTc), QT dispersion (QTd), peak-to-end interval of the T wave (Tp-e), corrected Tp-e and Tp-e/QT ratios in e-cigarette users. Methods: The study population consisted 36 e-cigarette users and 40 healthy subjects...
December 2020: African Health Sciences
https://read.qxmd.com/read/34271131/repolarization-and-ventricular-arrhythmia-during-targeted-temperature-management-post-cardiac-arrest
#32
JOURNAL ARTICLE
Jakob Hartvig Thomsen, Christian Hassager, David Erlinge, Niklas Nielsen, Matias Greve Lindholm, John Bro-Jeppesen, Johannes Grand, Steen Pehrson, Claus Graff, Lars V Køber, Jesper Kjaergaard
BACKGROUND: Targeted temperature management (TTM) following out-of-hospital cardiac arrest (OHCA) prolongs the QT-interval but our knowledge of different temperatures and risk of arrhythmia is incomplete. OBJECTIVE: To assess whether the QTc, QT-peak (QTp) and T-peak to T-end interval (TpTe) may be useful markers of ventricular arrhythmia in contemporary post cardiac arrest treatment. METHODS: An ECG-substudy of the TTM-trial (TTM at 33°C vs...
July 13, 2021: Resuscitation
https://read.qxmd.com/read/34218730/evaluation-of-index-of-cardio-electrophysiological-balance-in-patients-with-coronary-slow-flow
#33
JOURNAL ARTICLE
Lutfu Askin, Okan Tanrıverdi
BACKGROUND: Coronary slow flow (CSF) is defined as the late progression of applied contrast through coronary arteries. The cardiac electrophysiological balance index (iCEB) reflects the balance between ventricular depolarisation and repolarisation and provides more information about ventricular arrhythmogenesis (VA) than other electrocardiography (ECG) parameters (QT, corrected QT [QTc], etc.). AIM: We aimed to evaluate iCEB in patients with CSF. METHODS: We divided the study population into two groups as CSF and control...
June 2022: Acta Cardiologica
https://read.qxmd.com/read/34127248/long-term-prognostic-significance-of-ventricular-repolarization-dispersion-in-patients-with-cardiac-sarcoidosis
#34
JOURNAL ARTICLE
Yuta Kobayashi, Toshiyuki Nagai, Sakae Takenaka, Yoshiya Kato, Hirokazu Komoriyama, Nobutaka Nagano, Kiwamu Kamiya, Takao Konishi, Takuma Sato, Kazunori Omote, Shingo Tsujinaga, Hiroyuki Iwano, Kengo Kusano, Satoshi Yasuda, Hisao Ogawa, Hatsue Ishibashi-Ueda, Toshihisa Anzai
Cardiac sarcoidosis (CS) is frequently complicated by fatal ventricular arrhythmias. T-peak to T-end interval to QT interval ratio (TpTe/QT) on electrocardiograms (ECG) was proposed as a marker of ventricular repolarization dispersion. Although this ratio could be associated with the incidence of ventricular arrhythmias in cardiovascular diseases, its prognostic implication in patients with CS is unclear. We sought to investigate whether TpTe/QT was associated with long-term clinical outcomes in patients with CS...
June 11, 2021: American Journal of Cardiology
https://read.qxmd.com/read/34125412/evaluation-of-electrocardiographic-parameters-and-the-presence-of-interatrial-block-in-patients-with-mad-honey-intoxication
#35
JOURNAL ARTICLE
Altuğ Ösken, Ercan Aydın, Kazım Serhan Özcan, Selçuk Yaylacı
Mad honey intoxication (MHI) is a food-induced clinical condition that usually presents with cardiovascular symptoms and can lead to life-threatening arrhythmias if not diagnosed and treated early. No data exist in the literature on the presence of interatrial block (IAB) after food intoxication. In our study, we sought to investigate atrioventricular electrocardiography (ECG) parameters and determine the frequency of IAB in patients with MHI. In total, 76 patients diagnosed with MHI were included in our retrospective study...
