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https://www.readbyqxmd.com/read/29164019/quantitative-analysis-of-electro-anatomical-maps-application-to-an-experimental-model-of-left-bundle-branch-block-cardiac-resynchronization-therapy
#1
David Soto Iglesias, Nicolas Duchateau, Constantine Butakoff Kostantyn Butakov, David Andreu, Juan Fernandez-Armenta, Bart Bijnens, Antonio Berruezo, Marta Sitges, Oscar Camara
Electro-anatomical maps (EAMs) are commonly acquired in clinical routine for guiding ablation therapies. They provide voltage and activation time information on a 3-D anatomical mesh representation, making them useful for analyzing the electrical activation patterns in specific pathologies. However, the variability between the different acquisitions and anatomies hampers the comparison between different maps. This paper presents two contributions for the analysis of electrical patterns in EAM data from biventricular surfaces of cardiac chambers...
2017: IEEE Journal of Translational Engineering in Health and Medicine
https://www.readbyqxmd.com/read/29153215/-cardiac-resynchronisation
#2
Olivier Barthez
A fifth of patients with heart failure suffer from conduction disorders. A prolonged QRS duration on the electrocardiogram is an indicator of cardiac dyssynchrony. Several studies have shown the efficacy of cardiac resynchronisation therapy (CRT) in patients with a wide QRS duration: CRT is associated with reduced morbidity and mortality. An overview of the methods of implantation of CRT devices, the results of this electrical treatment and its limits.
November 2017: Soins; la Revue de Référence Infirmière
https://www.readbyqxmd.com/read/29150300/permanent-his-bundle-pacing-to-replace-biventricular-pacing-for-cardiac-resynchronization-therapy
#3
Benjamin J Scherlag, Alexa Papaila
INTRODUCTION: Cardiac resynchronization therapy (CRT) or biventricular pacing (BIVP) has become a common procedure for the treatment of ventricular dyssynchrony in patients with heart failure, particularly in those with bundle branch block patterns (QRS durations >150ms) on the electrocardiogram (ECG). However, a large group of non-responders are made up of patients with dyssynchrony and QRS duration below 130ms. Recent studies have introduced permanent His bundle pacing as another method for achieving normalization of the QRS duration even in a majority of patients with right or left bundle branch block pattern on the ECG...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29146543/cardiac-resynchronization-therapy-optimisation-of-interventricular-delay-by-the-systolic-dyssynchrony-index-a-comparative-randomized-12-month-follow-up-study
#4
Jiri Vondrak, Dan Marek, Jan Vecera, Klara Benesova, Jan Matejka
BACKGROUND: The aim of our study was to compare the effect of interventricular (VV) delay optimisation in CRT recipients based on systolic dyssynchrony index (SDI) derived from the three-dimensional echocardiography (3DE) versus QRS width assessment, on left ventricle volume reduction at the 12-month follow-up. METHODS: We included 63 patients with recently implanted CRT in this randomized, open-label trial. Patients were randomized to VV delay optimisation based on QRS complex width measurement in the group 1 (n=31) to obtain the narrowest QRS complex and based on SDI in group 2 (n=32) to achieve its lowest possible value...
November 13, 2017: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/29143244/correction-to-the-role-of-nuclear-medicine-in-assessments-of-cardiac-dyssynchrony
#5
Masanao Naya, Osamu Manabe, Kazuhiro Koyanagawa, Nagara Tamaki
Some of the values in Table 3 of the original publication inadvertently contained discrepancies with the literature from which they were taken. A corrected version of Table 3 can be found below; the values which have been corrected now appear in bold text (row: Romero-Farina G).
November 15, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29134245/esophageal-pressure-research-or-clinical-tool
#6
REVIEW
E Baedorf Kassis, S H Loring, D Talmor
Esophageal manometry has traditionally been utilized for respiratory physiology research, but clinicians have recently found numerous applications within the intensive care unit. Esophageal pressure (PEs) is a surrogate for pleural pressures (PPl), and the difference between airway pressure (PAO) and PEs provides a good estimate for the pressure across the lung also known as the transpulmonary pressure (PL). Differentiating the effects of mechanical ventilation and spontaneous breathing on the respiratory system, chest wall, and across the lung allows for improved personalization in clinical decision making...
November 13, 2017: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/29119374/review-of-cardiovascular-imaging-in-the-journal-of-nuclear-cardiology-2017-part-1-of-2-positron-emission-tomography-computed-tomography-and-magnetic-resonance
#7
Wael A AlJaroudi, Fadi G Hage
Several original articles and editorials have been published in the Journal of Nuclear Cardiology in 2017. It has become a tradition at the beginning of each year to summarize some of these key articles in 2 sister reviews. In this first part one, we will discuss some of the progress made in the field of heart failure (cardio-oncology, myocardial blood flow, viability, dyssynchrony, and risk stratification), inflammation, molecular and hybrid imaging using advancement in positron emission tomography, computed tomography, and magnetic resonance imaging...
