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t peak to t end /qt ratio

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https://www.readbyqxmd.com/read/29399929/electrocardiographic-parameters-effectively-predict-ventricular-tachycardia-fibrillation-in-acute-phase-and-abnormal-cardiac-function-in-chronic-phase-of-st-segment-elevation-myocardial-infarction
#1
Ziqing Yu, Zhangwei Chen, Yuan Wu, Ruizhen Chen, Minghui Li, Xueying Chen, Shengmei Qin, Yixiu Liang, Yangang Su, Junbo Ge
BACKGROUND: Abnormal cardiac repolarization is closely associated with ventricular tachycardia/ventricular fibrillation (VT/VF). Myocardial ischemia and infarction aggravate cardiac repolarization dispersion, and VT/VF could be lethal in the early stage of ST-segment elevation myocardial infarction (STEMI). Unfortunately, VT/VF cannot be effectively predicted in current clinical practice. The present study aimed to assess electrocardiographic parameters of the sinus rhythmic complex in relation to cardiac repolarization, e...
February 5, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29369370/evaluation-of-qt-dispersion-and-tp-e-interval-in-children-with-subclinical-hypothyroidism
#2
Alper Akın, Edip Unal, Ruken Yıldırım, Mehmet Türe, Hasan Balık, Yusuf Kenan Haspolat
BACKGROUND: Studies on adults, have shown increased dispersion of QT and corrected QT (cQT), peak-to-end interval of the T wave (Tp-e), Tp-e/QT ratio and Tp-e/QTc ratio in subclinical hypothyroidism (SH), but there have been no paediatric studies MATERIALS AND METHODS: A total of 40 SH patients were compared with 40 healthy children in respect of serum thyroid stimulating hormone (TSH), serum free level of triiodothyronine (fT3) and free level of thyroxine (fT4). SH diagnosis was accepted as TSH above the laboratory accepted upper limit (> 4...
January 25, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29361256/the-effect-of-sevoflurane-on-the-transmural-dispersion-of-repolarisation-in-patients-with-type-2-diabetes-mellitus-a-prospective-observational-study
#3
V Thiruvenkatarajan, J Jeyadoss, V Rao Kadam, L Y Du, W-M Liu, R M Van Wijk
The 'torsadogenic' property of a drug is linked to its ability to increase the transmural dispersion of repolarisation, represented by the interval between the peak of, and the end of, the T-wave (Tp-e interval) in an electrocardiogram. Reports have consistently shown that sevoflurane does not increase the Tp-e interval. Type 2 diabetes is a risk factor for increased QTc (rate-corrected QT interval), QTcd (rate-corrected QTc dispersion: difference between the maximum and the minimum QTc interval), and Tp-e, as well as the rate-corrected Tp-e (Tp-e/QTc ratio)...
January 2018: Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/29225104/evaluation-of-qt-dispersion-and-t-peak-to-t-end-interval-in-patients-with-early-stage-sarcoidosis
#4
Hacı Ahmet Kasapkara, Ayşegül Şentürk, Emine Bilen, Hüseyin Ayhan, Bilge Duran Karaduman, Zeynep Şeyma Turinay, Murat Can Güney, Tahir Durmaz, Telat Keleş, Engin Bozkurt
INTRODUCTION AND AIM: Sarcoidosis increases inhomogeneity in ventricular repolarization due to the presence of sarcoid granuloma, which significantly correlates with ventricular fibrillation. Various studies have suggested that the interval from the peak to the end of the electrocardiographic T wave (T-peak to T-end [Tpe] interval) may correspond to the transmural dispersion of repolarization and that increased Tpe interval and Tpe/QT ratio are associated with malignant ventricular arrhythmias...
December 7, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29151301/assessment-of-repolarization-abnormalities-in-baseline-electrocardiograms-of-patients-with-myocarditis
#5
Hacı Murat Güneş, Gamze Babur Güler, Ekrem Güler, Gültekin Günhan Demir, Mehmet Kamil Teber, Filiz Kızılırmak, Beytullah Çakal, Bilal Boztosun
Background/aim: Myocarditis in the acute phase usually presents with sinus tachycardia but many other arrhythmias might be seen as well. In this study we aimed to investigate repolarization abnormalities in baseline ECG of patients with myocarditis for the first time.Materials and methods: Thirty patients diagnosed with myocarditis and 25 healthy age-matched controls were included. Two different cardiologists measured corrected QT (QTc), QT dispersion (QTd), QT peak (QTp), T wave peak to T wave end (TpTe), TpTe/QT ratio, and TpTe/QTc ratio in 12-lead ECG...
