Abstract
Tissue synchronization imaging (TSI), a parametric imaging technique based on tissue velocity imaging, often demonstrates patterns other than lateral delay in patients evaluated for cardiac resynchronization therapy (CRT). The prevalence of these patterns and their response to CRT has not been well described. We hypothesized that regional patterns of dyssynchrony might correlate with the extent of reverse remodeling. A consecutive series of 32 patients underwent echocardiographic study prior to CRT implant and 3 months postimplant. TSI was used to color-code the time-to-peak positive systolic velocity at six basal and six mid-LV segments. Each patient was assigned to one of four groups based on the predominant location of greatest delay (≥ 2 segments): (1) posterolateral delay, (2) septal delay, (3) no dyssynchrony, or (4) other. Patients were classified as follows: posterolateral delay in 44% of patients (n = 14), septal delay in 28% (n = 9), no dyssynchrony in 16% (n = 5), and other pattern in 13% (n = 4). At 3-month follow-up, the group with the lateral delay pattern was associated with the greatest decrease in left ventricular end-systolic volume (LVESV) and the largest improvement in left ventricular ejection fraction (LVE...Continue Reading
References
Jun 15, 1999·Circulation·A AuricchioJ Spinelli
Jan 30, 2002·Circulation·Cheuk-Man YuChu-Pak Lau
Jun 14, 2002·The New England Journal of Medicine·William T AbrahamUNKNOWN MIRACLE Study Group. Multicenter InSync Randomized Clinical Evaluation
Aug 9, 2003·Journal of the American College of Cardiology·Ole A BreithardtGeorge R Sutherland
Apr 28, 2004·The American Journal of Cardiology·John GorcsanDavid Schwartzman
May 20, 2004·Journal of Cardiovascular Electrophysiology·Gabe B BleekerJeroen J Bax
May 21, 2004·The New England Journal of Medicine·Michael R BristowUNKNOWN Comparison of Medical Therapy, Pacing, and Defibrillation in Heart Failure (COMPANION) Investigators
Jan 5, 2005·Journal of the American College of Cardiology·Maria Vittoria PitzalisPaolo Rizzon
Mar 9, 2005·The New England Journal of Medicine·John G F ClelandUNKNOWN Cardiac Resynchronization-Heart Failure (CARE-HF) Study Investigators
May 25, 2005·Circulation·Robert H HelmDavid A Kass
Sep 8, 2005·Circulation·Cheuk-Man YuJeroen J Bax
Dec 20, 2005·Journal of the American College of Cardiology·Jeroen J BaxCheuk-Man Yu
Jul 27, 2006·Progress in Cardiovascular Diseases·David D Spragg, David A Kass
Mar 28, 2007·Heart Failure Clinics·Theodore P AbrahamDavid A Kass
Sep 20, 2007·Current Cardiology Reports·Kenneth C BilchickDavid A Kass
Oct 9, 2007·Journal of the American College of Cardiology·John GorcsanJeroen J Bax
Oct 9, 2007·Journal of the American College of Cardiology·Melissa J ByrneAlbert C Lardo
Jan 5, 2008·Journal of the American College of Cardiology·David A Kass
May 7, 2008·Circulation·Eugene S ChungJaime Murillo
Nov 5, 2008·Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology·John Gorcsan, Matthew S Suffoletto
Citations
Jan 12, 2013·Echocardiography·Mehmet Fatih KarakaşNihat Sen
Oct 22, 2013·Echocardiography·Kazuhiro TatsumiKen-ichi Hirata
Sep 25, 2014·Echocardiography·Gani Bajraktari, Michael Y Henein