November 8, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29118878/pathophysiology-and-current-evidence-for-detection-of-dyssynchrony
#8
EDITORIAL
Michael Spartalis, Eleni Tzatzaki, Eleftherios Spartalis, Christos Damaskos, Antonios Athanasiou, Efthimios Livanis, Vassilis Voudris
No abstract text is available yet for this article.
October 2017: Cardiology Research
https://www.readbyqxmd.com/read/29110290/relationship-between-left-ventricular-dyssynchrony-and-scar-burden-in-the-genesis-of-ventricular-tachyarrhythmia
#9
Saurabh Malhotra, Deepak K Pasupula, Ravi K Sharma, Samir Saba, Prem Soman
BACKGROUND: Left ventricular (LV) ejection fraction (EF) has poor predictive value for ventricular tachyarrhythmia (VT). Other parameters such as LV dyssynchrony (LVD), and LV scar burden have also been individually associated with VT, but the interplay of these factors in the genesis of VT has not been explored. This retrospective study sought to evaluate the relationship between LVD and imaging characteristics of the myocardial substrate in predicting VT. METHODS: We identified 183 patients (150 men; mean age: 64 ± 14 years and mean LVEF: 23% ± 7%), who received an implantable cardioverter defibrillator (ICD) for primary prevention and who underwent a gated single-photon emission computed tomography (GSPECT) myocardial perfusion scan prior to ICD implantation...
November 6, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29110289/dyssynchrony-a-risk-marker-for-ventricular-arrhythmias
#10
EDITORIAL
Vineet Kumar
No abstract text is available yet for this article.
November 6, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29107697/permanent-his-bundle-pacing-hbp-recommendations-from-a-multi-center-hbp-collaborative-working-group-for-standardization-of-definitions-implant-measurements-and-follow-up
#11
Pugazhendhi Vijayaraman, Gopi Dandamudi, Francesco Zanon, Parikshit S Sharma, Roderick Tung, Weijian Huang, Jayanthi Koneru, Hiroshi Tada, Kenneth A Ellenbogen, Daniel L Lustgarten
His bundle pacing (HBP) prevents ventricular dyssynchrony and its long-term consequences by preserving normal electrical activation of the ventricles. Since the original description of permanent HBP in 2000, the adoption of HBP has increased over the last several years. However the reporting of procedural and clinical outcomes to date is not uniform. This paper is a collaboration between several implanters with significant experience in HBP to establish a uniform set of definitions encompassing the different forms of HBP, as well as define a standardized approach to gathering data endpoints to ensure consistency in reported outcomes...
October 28, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29098524/mechanical-dyssynchrony-alters-left-ventricular-flow-energetics-in-failing-hearts-with-lbbb-a-4d-flow-cmr-pilot-study
#12
Jakub Zajac, Jonatan Eriksson, Urban Alehagen, Tino Ebbers, Ann F Bolger, Carl-Johan Carlhäll
The impact of left bundle branch block (LBBB) related mechanical dyssynchrony on left ventricular (LV) diastolic function remains unclear. 4D flow cardiovascular magnetic resonance (CMR) has provided reliable markers of LV dysfunction: reduced volume and kinetic energy (KE) of the portion of LV inflow which passes directly to outflow (Direct Flow) has been demonstrated in failing hearts compared to normal hearts. We sought to investigate the impact of mechanical dyssynchrony on diastolic function by comparing 4D flow in myopathic LVs with and without LBBB...
November 2, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29097067/contemporary-review-of-left-bundle-branch-block-in-the-failing-heart-pathogenesis-prognosis-and-therapy
#13
REVIEW
Juliana Kanawati, Raymond W Sy
Cardiac resynchronisation therapy (CRT) is a cornerstone in the contemporary management of heart failure. The most effective way of predicting response to this therapy remains electrocardiographic (ECG) criteria of electromechanical dyssynchrony. The left bundle branch block (LBBB) pattern is currently the most robust ECG criterion in predicting improvement in symptoms and reduction in mortality. However, recent studies using three-dimensional (3D) mapping and cardiac magnetic resonance imaging (CMR) have demonstrated heterogeneous left ventricular activation patterns in patients with LBBB...
October 6, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29067722/ventricular-dyssynchrony-as-a-marker-of-latent-carditis-in-children-with-acute-rheumatic-fever-a-tissue-doppler-imaging
#14
Ragab A Mahfouz, Waleed S Alawady, Abdelhakeem Salem
OBJECTIVE: We aimed to investigate the hypothesis that the presence of left ventricular (LV) dyssynchrony in children with acute rheumatic fever (ARF) children may be a predictor of latent rheumatic carditis. METHODS: Eighty-nine children with ARF and 45 healthy control children were included the study. LV dyssynchrony was investigated by color-coded tissue Doppler imaging. RESULTS: LV dyssynchrony parameters including Ts-SD-12, Ts-12, Ts-SD-6, and Ts-6 were found to be prolonged in children with ARF than in controls (P < ...