November 13, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29030380/association-between-qt-interval-components-and-sudden-cardiac-death-the-aric-study-atherosclerosis-risk-in-communities
#6
MULTICENTER STUDY
Wesley T O'Neal, Matthew J Singleton, Jason D Roberts, Larisa G Tereshchenko, Nona Sotoodehnia, Lin Y Chen, Gregory M Marcus, Elsayed Z Soliman
BACKGROUND: Several reports have demonstrated that prolongation of the QT interval is associated with sudden cardiac death (SCD). However, it is unknown whether any of the components within the QT interval are responsible for its association with SCD. METHODS AND RESULTS: We examined the association of the individual QT-interval components (R-wave onset to R-peak, R-peak to R-wave end, ST-segment, T-wave onset to T-peak, and T-peak to T-wave end) with SCD in 12 241 participants (54±5...
October 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28759086/assessment-of-myocardial-repolarisation-parameters-in-patients-with-familial-mediterranean-fever
#7
Kayihan Karaman, Metin Karayakali, Ertuğrul Erken, Ahmet Demirtaş, Mustafa Öztürk, Fatih Altunkaş, Arif Arisoy, Oğuzhan Ekrem Turan, Köksal Ceyhan, Ataç Çelik
BACKGROUND: Familial Mediterranean fever (FMF) is a chronic, recurrent auto-inflammatory disease characterised by self-terminating attacks of fever and sterile polyserositis. The main cause of death in auto-inflammatory diseases is cardiovascular events. Additionally, auto-inflammatory diseases have potential effects on the myocardial repolarisation parameters, including the T-wave peak-to-end (Tp-Te) interval, cTp-Te interval (corrected Tp-Te) and the cTp-Te/QT ratio. The aim of this study was to analyse the efficacy of myocardial repolarisation alterations in anticipation of cardiovascular risks in patients with FMF...
May 2017: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/28694394/assessment-of-electrocardiographic-parameters-in-adult-patients-undergoing-extracorporeal-shockwave-lithotripsy
#8
Gündüz Durmuş, Muhsin Kalyoncuoğlu, Mehmet Baran Karataş, Yiğit Çanga, Semi Öztürk, Ender Özal, Yasin Çakıllı, Tuncay Kırış, Barış Güngör, Ahmet Taha Alper, Mehmet Mustafa Can, Osman Bolca
OBJECTIVE: Extracorporeal shock wave lithotripsy (ESWL) is a safe and effective treatment for urinary tract calculi. While serious side effects are rare, transient cardiac arrhythmias may occur. New electrocardiographic (ECG) parameters, such as P wave dispersion (PWD), QT dispersion (QTd), T peak to T end (Tp-e) interval, Tp-e interval/QT ratio, and Tp-e interval/corrected QT ratio have been defined to help predict atrial and ventricular arrhythmias. However, effect of ESWL on these ECG parameters has not been previously investigated...
July 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28449908/association-of-sleep-disordered-breathing-and-disturbed-cardiac-repolarization-in-patients-with-st-segment-elevation-myocardial-infarction
#9
Christoph Fisser, Alina Marcinek, Andrea Hetzenecker, Kurt Debl, Andreas Luchner, Ulrich Sterz, Jörg Priefert, Florian Zeman, Malcolm Kohler, Lars S Maier, Stefan Buchner, Michael Arzt
OBJECTIVE: In patients with ST-segment elevation myocardial infarction (STEMI), disturbed cardiac repolarization before percutaneous coronary intervention (PCI) is a risk factor for malignant ventricular arrhythmia. We tested the hypothesis that sleep-disordered breathing (SDB) in patients with STEMI is associated with disturbed cardiac repolarization. METHODS: Thirty-three patients with STEMI who underwent PCI were prospectively enrolled. To assess cardiac repolarization, the heart-rate corrected interval from the peak of the T wave to the end of the T wave (TpTec) and QTc intervals were assessed with 12-lead electrocardiography before PCI, within 24 h after PCI, and 12 weeks after PCI...
May 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28377800/evaluation-of-tp-e-interval-tp-e-qt-ratio-and-tp-e-qtc-ratio-in-patients-with-subclinical-hypothyroidism
#10
Ahmet Gürdal, Hatice Eroğlu, Füsun Helvaci, Mutlu Çağan Sümerkan, Kamber Kasali, Şükrü Çetin, Gökhan Aksan, Kadriye Kiliçkesmez
BACKGROUND: Prolongation of the peak-to-end interval of the T wave (Tp-e) has been reported as associated with ventricular arrhythmias. The aim of this study was to investigate the ventricular repolarization by using the Tp-e interval, Tp-e/QT ratio and Tp-e/ QTc ratio in patients with subclinical hypothyroidism (SH). METHODS: We studied 56 volunteers: These were 28 patients with SH (mean age 45 ± 11 years) and 28 healthy subjects (mean age 34 ± 8 years). All basic biochemical parameters were analyzed and electrocardiograms (ECGs) were recorded...