June 14, 2021: Cardiovascular Toxicology
https://read.qxmd.com/read/33812131/t-wave-peak-end-interval-and-ratio-of-t-wave-peak-end-and-qt-intervals-novel-arrhythmogenic-and-survival-markers-for-dogs-with-myxomatous-mitral-valve-disease
#36
JOURNAL ARTICLE
B C P Vila, A A Camacho, M G Sousa
INTRODUCTION/OBJECTIVES: In the past few years, novel markers such as the interval between the peak and the end of T-wave (Tpte) and Tpte/QT ratio have been shown to have high sensitivity for ventricular arrhythmias and mortality. We analyzed these and other parameters of ventricular repolarization, such as QT interval, QT interval corrected for heart rate (QTc), and QT dispersion (QTd) in dogs with myxomatous mitral valve disease (MMVD). Additionally, we investigated their relationship with the progression of the disease, echocardiographic parameters, and ventricular arrhythmias and assessed their prognostic value with development of clinical signs or mortality as the final outcome...
June 2021: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://read.qxmd.com/read/33709919/evaluation-of-tp-e-interval-and-tp-e-qt-and-tp-e-qtc-ratios-in-patients-infected-with-hiv-and-using-antiretroviral-therapy
#37
JOURNAL ARTICLE
Şükrü Çetin, Ayşe Şabablı Çetin, Emine Altuntaş, Ali Bayraktar
OBJECTIVE: Sudden cardiac death (SCD) is one of the causes of death among patients infected with human immunodeficiency virus (HIV). The T peak to T end interval (Tp-e interval) is a parameter that is used in the prediction of SCD. The aim of this study was to investigate the difference in Tp-e interval and Tp: QT and Tp: corrected QT interval (QTc) ratios between patients infected with HIV and healthy individuals as well as in other factors affecting patients infected with HIV. METHODS: A total of 83 patients infected with HIV with negative HIV ribonucleic acid (RNA) levels who were receiving antiretroviral therapy (ART) and 83 healthy individuals were included in this study...
March 2021: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://read.qxmd.com/read/33690204/arrhythmia-risk-profile-and-ventricular-repolarization-indices-in-covid-19-patients-a-systematic-review-and-meta-analysis
#38
JOURNAL ARTICLE
Alexander Edo Tondas, Rido Mulawarman, Monica Trifitriana, Siti Nurmaini, Irfannuddin Irfannuddin
INTRODUCTION: Coronavirus disease 2019 (COVID-19) has been associated with cardiac arrhythmias. Several electrocardiographic markers have been used to predict the risk of arrhythmia in patients with COVID-19. We aim to investigate the electrocardiographic (ECG) ventricular repolarization indices in patients with COVID-19. METHODOLOGY: We performed a comprehensive systematic literature search from PubMed, EuropePMC, SCOPUS, Cochrane Central Database, and Google Scholar Preprint Servers...
March 7, 2021: Journal of Infection in Developing Countries
https://read.qxmd.com/read/33646333/effect-of-noise-on-the-electrocardiographic-parameters
#39
JOURNAL ARTICLE
Mustafa Begenc Tascanov, Suzan Havlioglu, Zulkif Tanriverdi, Fatih Gungoren, İbrahim Halil Altiparmak
PURPOSE: Noise, defined as any sound that is unpleasant, is one of the most important environmental problems. Prolonged exposure to noise has been shown to be associated with the development of cardiovascular diseases. No study investigated the effect of noise on surface electrocardiography (ECG). AIMS: The aim of our study is to investigate the effect of noise on surface ECG parameters including P-wave dispersion (PWD), QT intervals, corrected QT interval (QTc), T-wave peak to end (Tp-e) interval, and Tp-e/QT and Tp-e/QTc ratios...
March 1, 2021: International Archives of Occupational and Environmental Health
https://read.qxmd.com/read/33552182/determination-of-acute-changes-in-new-electrocardiography-parameters-during-veno-venous-extracorporeal-membrane-oxygenation-support
#40
JOURNAL ARTICLE
Hakan Göçer, Ahmet Baris Durukan, Erdinç Naseri, Mustafa Ünal
Introduction: Veno-venous extracorporeal membrane oxygenation (ECMO) support has been used for respiratory insufficiency. Its role in blood oxygenation has been well documented. However, the effects on myocardial electrophysiology have not been studied in detail. Aim: To reveal the acute effects of extracorporeal support on new electrocardiography (ECG) parameters in patients with preserved left ventricular functions. Material and methods: This retrospective study was conducted in three separate clinics...
December 2020: Polish Journal of Cardio-Thoracic Surgery
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