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intrinsicoid Deflection

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https://www.readbyqxmd.com/read/30280303/idiopathic-ventricular-arrhythmias-arising-from-the-posterior-septum-of-tricuspid-and-mitral-annuli-comparison-of-electrocardiographic-characteristics-and-outcomes-of-catheter-ablation
#1
Eiji Sato, Tetsuo Yagi, Akihiko Ishida, Yoshiaki Mibiki, Yoshihiro Yamashina, Hirokazu Sato, Takashi Nakagawa, Kosuke Aoki, Keisuke Suzuki, Izutsu Takuma, Tomoyuki Yambe
PURPOSE: Ventricular arrhythmia (VA) arising from the tricuspid annulus in the posterior septum (PS) (TAPS-VA) has similar electrocardiographic characteristics as VA arising from the mitral annulus in the PS (MAPS-VA) because the two locations are adjacent. We examined the electrocardiographic characteristics that differentiate MAPS-VA from TAPS-VA and the efficacy of catheter ablation. METHODS: We studied 13 patients whose VAs were successfully ablated in the TAPS (n = 7) and MAPS (n = 6)...
October 2, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29484206/effect-of-coronary-slow-flow-on-intrinsicoid-deflection-of-qrs-complex
#2
Sabri Seyis
Coronary slow flow is a rare, clinically important entity observed in acute coronary syndrome. The pathophysiological mechanism is not fully elucidated. We investigated patients with chest pain who had angiographic features consistent with the coronary slow flow. One hundred ten patients were included. Electrocardiography, echocardiography, and angiography results were retrospectively noted. The mean age was 56.4. Fifty-eight were male, and fifty-two were female. The control group consisted of patients with normal angiography...
2018: Cardiology Research and Practice
https://www.readbyqxmd.com/read/29251398/relation-between-electrical-and-mechanical-dyssynchrony-in-patients-with-left-bundle-branch-block-an-electro-and-vectorcardiographic-study
#3
Jan De Pooter, Milad El Haddad, Victor Kamoen, Thomas Tibin Kallupurackal, Roland Stroobandt, Marc De Buyzere, Frank Timmermans
BACKGROUND: Current guidelines select patients for cardiac resynchronization therapy (CRT) mainly on electrocardiographic parameters like QRS duration and left bundle branch block (LBBB). However, among those LBBB patients, heterogeneity in mechanical dyssynchrony occurs and might be a reason for nonresponse to CRT. This study assesses the relation between electrocardiographic characteristics and presence of mechanical dyssynchrony among LBBB patients. METHODS: The study included patients with true LBBB (including mid-QRS notching) on standard 12-lead electrocardiograms...
July 2018: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28558750/approach-selection-of-radiofrequency-catheter-ablation-for-ventricular-arrhythmias-originating-from-the-left-ventricular-summit-potential-relevance-of-pseudo-delta-wave-intrinsicoid-deflection-time-maximal-deflection-index
#4
Cheng Zheng, Jin Li, Jia Li, De-Pu Zhou, Xiao-Wei Li, Shu-Jie Wu, Jia-Feng Lin
BACKGROUND: Ventricular arrhythmias (VAs) originating from the left ventricular summit is a challenge for radiofrequency catheter ablation (RFCA). The present study aimed to investigate the appropriate RFCA strategy for VAs originating from the left ventricular summit. METHODS: Forty-five consecutive patients with VAs arising from the left ventricular summit were successfully ablated at our cardiac electrophysiology center and reviewed in the study. RESULTS: Thirty-two cases of VAs were eliminated in the left ventricular endocardium by retrograde transaortic (n = 22, 22/45, 48...
May 30, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28546456/electrocardiographic-predictors-of-heart-failure-with-reduced-versus-preserved-ejection-fraction-the-multi-ethnic-study-of-atherosclerosis
#5
MULTICENTER STUDY
Wesley T O'Neal, Matylda Mazur, Alain G Bertoni, David A Bluemke, Mouaz H Al-Mallah, Joao A C Lima, Dalane Kitzman, Elsayed Z Soliman
BACKGROUND: Several markers detected on the routine 12-lead ECG are associated with future heart failure events. We examined whether these markers are able to separate the risk of heart failure with reduced ejection fraction (HFrEF) from heart failure with preserved ejection fraction (HFpEF). METHODS AND RESULTS: We analyzed data of 6664 participants (53% female; mean age 62±10 years) from MESA (Multi-Ethnic Study of Atherosclerosis) who were free of cardiovascular disease at baseline (2000-2002)...
