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QRS Fragment

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https://www.readbyqxmd.com/read/30066622/fragmented-qrs-on-12-lead-electrocardiogram-is-correlated-with-severe-coronary-artery-disease-and-abnormal-myocardial-perfusion-scintigraphy-results-in-renal-transplant-candidates
#1
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
https://www.readbyqxmd.com/read/30009377/fragmented-endocardial-signals-and-early-afterdepolarizations-during-torsades-de-pointes-tachycardia
#2
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
https://www.readbyqxmd.com/read/29996998/fragmented-qrs-complexes-after-acute-myocardial-infarction-are-independently-associated-with-unfavorable-left-ventricular-remodeling
#3
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
https://www.readbyqxmd.com/read/29974889/fragmented-qrs-fqrs-complex-predicts-adverse-cardiac-events-of-st-segment-elevation-myocardial-infarction-patients-undergoing-percutaneous-coronary-intervention-and-thrombolysis
#4
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
https://www.readbyqxmd.com/read/29953954/progression-of-electrocardiographic-abnormalities-associated-with-initial-ventricular-fibrillation-in-asymptomatic-patients-with-brugada-syndrome
#5
Hiroshi Morita, Masakazu Miyamoto, Atsuyuki Watanabe, Saori Tsukuda, Yoshimasa Morimoto, Satoshi Kawada, Koji Nakagawa, Nobuhiro Nishii, Hiroshi Ito
BACKGROUND: Various risk stratifications in asymptomatic patients with Brugada syndrome (BrS) have been proposed, but the electrophysiological change that promotes ventricular fibrillation (VF) is still unknown. OBJECTIVE: The aim of this study was to clarify the changes in electrocardiographic (ECG) markers at the onset of VF from ECGs recorded when patients were still asymptomatic. METHODS: The subjects of this study included 14 patients with VF and 48 consecutive asymptomatic patients with BrS...
June 25, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29953624/coexistence-of-atrioventricular-accessory-pathways-and-drug-induced-type-1-brugada-pattern
#6
Can Hasdemir, Jimmy Jyh-Ming Juang, Sedat Kose, Umut Kocabas, Mehmet N Orman, Serdar Payzin, Hatice Sahin, Candan Celen, Emin E Ozcan, Ching-Yu Julius Chen, Ramazan Gunduz, Oguzhan E Turan, Oktay Senol, Elena Burashnikov, Charles Antzelevitch
BACKGROUND: Atrial arrhythmias, particularly atrioventricular nodal reentrant tachycardia, can coexist with drug-induced type 1 Brugada electrocardiogram (ECG) pattern (DI-Type1-BrP). The present study was designed to determine the prevalence of DI-Type1-BrP in patients with atrioventricular accessory pathways (AV-APs) and to investigate the clinical, electrocardiographic, electrophysiologic, and genetic characteristics of these patients. METHODS: One-hundred twenty-four consecutive cases of AV-APs and 84 controls underwent an ajmaline challenge test to unmask DI-Type1-BrP...
June 28, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29951142/effect-of-heart-rate-and-pacing-mode-on-qrs-fragmentation
#7
Fani Zagkli, Stefanos Despotopoulos, Christos Spiliotopoulos, John Chiladakis
Background: The study was designed to investigate the effect of heart rate and pacing mode on QRS fragmentation (f-QRS). Moreover, the usefulness of f-QRS in distinguishing patients with impaired left ventricular ejection function (EF) and ventricular tachycardia (VT) from patients with normal EF was assessed. Methods: Three hundred and six recipients, with dual-chamber device, with intrinsic narrow or wide QRS complex and preserved atrioventricular conduction were grouped into normal-EF or impaired-EF VT...