March 2017: Therapeutic Advances in Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28315570/tp-e-interval-and-tp-e-qtc-ratio-as-novel-surrogate-markers-for-prediction-of-ventricular-arrhythmic-events-in-hypertrophic-cardiomyopathy
#11
Mehmet Kadri Akboğa, Kevser Gülcihan Balcı, Samet Yılmaz, Selahattin Aydın, Çağrı Yayla, Ahmet Göktuğ Ertem, Sefa Ünal, Mustafa Mücahit Balcı, Yücel Balbay, Dursun Aras, Serkan Topaloğlu
OBJECTIVE: Hypertrophic cardiomyopathy (HCM) as a common genetic heart disease characterized by ventricular hypertrophy and myocardial fibrosis is significantly associated with a higher risk of fatal ventricular arrhythmic events (VAEs). We aimed to assess the interval between the peak and the end of the electrocardiographic T wave (Tp-e) and Tp-e/corrected QT (QTc) ratio as candidate markers of ventricular arrhythmias in patients with HCM. METHODS: In this single-center, prospective study, a total of 66 patients with HCM and 88 controls were enrolled...
July 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28274540/the-effect-of-metilpheniydate-risperidone-and-combination-therapy-on-ecg-in-children-with-attention-deficit-hyperactivity-disorder
#12
Derya Karpuz, Olgu Hallioglu, Fevziye Toros, Bahar Tasdelen
INTRODUCTION: This study is to investigate ventricular repolarization on electrocardiogram (ECG) in a pediatric population receiving methylphenidate (MPH), risperidone (RIS) and combined therapy. METHODS: A total of 215 patients between 6 and 12years with ADHD/conduct disorder receiving methylphenidate, risperidone and combined therapy for minimum 3months and an untreated ADHD group (n=76) was consecutively included in the study. Twelve lead ECG parameters including mean QT, QTc, T-peak to T-end (TpTe) intervals, TpTe dispersion and TpTe/QT ratio were compared...
July 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28121344/impact-of-myocardial-blush-grade-on-tpe-interval-and-tpe-qt-ratio-after-successful-primary-percutaneous-coronary-intervention-in-patients-with-st-elevation-myocardial-infarction
#13
P T Duyuler, S Duyuler, M Demir
INTRODUCTION: Myocardial perfusion, when assessed by myocardial blush grade (MBG) is an independent predictor of major adverse cardiac outcomes. The terminal part of repolarization, measured as the interval from the peak to the end of the T wave (Tpe), is a relatively novel indicator of ventricular arrhythmias. The relations between MBG and Tpe interval have not been examined before. We aimed to evaluate the relationship between MBG and Tpe and Tpe/QT ratio after successful primary percutaneous coronary intervention (PCI) in acute ST-segment elevation myocardial infarction (STEMI)...
January 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28110482/the-evaluation-of-a-new-marker-of-transmyocardial-repolarization-parameters-in-ischemic-stroke-patients-t-peak-t-end-t-p-e-t-p-e-qtc
#14
Emine Emektar, Şeref Kerem Çorbacıoğlu, Osman Korucu, Selma Ramadan, Hüseyin Uzunosmanoğlu, Eda Kan, Yunsur Çevik
The cardiovascular manifestations of acute ischemic stroke have been well known. Several electrocardiography (ECG) abnormalities have been reported in patients following acute stroke, including QT interval prolongation, ST segment deviation and T-wave changes. This study aimed to investigate the changes in transmyocardial repolarization parameters, in ischemic stroke patients. The study is a prospective, blind, and controlled clinical study. The patients without cardiac disease who received ischemic stroke diagnoses were included in the study...
January 21, 2017: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/28100427/the-possible-role-of-propofol-in-drug-induced-torsades-de-pointes-a-real-world-single-center-analysis
#15
Victor A Abrich, Harish Ramakrishna, Arjun Mehta, Farouk Mookadam, Komandoor Srivathsan
BACKGROUND: Torsades de pointes (TdP) is a polymorphic ventricular tachycardia associated with QT prolongation. Propofol is a sedative-anesthetic with proarrhythmic effects on cardiac myocytes. We performed a retrospective study to determine the incidence of TdP following propofol exposure at Mayo Clinic (Rochester, MN) from 08/11/1998-11/20/2015. METHODS: We queried our database using key search terms to identify patients exposed to propofol who developed TdP perioperatively or during non-surgical sedation...
