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The Evolution of Intraventricular Vortex during Ejection Studied by Using Vector Flow Mapping.
MedLine Citation:
PMID:  22985123     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Aims: The purpose of this study was to assess the evolution of intraventricular vortex during left ventricular (LV) ejection. Methods: Vector flow mapping was performed in 51 patients with coronary artery disease and LV ejection fraction (EF) >50%, 70 patients with EF <50% (13 with coronary artery disease and 57 with dilated cardiomyopathy), and 62 healthy volunteers. Results: In normals and patients with EF >50%, the intraventricular vortex dissipated quickly during early ejection. In patients with EF <50%, the vortex stayed mainly at apex and persisted for a significantly longer time. The evolution of vortex during ejection was significantly correlated with QRS width, EF, fractional shortening, LV outflow velocity time integral, wall motion score index (WMSI), LV dimensions, left atrial diameter, and diastolic mitral annular velocities. LV end-diastolic short diameter and WMSI were the independent determinants of the duration of vortex (R(2)  = 0.482, P < 0.001). End-systolic short diameter and apical WMSI were the independent determinants of duration of vortex corrected for ejection time (R(2)  = 0.565, P < 0.001). End-systolic short diameter was the independent determinant of percentage change in vortex area during early ejection (R(2)  = 0.355, P < 0.001). End-systolic short diameter and ejection time were the independent determinants of percentage change in vortex flow volume (R(2)  = 0.415, P < 0.001). Conclusions: In patients with LV systolic dysfunction, the vortex persists during ejection and stays mainly at apex. The vortex evolution during ejection is closely associated with LV dimensions and functions.
Authors:
Haibin Zhang; Liwen Liu; Lulu Chen; Na Ma; Liping Zhou; Ying Liu; Zhiguo Li; Chengguo Liu; Rui Hou; Suyang Zhu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-18
Journal Detail:
Title:  Echocardiography (Mount Kisco, N.Y.)     Volume:  -     ISSN:  1540-8175     ISO Abbreviation:  Echocardiography     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8511187     Medline TA:  Echocardiography     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012, Wiley Periodicals, Inc.
Affiliation:
Department of Ultrasound, PLA 210th Hospital, Dalian, China.
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