Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Dirar S, Khoury"'
Autor:
Jeff Siou, Mihir Naware, Riddhi Shah, Andreas Blomqvist, Dan E. Gutfinger, Dorin Panescu, Yelena Nabutovsky, Nils Holmström, Dirar S. Khoury
Publikováno v:
Scientia Iranica. 18:1500-1504
Introduction: For monitoring pulmonary edema secondary to Congestive Heart Failure (CHF), we investigated trends of impedance between implanted electrodes. Methods: ICDs were implanted in 16 dogs and 5 sheep. Right ventricles were paced (230–250 bp
Publikováno v:
IEEE Pulse. 2:56-64
The authors presented a first application of 2-D contrast-enhanced ICE in localizing RF ablation lesions and, more importantly, accurately and reproducibly quantifying their extent and depth within the myocardium in the intact beating heart. Furtherm
Autor:
Dirar S. Khoury, Karla M. Kurrelmeyer, Guillermo Torre-Amione, Jianwen Wang, Sherif F. Nagueh
Publikováno v:
Journal of the American Society of Echocardiography. 22:1040-1046
This study was performed in both animals and human subjects to test whether different approaches to calculate untwisting rate may lead to different results in the assessment of left ventricular (LV) relaxation.In animal experiments, congestive heart
Autor:
Mihir Naware, Jianwen Wang, Nilesh Mathuria, Dirar S. Khoury, Hue-Teh Shih, Jeff Siou, Sherif F. Nagueh, Andreas Blomqvist, Dorin Panescu
Publikováno v:
Journal of the American College of Cardiology. 53(12):1075-1081
ObjectivesThis study was designed to investigate the properties of multiple bioelectric impedance signals recorded during congestive heart failure (CHF) by utilizing various electrode configurations of an implanted cardiac resynchronization therapy s
Autor:
Yuesheng Ling, Harvey R. Chen, Liyun Rao, Jasvinder S. Sidhu, Miguel Valderrábano, Dirar S. Khoury
Publikováno v:
Circulation: Arrhythmia and Electrophysiology. 2:50-56
Background— The vein of Marshall (VOM) is an attractive target during ablation of atrial fibrillation because of its autonomic innervation, its location anterior to the left pulmonary veins, and its drainage in the coronary sinus. Methods and Resul
Autor:
Nilesh Mathuria, Dorin Panescu, Dirar S. Khoury, Sherif F. Nagueh, Hue-Teh Shih, Jianwen Wang
Publikováno v:
Journal of the American Society of Echocardiography. 22:95-98
Background Left ventricular (LV) twist dynamics play an important role in LV systolic and diastolic function. The aim of this preliminary study was to investigate LV twist dynamics in a canine model of reversible congestive heart failure (CHF). Metho
Autor:
Renjie He, Sherif F. Nagueh, April L. Gilbert, Jianwen Wang, Dirar S. Khoury, Yuesheng Ling, Liyun Rao, Nikolaos G. Frangogiannis
Publikováno v:
American Journal of Physiology-Heart and Circulatory Physiology. 294:H1002-H1009
Multiple imaging modalities are employed independent of one another while managing complex cardiac arrhythmias. To combine electrical, anatomical, and functional imaging in a single catheter system, we developed a balloon catheter that carried 64 ele
Autor:
Sherif F. Nagueh, William A. Zoghbi, Bahar Pirat, Daryl G. Schulz, Liyun Rao, Craig J. Hartley, Les Tiller, Dirar S. Khoury
Publikováno v:
Journal of the American College of Cardiology. 51:651-659
Objectives The aim of this study was to validate a novel, angle-independent, feature-tracking method for the echocardiographic quantitation of regional function. Background A new echocardiographic method, Velocity Vector Imaging (VVI) (syngo Velocity
Publikováno v:
Circulation. 116:2580-2586
Background— Recent studies validated the measurement of left ventricular (LV) untwisting rate (UR) by speckle tracking echocardiography. A few reports suggest that it may provide additional noninvasive insight into LV diastolic function. Methods an
Global Diastolic Strain Rate for the Assessment of Left Ventricular Relaxation and Filling Pressures
Publikováno v:
Circulation. 115:1376-1383
Background— Diastolic strain rate (SR) measurements that comprise all left ventricular (LV) segments are advantageous over myocardial velocity for assessment of diastolic function. Mitral early diastolic velocity (E)/SR ratio during the isovolumetr