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QRS Fragment

Nuray Kahraman Ay, Asim Enhos, Yasin Ay, Nijad Bakhshaliyev, Aydin Nadir, Erdem Karacop, Ilke Celikkale, Mahmut Uluganyan, Razaman Ozdemir, Omer Goktekin
BACKGROUND: Although transcatheter aortic valve implantation (TAVI) can successfully correct aortic narrowing, pre-existing pathophysiological alterations in the left ventricle are still a concern in terms of long-term mortality. This study aimed to examine the predictive role of fQRS morphology on long-term prognosis in patients undergoing TAVI due to severe aortic stenosis. METHODS: A total of 117 patients undergoing TAVI due to severe aortic stenosis were included in this retrospective cohort study...
November 2018: Journal of Electrocardiology
Yasuhiro Yokoyama, Hitoshi Hachiya, Tomonori Watanabe, Ayako Yokota, Takahiro Komori, Tomoyuki Kabutoya, Yasushi Imai, Kazuomi Kario
Idiopathic ventricular tachycardias (VTs) originating from the non-coronary cusp (NCC) are very rare. The previous reports suggested NCC-VTs were characterized by a narrower QRS duration and smaller III/II ratio than VTs originating from other coronary-cusps. We present a rare case of an NCC-VT with a local fragmented potential recorded at the NCC inconsistent with the known ECG characteristics of NCC-VTs.
November 9, 2018: Journal of Electrocardiology
Osman Bektaş, Ahmet Karagöz, Adil Bayramoğlu, Erdal Benli, Zeki Yüksel Günaydın, Mehmet Yaman, Ahmet Kaya
Purpose: The aim of this study was to investigate the association between fragmented QRS and left ventricular (LV) systolic function in patients with erectile dysfunction (ED). Methods: A total of 106 patients with ED and without a history of coronary artery disease (CAD) were compared with 54 age- and gender-matched healthy controls. LV systolic function was evaluated using speckle tracking echocardiography via global longitudinal strain (GLS) and global circumferential strain (GCS)...
November 2018: Acta Cardiologica Sinica
János Tomcsányi
An Asian patient was admitted with palpitation. The ECG showed coved-shaped type Brugada pattern with QRS-fragmentations. Early recognition and risk stratification are the most important issues in Brugada syndrome. Orv Hetil. 2018; 159(45): 1848-1850.
November 2018: Orvosi Hetilap
Chayapat Tangwiwat, Yodying Kaolawanich, Rungroj Krittayaphong
BACKGROUND: Electrocardiography (ECG) may be an efficacious diagnostic and prognostic tool in hypertrophic cardiomyopathy (HCM). This study aimed to investigate association between deep T-wave inversion (TWI) and apical HCM, and between fragmented QRS (fQRS) complex and myocardial fibrosis in patients with HCM. METHODS: Patients with documented HCM by cardiac magnetic resonance imaging (CMR) during 2005-2015 were studied. The 12-lead ECG and CMR were performed on the same day...
November 7, 2018: Annals of Noninvasive Electrocardiology
Kamil Gulsen, Orhan Ince, Gokmen Kum, Flora Ozkalayci, Irfan Sahin, Ertugrul Okuyan
BACKGROUND: Fragmented QRS evaluated in 12-derivation electrocardiography has widely been accepted as a sign of myocardial fibrosis. The prognostic value of that marker has been demonstrated, particularly, in cardiac diseases that accompany myocardial scar and fibrosis. Myocardial fibrosis is also an issue in patients with aortic stenosis. In this study, we wanted to determine whether fragmented QRS could predict all-cause mortality in aortic stenosis patients after transcatheter aortic valve replacement (TAVR)...
November 7, 2018: Annals of Noninvasive Electrocardiology
Griet Goovaerts, Sibasankar Padhy, Bert Vandenberk, Carolina Varon, Rik Willems, Sabine Van Huffel
OBJECTIVE: Fragmented QRS (fQRS) is an accessible biomarker and indication of myocardial scarring that can be detected from the electrocardiogram (ECG). Nowadays, fQRS scoring is done on a visual basis, which is time-consuming and leads to subjective results. This study proposes an automated method to detect and quantify fQRS in a continuous way using features extracted from Variational Mode Decomposition (VMD) and Phase-Rectified Signal Averaging (PRSA). METHODS: In the proposed framework, QRS complexes in the ECG signals were first segmented using VMD...