April 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28071178/psychotropic-drugs-and-ventricular-repolarisation-the-effects-on-qt-interval-t-peak-to-t-end-interval-and-qt-dispersion
#16
Tiziano Acciavatti, Giovanni Martinotti, Mariangela Corbo, Eduardo Cinosi, Matteo Lupi, Fabrizio Ricci, Rosa Di Scala, Emilia D'Ugo, Viola De Francesco, Raffaele De Caterina, Massimo di Giannantonio
OBJECTIVE: We aimed to investigate in a clinical setting, the effects of different classes of psychotropic drugs on cardiac electrophysiological measures linked with an increased risk of sudden cardiac death. METHODS: We conducted a cross-sectional study in a population of 1059 psychiatric inpatients studying the effects of various psychotropic drugs on the T-peak to T-end (TpTe) interval, QT dispersion and QT interval. RESULTS: Methadone use showed a strong association with TpTe prolongation (odds ratio (OR)=12...
April 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/27904512/evaluation-of-inhomogeneities-of-repolarization-in-patients-with-psoriasis-vulgaris
#17
Korhan Soylu, Sinan İnci, Gökhan Aksan, Gökay Nar, Esra Pancar Yüksel, Hande Serra Ocal, Mustafa Çapraz, Serkan Yüksel, Mahmut Şahin
INTRODUCTION: The arrhythmia potential has not been investigated adequately in psoriatic patients. In this study, we assessed the ventricular repolarization dispersion, using the Tp-e interval and the Tp-e/QT ratio, and investigated the association with inflammation. MATERIAL AND METHODS: Seventy-one psoriasis vulgaris patients and 70 age- and gender-matched healthy individuals were enrolled in the study. The severity of the disease was calculated using Psoriasis Area and Severity Index scoring...
December 1, 2016: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/27610610/evaluation-of-tp-e-interval-tp-e-qt-ratio-and-tp-e-qtc-ratio-in-patients-with-asymptomatic-arrhythmogenic-right-ventricular-cardiomyopathy
#18
Elnur Alizade, Mahmut Yesin, Mehmet Vefik Yazicioğlu, Ekrem Bilal Karaayvaz, Adem Atici, Şükrü Arslan, Anıl Avci, Göksel Acar, Mustafa Tabakci, Servet Izci, Selçuk Pala
BACKGROUND: Arrhythmogenic right ventricular dysplasia (ARVD) is characterized by progressive replacement of ventricular myocytes with variable amounts of fibrous and adipose tissue. Several studies have suggested that the interval from the peak to the end of the electrocardiographic T wave (Tp-e) may correspond to the transmural dispersion of repolarization and that increased Tp-e interval and Tp-e/QT ratio are associated with malignant ventricular arrhythmias. The aim of this study was to evaluate repolarization dispersion measured from the 12-lead surface electrocardiogram (including Tp-e interval, Tp-e/QT, and Tp-e/QTc ratio) in asymptomatic ARVD patients METHODS: We selected 27 patients with asymptomatic ARVD and 27 age- and gender-match young, healthy volunteers...
January 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/27554253/variability-of-myocardial-repolarization-in-pediatric-patients-with-a-ventricular-septal-defect
#19
Hidetoshi Uchida, Miki Nishio, Yumi Omeki, Yuka Takeuchi, Rina Nagata, Shota Oikawa, Arisa Nagatani, Yoshihiko Eryu, Tadayoshi Hata, Tetsushi Yoshikawa
In patients with a ventricular septal defect, left-to-right shunting increases the left ventricular preload. This pathological change affects myocardial depolarization and repolarization and has the potential to evoke arrhythmogenic substrates. We examined the effect of ventricular septal defects on myocardial repolarization by investigating the variability in the repolarization interval. This retrospective study included 19 patients (mean age, 1.8 ± 2.1 years) who underwent surgical closure (mean left-to-right shunt ratio, 2...
December 2016: Pediatric Cardiology
https://www.readbyqxmd.com/read/27441471/electrocardiographic-abnormalities-and-arrhythmic-risk-markers-in-adult-patients-with-beta-thalassemia-major
#20
Marios Kolios, Panagiotis Korantzopoulos, Antonios P Vlahos, Eleni Kapsali, Evangelos Briasoulis, John A Goudevenos
BACKGROUND: There seems to be a significant arrhythmia burden in β-thalassemia major (TM) patients without overt cardiomyopathy. Apart from conventional electrocardiographic (ECG) and arrhythmic risk markers we studied novel markers of ventricular repolarization and autonomic imbalance both at rest and after exercise testing. METHODS: We studied 47 adult TM patients without systolic heart failure and 47 age and sex-matched healthy control subjects. The median age of the studied population was 36 [32-43] years, 57% men...
October 15, 2016: International Journal of Cardiology
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