October 25, 2017: Echocardiography
https://www.readbyqxmd.com/read/29064041/does-cardiac-resynchronization-therapy-benefit-patients-with-non-left-bundle-branch-block-prolonged-qrs-patterns
#15
REVIEW
Mark N Belkin, Gaurav A Upadhyay
PURPOSE OF REVIEW: We sought to assess the utility of CRT in patients with non-LBBB. RECENT FINDINGS: CRT has an established role as a device-based therapy for patients with HF with systolic dysfunction and intraventricular conduction disease, specifically LBBB. In modern practice, the use of CRT in non-LBBB patients remains controversial, with high rates of non-response for CRT in patients with RBBB, in particular. Recent studies have identified sub-populations of non-LBBB patients that respond to resynchronization, such as those with prolonged PR intervals (≥ 230 ms), with RBBB and concomitant left-sided delay and those with significant burden of right ventricular pacing...
October 24, 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/29047378/comparison-of-strain-parameters-in-dyssynchronous-heart-failure-between-speckle-tracking-echocardiography-vendor-systems
#16
Wouter M van Everdingen, Alexander H Maass, Kevin Vernooy, Mathias Meine, Cornelis P Allaart, Frederik J De Lange, Arco J Teske, Bastiaan Geelhoed, Michiel Rienstra, Isabelle C Van Gelder, Marc A Vos, Maarten J Cramer
BACKGROUND: Although mechanical dyssynchrony parameters derived by speckle tracking echocardiography (STE) may predict response to cardiac resynchronization therapy (CRT), comparability of parameters derived with different STE vendors is unknown. METHODS: In the MARC study, echocardiographic images of heart failure patients obtained before CRT implantation were prospectively analysed with vendor specific STE software (GE EchoPac and Philips QLAB) and vendor-independent software (TomTec 2DCPA)...
October 18, 2017: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/29045290/the-prognostic-implications-of-two-dimensional-speckle-tracking-echocardiography-in-hypertrophic-cardiomyopathy-current-and-future-perspectives
#17
Thomas Zegkos, Despoina Parcharidou, Dimitrios Ntelios, Georgios Efthimiadis, Haralambos Karvounis
Two-dimensional (2D) speckle tracking echocardiography represents a novel, simple and reproducible technique for the estimation of left ventricular myocardial deformation (strain) and the evaluation of left ventricular twist mechanics. During the last few years, its clinical and prognostic implications in cardiomyopathies and hypertrophic cardiomyopathy (HCM) in particular have been rapidly increasing. Reduced global longitudinal strain is associated with more severe disease and confers an increased risk for major cardiac events, independently of other clinical and echocardiographic risk factors...
October 17, 2017: Cardiology in Review
https://www.readbyqxmd.com/read/29043465/comparison-of-strain-imaging-techniques-in-crt-candidates-cmr-tagging-cmr-feature-tracking-and-speckle-tracking-echocardiography
#18
Wouter M van Everdingen, Alwin Zweerink, Robin Nijveldt, Odette A E Salden, Mathias Meine, Alexander H Maass, Kevin Vernooy, Frederik J De Lange, Albert C van Rossum, Pierre Croisille, Patrick Clarysse, Bastiaan Geelhoed, Michiel Rienstra, Isabelle C Van Gelder, Marc A Vos, Cornelis P Allaart, Maarten J Cramer
Parameters using myocardial strain analysis may predict response to cardiac resynchronization therapy (CRT). As the agreement between currently available strain imaging modalities is unknown, three different modalities were compared. Twenty-seven CRT-candidates, prospectively included in the MARC study, underwent cardiac magnetic resonance (CMR) imaging and echocardiographic examination. Left ventricular (LV) circumferential strain was analysed with CMR tagging (CMR-TAG), CMR feature tracking (CMR-FT), and speckle tracking echocardiography (STE)...
October 17, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29019881/assessment-of-left-ventricular-performance-in-heart-transplant-recipients-by-three-dimensional-speckle-tracking-imaging
#19
Dan Wang, Li Zhang, Qingyu Zeng, Mingxing Xie
To calculate left ventricular (LV) global performance values in heart transplant (HT) recipients by three-dimensional speckle tracking imaging (3D-STI) and to observe the changes in LV global performance over time after HT and investigate the correlated factors.The 30 HT patients were divided into 2 groups according to postoperative time: 1 month postoperatively (HT-1) group and 6 months postoperatively (HT-2) group. Thirty healthy subjects were enrolled as control group. 3D-STI was performed to assess LV torsion, LV systolic dyssynchrony index (SDI), and LV global strain (GS)...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29016834/the-effect-of-ventricular-pre-excitation-on-ventricular-wall-motion-and-left-ventricular-systolic-function
#20
ChenCheng Dai, BaoJing Guo, WenXiu Li, YanYan Xiao, Mei Jin, Ling Han, JianZeng Dong
Aims: The relationship between ventricular pre-excitation and left ventricular dysfunction has been described in the absence of sustained supraventricular tachycardia in a series of case reports. There have been no systematic studies about the effect of ventricular pre-excitation with different accessory pathway locations on ventricular wall motion and left ventricular (LV) systolic function. Methods and results: Thirty patients were selected for each of 4 groups, including those with right septal pathways (Group 1), right free-wall pathways (Group 2), left free-wall pathways (Group 3), and non-pre-excited patients undergoing electrophysiological evaluation for supraventricular tachycardia...
August 9, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
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