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Ultrasound in Medicine and Biology
Volume 32, Number 5S, 2006
apex rotated counterclockwise as viewed from the apex whereas the base rotated clockwise. LV segmental rotation degrees and LV segmental and global torsion were not significantly changed after hemodialysis. Conclusions: LV torsion is not influenced by preload change and can be used as a parameter of cardiac performance without load dependency.
Conclusions: The present study showed decreased longitudinal systolic velocity at mitral annulus and systolic myocardial velocity gradient in patients with type II diabetes mellitus with preserved global systolic function when compared with the healthy subjects, indicating that the subendocardial myocardial systolic function is impaired in diabetes mellitus patients.
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Objective assessment of right ventricular systolic function with midventricular systolic strain in patients with acute pulmonary thromboembolism Park J-H, Park SJ, Lee MS, Park YS, Lee J-H, Choi S-W, Jeong J-O, Seong IW, Chungnam National University, Korea
Evaluation on left ventricular segmental myocardial longitudinal strain and displacement by speckle tracking imaging Uo MQ, Sichuan Provincial Hospital, China
Objectives: The presence of right ventricular (RV) dysfunction is associated with poor prognosis in patients with acute pulmonary thromboembolism (PTE). We aimed to evaluate RV function objectively with strain analysis. Methods: From March 2005 to October 2005, total 16 consecutive patients (8 males, mean 64 ⫾ 19 years; range 22 to 84) with acute PTE were included. Echocardiographic data including RV Tei index and RV strain were assessed by Vivid 7 (GE Medical Systems, Waukesha, Wisconsin). Results: Mean RVEF was 25.0 ⫾ 13.0%, fractional area change of RV (FACRV) was 19.4 ⫾ 12.7% and RV Tei index was 0.96 ⫾ 0.30 and TR Vmax was 4.2 ⫾ 0.6m/s at baseline. Systolic strain of midventricle was decreased (RV base: ⫺22.1 ⫾ 7.6%, midventricle: 0.2 ⫾ 18.8%, apex: ⫺12.8 ⫾ 8.9%). Follow-up data were obtained in 13 patients after successful treatment. Mean RVEF and FACRV was increased to 49.5 ⫾ 10.7% and 37.4 ⫾ 8.0% (p ⬍ 0.001, respectively) and RV Tei index to 0.48 ⫾ 0.16 (p ⫽ 0.006). Also, RV strain was increased significantly, especially in midventricle(base: ⫺24.0 ⫾ 9.6%, p ⫽ 0.373, midventricle: ⫺24.9 ⫾ 8.0%, p ⬍ 0.001, apex: ⫺13.2 ⫾ 14.0%, p ⫽ 0.917). RVEF and FACRV were negatively correlated with midventricular systolic strain (r ⫽ ⫺0.705 and r ⫽ ⫺0.621, p ⬍ 0.001, respectively) and RV Tei index (r ⫽ ⫺0.421 and r ⫽ ⫺0.504, p ⫽ 0.023 and p ⫽ 0.009, respectively). Conclusions: Midventricular systolic strain and RV Tei index can provide objective information of RV function in patents with acute PTE. 2318 Subendocardial myocardial systolic dysfunction in diabetes mellitus by Doppler myocardial imaging Deng Y-B, Shi X-H, Bi X-J, Yang H-Y, Li C-L, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China Objectives: This study sought to evaluate the subendocardial myocardial systolic function in patients with type II diabetes mellitus (DM) by Doppler myocardial imaging. Methods: The study population consisted of 52 DM patients and 28 healthy subjects. The longitudinal systolic velocity was measured at the mitral annulus at six sites in the left ventricle. In addition, the systolic myocardial velocity gradient was obtained from the left ventricular posterior wall in parasternal long-axis plane. Results: Although the ejection fraction was not statistically different between DM patients (69 ⫾ 8%) and healthy subjects (69 ⫾ 7%, p ⬎ 0.05), the mean longitudinal systolic velocity at mitral annulus in DM patients (5.8 ⫾ 1.6 cm/s) was significantly lower than that in healthy subjects (7.8 ⫾ 1.7 cm/s, p ⬍ 0.01). In addition, there was a significant difference in the systolic myocardial velocity gradient in the left ventricular posterior wall between DM patients (1.3 ⫾ 1.0 1/s) and healthy subjects (2.5 ⫾ 2.3 1/s, p ⬍ 0.01).
Objectives: To assess segmental myocardial longitudinal ⑀ (strain), D (displacement) of LV and to evaluate the spatial correlation. Methods: The apical four chamber view were acquired in pacing group (n ⫽ 12), RBBB (n ⫽ 13) and healthy individuals (n ⫽ 14) using GE Vivid 7 dimension for analysis of the longitudinal LV myocardial segmental (apical and basal segments ) ⑀ and D. Results: (1) Intra-group: for segmental myocardial ⑀ in contrast group, apical and basal of septum had no different (p ⬎ 0.05) but others segments. In RBBB group lateral apical segment and septal apical segment had different except others. In pacing group except lateral basal segment and basal segment of septum, there were different for others. All the segmental D were different in contrast group (p ⬍ 0.05) but in other groups, there was no difference between lateral apical segment and septal apica. (2) Inter-group: for the matched segmental D, ⌬ [D(apical) – D(basal)], ⑀ and ⌬⑀, there was no difference except lateral wall (p ⫽ 0.04, p ⫽ 0.008). (3) In RBBB group ⌬ ⑀ negatively correlated to ⌬ D only for lateral wall ( p ⫽ 0.037, r ⫽ ⫺0.603). In other two groups there was no statistic correlation. Conclusions: Speckle tracking may be used for the quantification to assess regional and global LV function.