May 25, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28431055/electrocardiographic-differentiation-of-idiopathic-right-ventricular-outflow-tract-ectopy-from-early-arrhythmogenic-right-ventricular-cardiomyopathy
#6
Jan Novak, Alessandro Zorzi, Silvia Castelletti, Antonis Pantasis, Ilaria Rigato, Domenico Corrado, William Mckenna, Pier D Lambiase
Aims: The differentiation between idiopathic right ventricular outflow tract (RVOT) arrhythmias and early arrhythmogenic right ventricular cardiomyopathy (ARVC) can be challenging. We aimed to assess whether QRS morphological features and coupling interval of ventricular ectopic beats (VEBs) can improve differentiation between the two conditions. Methods and Results: Twenty desmosomal-gene mutation carriers (13 females, mean age 43 years) with no or mild ARVC phenotypic expression and 33 age- and sex-matched subjects with idiopathic RVOT arrhythmias were studied...
April 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28146270/commentary-on-electrocardiographic-time-to-intrinsicoid-deflection-and-heart-failure-the-multi-ethnic-study-of-atherosclerosis
#7
COMMENT
E Harvey Estes
No abstract text is available yet for this article.
January 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28011802/novel-electrocardiographic-dyssynchrony-criteria-improve-patient-selection-for-cardiac-resynchronization-therapy
#8
András Vereckei, Zsuzsanna Szelényi, Valentina Kutyifa, Endre Zima, Gábor Szénási, Melinda Kiss, Gábor Katona, István Karádi, Béla Merkely
Aims: We hypothesized that the greater the intra- or interventricular dyssynchrony (intraD, interD), the more effective cardiac resynchronization therapy (CRT) is. We sought to improve patient selection for CRT by using novel ECG dyssynchrony criteria. Methods and results: Left ventricular (LV) intraD was estimated by the absolute time difference between the intrinsicoid deflections (ID) in leads aVL and aVF divided by the QRS duration (QRSd): [aVLID - aVFID]/QRSd (%)...
January 1, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27552258/electrocardiographic-time-to-intrinsicoid-deflection-and-heart-failure-the-multi-ethnic-study-of-atherosclerosis
#9
MULTICENTER STUDY
Wesley T O'Neal, Waqas T Qureshi, Saman Nazarian, Nadine Kawel-Boehm, David A Bluemke, Joao A C Lima, Elsayed Z Soliman
BACKGROUND: Time to intrinsicoid deflection (ID), the time from onset of the QRS complex to the peak of the R wave on the electrocardiogram, represents delayed ventricular activation and suggests that impaired myocardial function is present. It is unknown whether delayed time to ID is predictive of future heart failure (HF) events. HYPOTHESIS: Delayed time to ID is predictive of future HF events. METHODS: A total of 6394 participants (mean age, 62 ± 10 years; 54% women; 38% whites, 28% blacks, 22% Hispanics, 12% Chinese Americans) without clinically apparent cardiovascular disease or major ventricular conduction delay (QRS ≥120 ms) from the Multi-Ethnic Study of Atherosclerosis were included...
September 2016: Clinical Cardiology
https://www.readbyqxmd.com/read/27424074/ecg-parameters-predict-left-ventricular-conduction-delay-in-patients-with-left-ventricular-dysfunction
#10
Gianni Pastore, Massimiliano Maines, Lina Marcantoni, Francesco Zanon, Franco Noventa, Giorgio Corbucci, Enrico Baracca, Silvio Aggio, Claudio Picariello, Daniela Lanza, Gianluca Rigatelli, Mauro Carraro, Loris Roncon, S Serge Barold
BACKGROUND: Estimating left ventricular electrical delay (Q-LV) from a 12-lead ECG may be important in evaluating cardiac resynchronization therapy (CRT). OBJECTIVE: The purpose of this study was to assess the impact of Q-LV interval on ECG configuration. METHODS: One hundred ninety-two consecutive patients undergoing CRT implantation were divided electrocardiographically into 3 groups: left bundle branch block (LBBB), right bundle branch block (RBBB), and nonspecific intraventricular conduction delay (IVCD)...
