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https://www.readbyqxmd.com/read/30497748/the-prognostic-value-of-fragmented-qrs-in-patients-undergoing-transcatheter-aortic-valve-implantation
#1
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
https://www.readbyqxmd.com/read/30497747/a-novel-signal-averaged-electrocardiogram-and-an-ambulatory-based-signal-averaged-electrocardiogram-show-strong-correlations-with-conventional-signal-averaged-electrocardiogram-in-healthy-subjects-a-validation-study
#2
Kenichi Hashimoto, Bonpei Takase, Masaaki Nagashima, Yuji Kasamaki, Hiroaki Shimabukuro, Masayoshi Soma, Tomohiro Nakayama
BACKGROUND: A novel signal-averaged electrocardiogram (SAECG) device and a novel ambulatory SAECG device are clinically available, but reference values have not been established. This study aimed to validate the novel SAECG and the novel ambulatory-based SAECG devices by comparison with the conventional SAECG device. METHODS AND RESULTS: High-resolution SAECGs were recorded consecutively in 83 healthy volunteers using the 3 devices. A novel ambulatory SAECG device was used as real-time recording within 15 min for validation study (15 min ambulatory-based SAECG)...
November 2018: Journal of Electrocardiology
https://www.readbyqxmd.com/read/30449990/association-between-fragmented-qrs-and-left-ventricular-systolic-function-in-patients-with-erectile-dysfunction
#3
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
https://www.readbyqxmd.com/read/30403441/electrocardiographic-predictors-of-myocardial-fibrosis-and-apical-hypertrophic-cardiomyopathy
#4
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
https://www.readbyqxmd.com/read/30371397/a-machine-learning-approach-for-detection-and-quantification-of-qrs-fragmentation
#5
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
https://www.readbyqxmd.com/read/30329201/baseline-fragmented-qrs-is-associated-with-increased-all-cause-mortality-in-heart-failure-with-reduced-ejection-fraction-a-systematic-review-and-meta-analysis
#6
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
https://www.readbyqxmd.com/read/30265438/combining-noninvasive-risk-stratification-parameters-improves-the-prediction-of-mortality-and-appropriate-icd-shocks
#7
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
https://www.readbyqxmd.com/read/30177339/fragmented-qrs-complex-in-patients-with-implantable-cardioverter-defibrillator-prevalence-and-predisposing-factors
#8
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
https://www.readbyqxmd.com/read/30177323/body-mass-index-is-a-predictor-of-presence-of-fragmented-qrs-complexes-on-electrocardiography-independent-of-underlying-cardiovascular-status
#9
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
https://www.readbyqxmd.com/read/30177321/the-relationship-between-fragmented-qrs-complexes-and-syntax-ii-scores-in-patients-with-st-segment-elevation-myocardial-infarction
#10
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
https://www.readbyqxmd.com/read/30117636/fragmented-qrs-as-a-predictor-of-in-hospital-life-threatening-arrhythmic-complications-in-st-elevation-myocardial-infarction-patients
#11
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
https://www.readbyqxmd.com/read/29996998/fragmented-qrs-complexes-after-acute-myocardial-infarction-are-independently-associated-with-unfavorable-left-ventricular-remodeling
#12
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
#13
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
#14
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...
October 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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
#15
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...
November 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
#16
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...
September 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29796231/linear-phase-sharp-transition-bpf-to-detect-noninvasive-maternal-and-fetal-heart-rate
#17
Niyan Marchon, Gourish Naik, K R Pai
Fetal heart rate (FHR) detection can be monitored using either direct fetal scalp electrode recording (invasive) or by indirect noninvasive technique. Weeks before delivery, the invasive method poses a risk factor to the fetus, while the latter provides accurate fetal ECG (FECG) information which can help diagnose fetal's well-being. Our technique employs variable order linear phase sharp transition (LPST) FIR band-pass filter which shows improved stopband attenuation at higher filter orders. The fetal frequency fiduciary edges form the band edges of the filter characterized by varying amounts of overlap of maternal ECG (MECG) spectrum...
2018: Journal of Healthcare Engineering
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
#18
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
#19
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
#20
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
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