October 29, 2018: IEEE Journal of Biomedical and Health Informatics
Chanavuth Kanitsoraphan, Pattara Rattanawong, Poemlarp Mekraksakit, Pakawat Chongsathidkiet, Tanawan Riangwiwat, Napatt Kanjanahattakij, Wasawat Vutthikraivit, Saranapoom Klomjit, Subhanudh Thavaraputta
BACKGROUND: Recent studies suggested that fragmented (fQRS) is associated with poor clinical outcomes in heart failure with reduced ejection fraction (HFrEF) patients. However, no systematic review or meta-analysis has been done. We conducted a systematic review and meta-analysis to assess the association between baseline fQRS and all-cause mortality in HFrEF. METHODS: We comprehensively reviewed the databases of MEDLINE and EMBASE from inception to February 2018...
October 17, 2018: Annals of Noninvasive Electrocardiology
Bert Vandenberk, M Juhani Junttila, Tomas Robyns, Christophe Garweg, Joris Ector, Heikki V Huikuri, Rik Willems
BACKGROUND: Sudden cardiac death (SCD) results from a complex interplay of abnormalities in autonomic function, myocardial substrate and vulnerability. We studied whether a combination of noninvasive risk stratification tests reflecting these key players could improve risk stratification. METHODS: Patients implanted with an ICD in whom 24-hr holter recordings were available prior to implant were included. QRS fragmentation (fQRS) was selected as measure of myocardial substrate and a high ventricular premature beat count (VPB >10/hr) for arrhythmic vulnerability...
September 28, 2018: Annals of Noninvasive Electrocardiology
Jack T Reynard, Oluwayemisi M Oshodi, Jenny Lai, Rachel Lai, George Bazoukis, Nikolaos Fragakis, Konstantinos P Letsas, Panagiotis Korantzopoulos, Fang-Zhou Liu, Tong Liu, Yunlong Xia, Gary Tse, Ka H Li
The QT interval along with its heart rate corrected form (QTc) are well- established ECG markers that have been found to be associated with malignant ventricular arrhythmogenesis. However, extensive pre-clinical and clinical investigations over the years have allowed for novel clinical ECG markers to be generated as predictors of arrhythmogenesis and sudden cardiac death. Repolarization markers include the older QTc, QT dispersion and newer Tpeak - Tend intervals, (Tpeak - Tend) / QT ratios, T-wave alternans (TWA), microvolt TWA and T-wave area dispersion...
September 26, 2018: Minerva Cardioangiologica
Özal Yıldırım, Paweł Pławiak, Ru-San Tan, U Rajendra Acharya
This article presents a new deep learning approach for cardiac arrhythmia (17 classes) detection based on long-duration electrocardiography (ECG) signal analysis. Cardiovascular disease prevention is one of the most important tasks of any health care system as about 50 million people are at risk of heart disease in the world. Although automatic analysis of ECG signal is very popular, current methods are not satisfactory. The goal of our research was to design a new method based on deep learning to efficiently and quickly classify cardiac arrhythmias...
September 15, 2018: Computers in Biology and Medicine
Pauline Berthome, Romain Tixier, Jean Briand, Olivier Geoffroy, Dominique Babuty, Jacques Mansourati, Laurence Jesel, Jean-Marc Dupuis, Paul Bru, Florence Kyndt, Béatrice Guyomarch, Aurélie Thollet, Nathalie Behar, Philippe Mabo, Frédéric Sacher, Vincent Probst, Jean-Baptiste Gourraud
BACKGROUND: Studies in Brugada syndrome (BrS) have mainly consisted of men. OBJECTIVE: The purpose of this study was to describe the clinical characteristics and arrhythmic risk factors in BrS women. METHODS: Consecutive BrS patients were enrolled from 1993 and followed prospectively. RESULTS: Among 1613 patients, 494 were women (mean age 47 ± 16 years). Women were more frequently asymptomatic than men (423 [86%] vs 867 [77%], respectively; P = ...
September 5, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
Anna Kucharz, Piotr Kułakowski
BACKGROUND: Incidence of fragmented (fQRS) and predisposing factors in patients with implantable cardioverter-defibrillator (ICD) have not yet been established. Aim To examine incidence of fQRS, associated factors as well as predictive value in identifying site of coronary artery disease (CAD). METHODS: Consecutive patients with ICD. Retrospective analysis of demographic, clinical and ECG data. RESULTS: Of 382 patients, 163 (43%) had fQRS...
September 2018: Journal of Electrocardiology
Mehmet Eyuboglu, Akar Yilmaz, Onur Dalgic, Caner Topaloglu, Yavuz Karabag, Bahri Akdeniz
BACKGROUND: Fragmented QRS (fQRS) as a sign of myocardial fibrosis indicates adverse outcomes in various cardiovascular diseases. However, there are no clear data regarding relationship between obesity and fQRS. We aimed to investigate whether high body mass index (BMI) predicts fQRS on electrocardiography (ECG) independent of underlying cardiovascular status. METHODS: A total of 1530 patients were included into the study. Patients were divided into three groups according to BMI (normal, overweight and obese)...