June 2018: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29932268/fragmented-qrs-and-mortality-in-patients-undergoing-percutaneous-intervention-for-st-elevation-myocardial-infarction-systematic-review-and-meta-analysis
#8
Napatt Kanjanahattakij, Pattara Rattanawong, Tanawan Riangwiwat, Narut Prasitlumkum, Nath Limpruttidham, Pakawat Chongsathidkiet, Wasawat Vutthikraivit, Erin Crossey
BACKGROUND: Fragmented QRS reflects disturbances in the myocardium predisposing the heart to ventricular tachyarrhythmias. Recent studies suggest that fragmented QRS (fQRS) is associated with mortality in ST-elevation myocardial infarction (STEMI) patients who underwent percutaneous coronary intervention (PCI). However, a systematic review and meta-analysis of the literature has not been done. We assessed the association between fQRS and overall mortality in STEMI patients who subsequently underwent PCI by a systematic review and meta-analysis...
June 22, 2018: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/29858880/fragmentation-of-qrs-complex-during-ventricular-pacing-is-associated-with-ventricular-arrhythmic-events-in-patients-with-left-ventricular-dysfunction
#9
Freddy Del-Carpio Munoz, Peter A Noseworthy, S Michael Gharacholou, Christopher G Scott, Vuyisile T Nkomo, Francisco Lopez-Jimenez, Yong-Mei Cha, Thomas M Munger, Paul A Friedman, Samuel J Asirvatham
BACKGROUND: QRS fragmentation (fQRS) during baseline ventricular conduction, a myocardial fibrosis marker, is associated with increased risk of ventricular tachyarrhythmias but may not manifest unless ventricular activation change is provoked. We examined the association of fQRS during right ventricular (RV) pacing with death and ventricular tachyarrhythmia in patients with left ventricular (LV) dysfunction undergoing electrophysiology study (EPS). METHODS AND RESULTS: Study participants had LV dysfunction (ejection fraction < 50%) undergoing EPS from January 2002 to May 2014 at Mayo Clinic in Rochester, Minnesota...
June 2, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29776809/the-presence-of-fragmented-qrs-is-associated-with-increased-epicardial-adipose-tissue-and-subclinical-myocardial-dysfunction-in-healthy-individuals
#10
Mehmet Yaman, Ugur Arslan, Adil Bayramoglu, Osman Bektas, Zeki Yuksel Gunaydin, Ahmet Kaya
AIM: The aim of this study was to measure epicardial adipose tissue (EAT) and to assess left ventricular (LV) systolic and diastolic function in a healthy population grouped according to the presence of fragmented QRS (fQRS). METHODS: In this prospective case-control study, the study population consisted of 308 healthy individuals who were divided into two groups according to the existence of fQRS: 180 fQRS(+) individuals (with fQRS), and 128 age- and gender-matched fQRS(-) individuals (without fQRS)...
June 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29759533/12-lead-electrocardiogram-to-localize-region-of-abnormal-electroanatomic-substrate-in-arrhythmogenic-right-ventricular-cardiomyopathy
#11
Cory M Tschabrunn, Haris M Haqqani, Pasquale Santangeli, Erica S Zado, Francis E Marchlinski
OBJECTIVES: The purpose of this study was to evaluate the relationship between electrocardiogram (ECG) QRS fragmentation (fQRS) and right ventricular (RV) endocardial (ENDO) and epicardial (EPI) electroanatomic substrate abnormalities in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC). BACKGROUND: fQRS is frequently observed in patients with ARVC and reflects delayed conduction due to RV fibrosis. METHODS: A total of 30 consecutive patients met the task force criteria for ARVC (19 men, mean age 41...
July 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29732745/combining-fragmented-qrs-and-timi-score-for-predicting-in-hospital-short-term-prognosis-after-acute-myocardial-infarction
#12
Qin-Hui Sheng, Chih Chi Hsu, Jian-Ping Li, Tao Hong, Yong Huo
Acute myocardial infarction (AMI) has a high mortality rate and poor prognosis for patients. The primary causes of death are arrhythmia and heart failure. For patients admitted because of myocardial infarction, various risk evaluations are initiated to foresee possible complications. The thrombolysis in myocardial infarction (TIMI) risk score, which can be used to predict the prognosis and the need for revascularisation, is the most convenient and commonly used system, but is inadequate for AMI patients on admittance...
