scholarly journals Street Earnings Activation Delay

2018 ◽  
Author(s):  
Khrystyna Bochkay ◽  
Stanimir Markov ◽  
Musa Subasi ◽  
Eric H. Weisbrod
Keyword(s):  
Street Earnings ◽  
Activation Delay

Do Special Items Encourage 'Special Guidance' of Street Earnings?

2009 ◽  
Author(s):  
Theodore E. Christensen ◽  
Kenneth J. Merkley ◽  
Jenny Wu Tucker ◽  
Shankar Venkataraman
Keyword(s):  
Special Items ◽  
Street Earnings

Disclosure and Corporate Governance: The Case of Street Earnings*

2004 ◽  
Author(s):  
Richard M. Frankel ◽  
Sarah E. McVay ◽  
Mark T. Soliman
Keyword(s):  
Corporate Governance ◽  
Street Earnings

Mechanical-electrical interaction of the right ventricle in patients with repaired tetralogy of fallot: the next step towards resynchronization in congenital heart disease

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
J Rodriguez Garcia ◽  
A Pijuan Domenech ◽  
J Perez Rodon ◽  
B Benito Villabriga ◽  
J Francisco Pascual ◽  
...  
Keyword(s):  
Heart Disease ◽  
Ejection Fraction ◽  
Right Ventricle ◽  
Tetralogy Of Fallot ◽  
Negative Correlation ◽  
Electrical Activation ◽  
Basal Region ◽  
Repaired Tetralogy Of Fallot ◽  
The Right ◽  
Activation Delay

Abstract Introduction Patients with repaired tetralogy of Fallot (rTF) and severe pulmonary regurgitation frequently progress to dilation and dysfunction of the right ventricle (RV). It has been documented in the literature that there is a correlation between the duration of the QRS in the surface electrocardiogram and the hemodynamic parameters of the RV of these patients, suggesting the presence of a mechanical-electrical interaction. Purpose To determine if there is an association between the contraction delay in certain areas of the RV measured in M-mode echocardiography and the delay in electrical activation measured in the electroanatomic map (EAM) of RV in patients with rTF. Methods Unicentric and observational study of all patients with rTF undergoing EAM, echocardiography with study of RV asynchrony and cardiac magnetic resonance imaging (MRI). Activation delay in the antero-basal area and in the RV outflow tract (RVOT) in the EAM were both analysed (Figure 1A). The shortening delay in the same areas in M-mode echocardiography was also evaluated (Figure 1B, C). MRI data regarding volume and ejection fraction was also collected. Results 64 patients were included (36.7±10.6 years, 65% men). The mean total activation time of the RV (RV-TAT) was 127.3±42.4 ms. Activation mapping showed a recurrent pattern with beginning in the interventricular septum and ending in RV antero-basal region and/or RVOT. A linear positive correlation was observed between RV-TAT and the activation delay in both regions analysed (ρ=0.60 and ρ=0.52, respectively; p<0.001) and also between the electrical and mechanical delay in the anterior wall (ρ=0.41; p=0.001). On the other hand, it was observed a negative correlation between RV ejection fraction (RVEF), measured on MRI, and the RV-TAT (ρ=−0.41, p=0.002) and also between RVEF and the activation delay in the RV antero-basal region and in the RVOT (ρ=−0.32, p=0.016 and ρ=−0.36, p=0.007, respectively). Conclusions There is a mechanical-electrical interaction in the RV of patients with rTF, with a negative correlation between the activation delay and RVEF and between mechanical and electrical activation delay in specific anatomical regions (regional mechanical-electrical interaction). These results may guide future studies on resynchronization in this heart disease. Figure 1. EAM and echocardiographic measures Funding Acknowledgement Type of funding source: None

scholarly journals Simulated P wave morphology in the presence of endo-epicardial activation delay

EP Europace ◽  
2018 ◽  
Vol 20 (suppl_3) ◽  
pp. iii16-iii25 ◽  
Author(s):  
Éric Irakoze ◽  
Vincent Jacquemet
Keyword(s):  
P Wave ◽  
Wave Morphology ◽  
Activation Delay

Effects of single- and biventricular pacing on temporal and spatial dynamics of ventricular contraction

2002 ◽  
Vol 282 (1) ◽  
pp. H372-H379 ◽  
Author(s):  
Bradley T. Wyman ◽  
William C. Hunter ◽  
Frits W. Prinzen ◽  
Owen P. Faris ◽  
Elliot R. McVeigh
Keyword(s):  
Left Ventricle ◽  
Biventricular Pacing ◽  
Spatial Dynamics ◽  
Left Ventricular ◽  
Spatiotemporal Distribution ◽  
Right Atrial ◽  
Temporal Synchrony ◽  
Temporal And Spatial ◽  
Tagged Magnetic Resonance Imaging ◽  
Activation Delay

Resynchronization is frequently used for the treatment of heart failure, but the mechanism for improvement is not entirely clear. In the present study, the temporal synchrony and spatiotemporal distribution of left ventricular (LV) contraction was investigated in eight dogs during right atrial (RA), right ventricular apex (RVa), and biventricular (BiV) pacing using tagged magnetic resonance imaging. Mechanical activation (MA; the onset of circumferential shortening) was calculated from the images throughout the left ventricle for each pacing protocol. MA width (time for 20–90% of the left ventricle to contract) was significantly shorter during RA (43.6 ± 17.1 ms) than BiV and RVa pacing (67.4 ± 15.2 and 77.6 ± 16.4 ms, respectively). The activation delay vector (net delay in MA from one side of the left ventricle to the other) was significantly shorter during RA (18.9 ± 8.1 ms) and BiV (34.2 ± 18.3 ms) than during RVa (73.8 ± 16.3 ms) pacing. Rate of LV pressure increase was significantly lower during RVa than RA pacing (1,070 ± 370 vs. 1,560 ± 300 mmHg/s) with intermediate values for BiV pacing (1,310 ± 220 mmHg/s). BiV pacing has a greater impact on correcting the spatial distribution of LV contraction than on improving the temporal synchronization of contraction. Spatiotemporal distribution of contraction may be an important determinant of ventricular function.

scholarly journals 96-68: The QRS morphology influences the amount of LV activation delay mapped during coronary venous electroanatomic mapping in CRT implantation

EP Europace ◽  
2016 ◽  
Vol 18 (suppl_1) ◽  
pp. i78-i78
Author(s):  
Maurizio Del Greco ◽  
Anna Cima ◽  
Angheben Carlo ◽  
Massimiliano Maines ◽  
Domenico Catanzariti ◽  
...  
Keyword(s):  
Electroanatomic Mapping ◽  
Qrs Morphology ◽  
Activation Delay
Sign in / Sign up

Export Citation Format

Share Document