September 2018: Journal of Electrocardiology
Mahmut Yesin, Metin Çağdaş, Macit Kalçık, İbrahim Rencüzoğulları, Yavuz Karabağ, Mustafa Ozan Gürsoy, Süleyman Karakoyun
BACKGROUND: Even though the relationship between syntax score (SS) and fragmented QRS (fQRS) has been studied, the relation between syntax score II (SS II) and fQRS in patients with ST elevation myocardial infarction (STEMI) is undefined. We aimed to define the relationship between fQRS and SS II for the evaluation of extension and complexity of coronary artery disease. MATERIAL AND METHODS: This study enrolled 167 patients undergoing primary percutaneous coronary intervention (pPCI) for STEMI...
September 2018: Journal of Electrocardiology
Tanawat Attachaipanich, Rungroj Krittayaphong
BACKGROUND: Fragmented QRS (fQRS) complex is an electrocardiographic pattern that reflects the inhomogeneity of ventricular depolarization. The aims of this study were to determine the prognostic significance of fQRS for predicting in-hospital life-threatening arrhythmic complications in ST-elevation myocardial infarction (STEMI) patients, and to identify the most appropriate duration of cardiac rhythm monitoring in STEMI patients with fQRS. METHODS: Patients diagnosed with and treated for STEMI at Siriraj Hospital (Bangkok, Thailand) during 2009-2012 were enrolled...
August 17, 2018: Annals of Noninvasive Electrocardiology
Orçun Çiftci, Suzan Keskin, Emir Karaçağlar, Kerem Can Yılmaz, Ayşe Aktaş, Siren Sezer, Gökhan Moray, İbrahim Haldun Müderrisoğlu, Mehmet Haberal
OBJECTIVES: Coronary artery disease is a major cause of mortality and morbidity after renal transplant. Fragmented QRS on standard 12-lead electrocardiograms has been proposed as a marker of myocardial scar, mainly due to coronary artery disease. Here, we aimed to investigate fragmented QRS to detect severe coronary artery disease in renal transplant candidates. MATERIALS AND METHODS: We retrospectively reviewed the medical records of 534 patients with end-stage renal failure who were on the deceased-donor renal transplant wait list at Başkent University Faculty of Medicine due to having no living kidney donor available...
July 31, 2018: Experimental and Clinical Transplantation
Guo-Liang Li, Ardan M Saguner, Guy H Fontaine, Robert Frank
BACKGROUND: Bradycardia-induced torsade de pointes (TdP) tachycardia in patients with spontaneous high-degree atrioventricular block (AVB) is common. The aim of this study was to analyze endocardial recordings during TdP in spontaneous high-degree AVB in humans to better understand the electrophysiological mechanisms underlying this phenomenon. METHODS: The study group consisted of 5 patients with typical episodes of TdP during spontaneous high-degree AVB. A standard (USCI) temporary bipolar endocardial catheter positioned at the apex of the right ventricle (RV) and bipolar chest leads from two precordial leads V1 and V4 were used to record the tracings during TdP...
July 16, 2018: Cardiology Journal
Derek S Chew, Stephen B Wilton, Katherine Kavanagh, Haris M Vaid, Danielle A Southern, Linda Ellis, Andrew G Howarth, James A White, Derek V Exner
BACKGROUND: Recovery of left ventricular ejection fraction (LVEF) after acute myocardial infarction (MI) is not universal and is difficult to predict. Fragmented QRS (fQRS) complexes are thought to be markers of myocardial scar. We hypothesized that fQRS complexes on 12‑lead surface ECGs during the initial post-MI period would be associated with adverse LV remodeling over the following year. METHODS: Change in LVEF between the early (0-2 month) and later (2-12 month) post-MI periods was assessed in two independent cohorts of post-MI patients with initial LV dysfunction...
July 2018: Journal of Electrocardiology
Wei Xia, Xiao-Yan Feng
BACKGROUND ST-segment elevation myocardial infarction (STEMI) is an acute and life-threatening disease. Adverse cardiac events (ACEs) are defined as cardiovascular death or worsening congestive heart failure in STEMI patients. The present study investigated the predictive role of fragmented QRS complex (fQRS) in risks of ACEs in STEMI. MATERIAL AND METHODS This study was a retrospective analysis involving patients who underwent percutaneous coronary intervention (PCI) or thrombolysis. STEMI patients were divided into the fQRS group (259 cases) and the non-fQRS group (161 cases)...
July 5, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
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