May 2018: Journal of Zhejiang University. Science. B
https://www.readbyqxmd.com/read/29728953/electrocardiography-based-prediction-of-hypertrophy-pattern-and-fibrosis-amount-in-hypertrophic-cardiomyopathy-comparative-study-with-cardiac-magnetic-resonance-imaging
#13
Chul Hwan Park, Hyemoon Chung, Yoonjung Kim, Jong-Youn Kim, Pil-Ki Min, Kyung-A Lee, Young Won Yoon, Tae Hoon Kim, Byoung Kwon Lee, Bum-Kee Hong, Se-Joong Rim, Hyuck Moon Kwon, Eui-Young Choi
Although, cardiac magnetic resonance imaging (CMR) is a gold standard for risk stratification of hypertrophic cardiomyopathy (HCM), is limited in some situations. We sought to evaluate the predictive power of quantitative electrocardiography in assessing hypertrophy pattern and fibrosis in HCM. Eighty-eight patients with HCM were studied. Voltage of R-S-T waves, number of fragmented QRS (fQRS) complexes, and T wave morphology were measured by 12-lead electrocardiography. Sixteen segmental thickness, late gadolinium enhancement (LGE), native T1, extracellular volume fraction (ECV), and T2, left ventricular (LV) mass and %LGE were measured by CMR...
May 4, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29709101/genotype-phenotype-relationship-and-risk-stratification-in-loss-of-function-scn5a-mutation-carriers
#14
Tomas Robyns, Dieter Nuyens, Bert Vandenberk, Cuno Kuiperi, Anniek Corveleyn, Jeroen Breckpot, Christophe Garweg, Joris Ector, Rik Willems
INTRODUCTION: Loss-of-function (LoF) mutations in the SCN5A gene cause multiple phenotypes including Brugada Syndrome (BrS) and a diffuse cardiac conduction defect. Markers of increased risk for sudden cardiac death (SCD) in LoF SCN5A mutation carriers are ill defined. We hypothesized that late potentials and fragmented QRS would be more prevalent in SCN5A mutation carriers compared to SCN5A-negative BrS patients and evaluated risk markers for SCD in SCN5A mutation carriers. METHODS: We included all SCN5A loss-of-function mutation carriers and SCN5A-negative BrS patients from our center...
April 30, 2018: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/29694354/clinical-significance-of-fragmented-qrs-complexes-or-j-waves-in-patients-with-idiopathic-ventricular-arrhythmias
#15
Choong Sil Seong, Hye Bin Gwag, Jin Kyung Hwang, Seung Jung Park, Kyoung-Min Park, June Soo Kim, Young Keun On
BACKGROUND: Idiopathic ventricular fibrillation (IVF) can cause sudden cardiac death. Previous studies have reported that J waves and fragmented QRS complexes (f-QRS) are arrhythmogenic markers and predictors of cardiac events. We evaluated the prevalence and clinical significance of J waves and f-QRS in patients with IVF. METHODS: We studied 81 patients who received an implantable cardioverter defibrillator (ICD) due to IVF between October 1999 and June 2015. We assessed the prevalence of J waves and f-QRS using electrocardiograms (ECGs)...
2018: PloS One
https://www.readbyqxmd.com/read/29676061/use-of-fragmented-qrs-in-prognosticating-clinical-deterioration-and-mortality-in-pulmonary-embolism-a-meta-analysis
#16
REVIEW
Amro Qaddoura, Geneviève C Digby, Conrad Kabali, Piotr Kukla, Gary Tse, Benedict Glover, Adrian M Baranchuk
BACKGROUND: Fragmented QRS (fQRS) on electrocardiography is potentially valuable in prognosticating acute pulmonary embolism (PE). ECG is one of the first tests performed in the emergency department, quickly interpretable, noninvasive, inexpensive, and available in remote areas. We aimed to review fQRS's role in PE prognostication. METHODS: We searched MEDLINE, EMBASE, Google Scholar, Web of Science, abstracts, conference proceedings, and reference lists until October 2017...
