Author + information
- Tomoko Umazume,
- Nobusada Funabashi,
- Koya Ozawa,
- Akihisa Kataoka,
- Masae Uehara,
- Hiroyuki Takaoka and
- Yoshio Kobayashi
We evaluated myocardial characteristics of sigmoid shaped interventricular septum (SSIVS) using regional peak longitudinal strain (RPLS) on speckle tracking transthoracic echocardiography (TTE) and 320 slice CT and examined relationship of SSIVS to ascending aortic (AA) sclerosis and its tilt to left ventricle (LV).
A total of 44 subjects (24 subjects (14 male, 72±10 yrs) with SSIVS diagnosed on TTE and 20 controls (17 male, 62±14 yrs) undergoing 320 slice CT and TTE were analyzed. SSIVS on TTE is defined as an angle between basal portion of IVS and AA of <120 degrees. On CT, % changes in AA lumen area during cardiac cycle were measured as an indicator of distensibility and AA sclerosis.
Age was significantly higher in SSIVS subjects. There were no significant differences in RPLS between SSIVS and controls, also no myocardial fibrosis on SSIVS on CT. % change in AA was significantly smaller in SSIVS subjects. There were no significant differences in Agaston calcium score of AA between groups. The angle between long axis of LV and AA on CT was significantly smaller in SSIVS subjects. Correlation coefficient of angles between IVS and AA and % change in AA (both on CT) in all subjects was 0.47. In logistic regression models for prediction of angle between IVS and AA <120 on CT, odds ratio of % change in AA and angle between LV and AA were 1.49 and 1.21, respectively (P<0.05).
SSIVS revealed normal myocardial characteristics and may have relationship with aging, AA sclerosis and its tilt to LV.
Poster Sessions, Expo North
Saturday, March 09, 2013, 3:45 p.m.-4:30 p.m.
Session Title: Imaging: CT/Multimodality IV
Abstract Category: 20. Imaging: CT/Multimodality
Presentation Number: 1182-355
- 2013 American College of Cardiology Foundation