December 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27338494/electrocardiographic-differentiation-of-idiopathic-right-ventricular-outflow-tract-ectopy-from-early-arrhythmogenic-right-ventricular-cardiomyopathy
#11
Jan Novak, Alessandro Zorzi, Silvia Castelletti, Antonis Pantasis, Ilaria Rigato, Domenico Corrado, William Mckenna, Pier D Lambiase
AIMS: The differentiation between idiopathic right ventricular outflow tract (RVOT) arrhythmias and early arrhythmogenic right ventricular cardiomyopathy (ARVC) can be challenging. We aimed to assess whether QRS morphological features and coupling interval of ventricular ectopic beats (VEBs) can improve differentiation between the two conditions. METHODS AND RESULTS: Twenty desmosomal-gene mutation carriers (13 females, mean age 43 years) with no or mild ARVC phenotypic expression and 33 age- and sex-matched subjects with idiopathic RVOT arrhythmias were studied...
June 23, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/26699237/delayed-intrinsicoid-deflection-of-the-qrs-complex-is-associated-with-sudden-cardiac-arrest
#12
MULTICENTER STUDY
Navid Darouian, Kumar Narayanan, Aapo L Aro, Kyndaron Reinier, Audrey Uy-Evanado, Carmen Teodorescu, Karen Gunson, Jonathan Jui, Sumeet S Chugh
BACKGROUND: Prolongation of initial ventricular depolarization on the 12-lead electrocardiogram (ECG), or delayed intrinsicoid deflection (DID), can indicate left ventricular hypertrophy (LVH). The possibility that this marker could convey distinct risk of sudden cardiac arrest (SCA) has not been evaluated. OBJECTIVE: To evaluate the association of DID and SCA in the community. METHODS: In the ongoing prospective, population-based Oregon Sudden Unexpected Death Study (Oregon SUDS; catchment area approximately 1 million), SCA cases were compared to geographic controls with no SCA...
April 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/26523751/r-peak-time-an-electrocardiographic-parameter-with-multiple-clinical-applications
#13
REVIEW
Andrés Ricardo Pérez-Riera, Luiz Carlos de Abreu, Raimundo Barbosa-Barros, Kjell C Nikus, Adrian Baranchuk
In the 12-lead electrocardiogram (ECG), the time from the onset of the QRS complex (Q or R wave) to the apex or peak of R or to R' (when present), using indirect or semidirect surface unipolar precordial leads, bipolar limb leads or unipolar limb leads, is called ventricular activation time (VAT), R wave peak time (RWPT), R-peak time or intrinsicoid deflection (ID). The R-peak time in a specific ECG lead is the interval from the earliest onset of the QRS complex, preferably determined from multiple simultaneously recorded leads, to the peak (maximum) of the R wave or R' if present...
January 2016: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/26093870/the-romhilt-estes-left-ventricular-hypertrophy-score-and-its-components-predict-all-cause-mortality-in-the-general-population
#14
E Harvey Estes, Zhu-Ming Zhang, Yabing Li, Larisa G Tereschenko, Elsayed Z Soliman
BACKGROUND: The same electrocardiographic (ECG) criteria that have been used for detection of left ventricular hypertrophy (LVH) have recently been recognized as predictors of adverse clinical outcomes, but this predictive ability is inadequately explored and understood. METHODS: A total of 14,984 participants from the ARIC study were included in this analysis. Romhilt-Estes (R-E) LVH score was measured from the automatically processed baseline (1987-1989) ECG data...
July 2015: American Heart Journal
https://www.readbyqxmd.com/read/26025201/an-in-silico-analysis-of-the-effect-of-heart-position-and-orientation-on-the-ecg-morphology-and-vectorcardiogram-parameters-in-patients-with-heart-failure-and-intraventricular-conduction-defects
#15
COMPARATIVE STUDY
Uyên Châu Nguyên, Mark Potse, François Regoli, Maria Luce Caputo, Giulio Conte, Romina Murzilli, Stefano Muzzarelli, Tiziano Moccetti, Enrico G Caiani, Frits W Prinzen, Rolf Krause, Angelo Auricchio
AIM: The aim of this study was to investigate the influence of geometrical factors on the ECG morphology and vectorcardiogram (VCG) parameters. METHODS: Patient-tailored models based on five heart-failure patients with intraventricular conduction defects (IVCDs) were created. The heart was shifted up to 6 cm to the left, right, up, and down and rotated ±30° around the anteroposterior axis. Precordial electrodes were shifted 3 cm down. RESULTS: Geometry modifications strongly altered ECG notching/slurring and intrinsicoid deflection time...