April 19, 2018: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/29622965/the-relation-between-coronary-artery-disease-severity-and-fragmented-qrs-complex-in-patients-with-left-bundle-branch-block
#17
Mohamed M Al-Daydamony, Tamer M Mustafa
Background: The diagnosis of coronary artery disease (CAD) in patients with LBBB represents a clinical challenge. The presence of fragmented QRS (fQRS) complex on surface ECG may be related to myocardial ischemia, scarring or fibrosis. Objectives: To investigate the relation between fQRS and the presence and severity of CAD in patients with LBBB. Patients and methods: 56 patients with symptoms suggesting CAD and complete LBBB were submitted to full history taking and clinical examination, complete 12-leads electrocardiography (ECG) to confirm the diagnosis of LBBB and to diagnose the fragmented wide QRS (f-wQRS) complex, echocardiography, and coronary angiography; lesions with ⩾70% narrowing in major epicardial artery or ⩾50% narrowing in the left main coronary artery were considered significant; and Gensini score was calculated...
June 2017: The Egyptian heart journal: (EHJ): official bulletin of the Egyptian Society of Cardiology
https://www.readbyqxmd.com/read/29603270/value-of-a-novel-16-lead-high-definition-ecg-machine-to-detect-conduction-abnormalities-in-structural-heart-disease
#18
Guo-Liang Li, Ardan M Saguner, Deniz Akdis, Guy Hugues Fontaine
BACKGROUND: Depolarization abnormalities are hardly detectable by standard 12-lead electrocardiogram (ECG) in some patients. OBJECTIVE: To evaluate the value of the 16-lead High-Definition (HD)-ECG machine to record conduction abnormalities including Epsilon waves in patients with structural heart disease. METHODS: Tracings with 12-lead ECG, 16-lead HD-ECG, and signal-averaged ECG were studied. RESULTS: (1) Case of severe coronary artery disease (CAD): On 16-lead HD-ECG, a tiny intra-QRS signal was noted in lead III, a prolonged P wave in lead II, and fragmentation on top of lead aVL and lead aVF...
June 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29512627/evaluation-of-the-association-between-serum-uric-acid-level-andthe-predicted-risk-score-of-sudden-cardiac-death-in-five-years-in-patients-with-hypertrophic-cardiomyopathy
#19
Sinem Özyılmaz, Muhammet Hulusi Satılmışoğlu, Mehmet Gül, Hüseyin Uyarel, Osman Akin Serdar
OBJECTIVE: The aim of this study was to determine the relationship between serum uric acid (UA) level and the predicted risk score for sudden cardiac death in 5 years (the HCM Risk-SCD), galectin-3 level, and positive fragmented QRS (fQRS) on electrocardiography (ECG) in patients with hypertrophic cardiomyopathy (HCM). METHODS: This was a prospective, observational study. In all, 115 consecutive patients (age >17 years) with HCM and 80 healthy participants were included in the study...
March 2018: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/29439530/analysis-of-the-high-frequency-content-in-human-qrs-complexes-by-the-continuous-wavelet-transform-an-automatized-analysis-for-the-prediction-of-sudden-cardiac-death
#20
Daniel García Iglesias, Nieves Roqueñi Gutiérrez, Francisco Javier De Cos, David Calvo
BACKGROUND: Fragmentation and delayed potentials in the QRS signal of patients have been postulated as risk markers for Sudden Cardiac Death (SCD). The analysis of the high-frequency spectral content may be useful for quantification. METHODS: Forty-two consecutive patients with prior history of SCD or malignant arrhythmias (patients) where compared with 120 healthy individuals (controls). The QRS complexes were extracted with a modified Pan-Tompkins algorithm and processed with the Continuous Wavelet Transform to analyze the high-frequency content (85-130 Hz)...
February 12, 2018: Sensors
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