July 2015: Journal of Electrocardiology
https://www.readbyqxmd.com/read/25968915/electrocardiographic-parameters-predict-super-response-in-cardiac-resynchronization-therapy
#16
Marta Cvijić, David Žižek, Bor Antolič, Igor Zupan
BACKGROUND: Cardiac resynchronization therapy (CRT) is an established treatment for heart failure patients. However, determinants of response to CRT remain elusive. The aim of the study was to assess the value of ECG parameters to predict super-response in CRT patients. METHODS: A 12-lead surface ECG was recorded at baseline and immediately after CRT-device implantation. Baseline ECG parameters (QRS duration, bundle branch morphology, axis, PR interval, QTc, intrinsicoid deflection) and post-implant paced QRS duration were analyzed; relative change in QRS duration was calculated...
July 2015: Journal of Electrocardiology
https://www.readbyqxmd.com/read/24883077/statistical-evaluation-of-reproducibility-of-automated-ecg-measurements-an-example-from-arrhythmogenic-right-ventricular-dysplasia-cardiomyopathy-clinic
#17
Timothy Huang, Cynthia A James, Crystal Tichnell, Brittney Murray, Joel Xue, Hugh Calkins, Larisa G Tereshchenko
BACKGROUND: Arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is characterized by delay in depolarization of the right ventricle, detected by prolonged terminal activation duration (TAD) in V1-V3. However, manual ECG measurements have shown moderate-to-low intra- and inter-reader agreement. The goal of this study was to assess reproducibility of automated ECG measurements in the right precordial leads. METHODS: Pairs of ECGs recorded in the same day from Johns Hopkins ARVD/C Registry participants [n=247, mean age 35...
September 1, 2014: Biomedical Signal Processing and Control
https://www.readbyqxmd.com/read/24827797/how-to-recognize-epicardial-origin-of-ventricular-tachycardias
#18
REVIEW
Juan Fernandez-Armenta, Antonio Berruezo
Percutaneous pericardial access for epicardial mapping and ablation of ventricular arrhythmias has expanded considerably in recent years. After its description in patients with Chagas disease, the technique has provided relevant information on the arrhythmia substrate in other cardiomyopathies and has improved the results of ablation procedures in various clinical settings. Electrocardiographic criteria proposed for the recognition of the epicardial origin of ventricular tachycardias are mainly based on analysis of the first QRS components...
August 2014: Current Cardiology Reviews
https://www.readbyqxmd.com/read/24636795/electrocardiographic-characteristics-of-premature-ventricular-contractions-in-subjects-with-type-1-pattern-of-brugada-syndrome
#19
Konstantinos P Letsas, Dimitrios Asvestas, Konstantinos Vlachos, Dimitrios Karlis, Panagiotis Korantzopoulos, Michael Efremidis, Antonios Sideris
BACKGROUND: The ECG characteristics of premature ventricular contractions (PVCs) in subjects with Brugada syndrome (BrS) phenotype were investigated. METHODS AND RESULTS: A total of 96 patients with type 1 ECG pattern of BrS were screened for PVCs. The study population consisted of 10 male individuals (mean age 41.9±5.6 years) with spontaneous (n=2) or drug-induced (n=8) type 1 ECG phenotype of BrS and PVCs. Twenty patients (11 males, age 44.6±15.1 years) with idiopathic right ventricular outflow tract (RVOT) PVCs (LBBB/inferior axis morphology with a negative QRS complex in lead aVL) successfully ablated from an endocardial site were also included in the study, and served as comparative controls...
May 2014: Journal of Electrocardiology
https://www.readbyqxmd.com/read/24312241/catheter-ablation-of-idiopathic-premature-ventricular-contractions-and-ventricular-tachycardias-originating-from-the-vicinity-of-endocardial-and-epicardial-mitral-annulus
#20
Li Yue-Chun, Zheng Cheng, Hong Jun, Cheng Jun-Hua, Zhao Jing-Lin, Lin Jia-Feng
BACKGROUND: Several previous reports have revealed that idiopathic ventricular arrhythmias (VAs), including premature ventricular contractions (PVCs) and ventricular tachycardias (IVTs), can originate from endocardial mitral annulus (ENDO MA). However, these data are limited to ENDO MA VAs, and little is known about the electrocardiographic (ECG) characteristics and the efficacy of radiofrequency catheter ablation (RFCA) via the coronary venous system for the VAs arising from the epicardial MA (EPI MA)...
2013: PloS One
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