2320 The study of strain rate imaging in evaluating left ventricular systolic function in essential hypertension patients with different left ventricular patterns Ruiqiang G, Wenli J, Renmin Hospital of Wuhan University, China Objectives: To explore the relationship among left ventricular (LV) peak systolic strain rate, the mitral annular motive amplitude (MAMA) and left ventricular ejection fraction (LVEF) in essential hypertension patients. Methods: According to level of left ventricular mass index (LVMI) and relative wall thickness (RWT), 40 patients with hypertension were divided into patterns of normal geometric LV (LVN, n ⫽ 20) and remodeling LV (LVR, n ⫽ 20). The MAMA of each left ventricular wall was determined by anatomic M-mode (AMM) and strain rate imaging was applied for obtaining peak systolic strain rate (SSR) of the LV basal and middle segments. Results: Mean SSR of LV wall correlated negatively and closely with mean MAMA (r ⫽ ⫺0.91, p ⬍ 0.05) and with the LVEF (r ⫽ ⫺0.89, p ⬍ 0.05). Mean SSR of the basal and middle segments in six walls was significantly descending in the control groups, LVN group, and LVR group (p ⬍ 0.05). Although MAMA and LVEF were lower in LVR group than in LVN group (p ⬍ 0.05), there had no significant difference between control group and LVN group (p ⬎ 0.05). Conclusions: SSR correlate closely to MAMA and EF, and SRI provides a sensitive, simple and trusted tool to assess global LV function in patients with essential hypertension.
Ultrasound in Medicine and Biology
Volume 32, Number 5S, 2006
apex rotated counterclockwise as viewed from the apex whereas the base rotated clockwise. LV segmental rotation degrees and LV segmental and global torsion were not significantly changed after hemodialysis. Conclusions: LV torsion is not influenced by preload change and can be used as a parameter of cardiac performance without load dependency.
Conclusions: The present study showed decreased longitudinal systolic velocity at mitral annulus and systolic myocardial velocity gradient in patients with type II diabetes mellitus with preserved global systolic function when compared with the healthy subjects, indicating that the subendocardial myocardial systolic function is impaired in diabetes mellitus patients.
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2319
Objective assessment of right ventricular systolic function with midventricular systolic strain in patients with acute pulmonary thromboembolism Park J-H, Park SJ, Lee MS, Park YS, Lee J-H, Choi S-W, Jeong J-O, Seong IW, Chungnam National University, Korea
Evaluation on left ventricular segmental myocardial longitudinal strain and displacement by speckle tracking imaging Uo MQ, Sichuan Provincial Hospital, China
Objectives: The presence of right ventricular (RV) dysfunction is associated with poor prognosis in patients with acute pulmonary thromboembolism (PTE). We aimed to evaluate RV function objectively with strain analysis. Methods: From March 2005 to October 2005, total 16 consecutive patients (8 males, mean 64 ⫾ 19 years; range 22 to 84) with acute PTE were included. Echocardiographic data including RV Tei index and RV strain were assessed by Vivid 7 (GE Medical Systems, Waukesha, Wisconsin). Results: Mean RVEF was 25.0 ⫾ 13.0%, fractional area change of RV (FACRV) was 19.4 ⫾ 12.7% and RV Tei index was 0.96 ⫾ 0.30 and TR Vmax was 4.2 ⫾ 0.6m/s at baseline. Systolic strain of midventricle was decreased (RV base: ⫺22.1 ⫾ 7.6%, midventricle: 0.2 ⫾ 18.8%, apex: ⫺12.8 ⫾ 8.9%). Follow-up data were obtained in 13 patients after successful treatment. Mean RVEF and FACRV was increased to 49.5 ⫾ 10.7% and 37.4 ⫾ 8.0% (p ⬍ 0.001, respectively) and RV Tei index to 0.48 ⫾ 0.16 (p ⫽ 0.006). Also, RV strain was increased significantly, especially in midventricle(base: ⫺24.0 ⫾ 9.6%, p ⫽ 0.373, midventricle: ⫺24.9 ⫾ 8.0%, p ⬍ 0.001, apex: ⫺13.2 ⫾ 14.0%, p ⫽ 0.917). RVEF and FACRV were negatively correlated with midventricular systolic strain (r ⫽ ⫺0.705 and r ⫽ ⫺0.621, p ⬍ 0.001, respectively) and RV Tei index (r ⫽ ⫺0.421 and r ⫽ ⫺0.504, p ⫽ 0.023 and p ⫽ 0.009, respectively). Conclusions: Midventricular systolic strain and RV Tei index can provide objective information of RV function in patents with acute PTE. 2318 Subendocardial myocardial systolic dysfunction in diabetes mellitus by Doppler myocardial imaging Deng Y-B, Shi X-H, Bi X-J, Yang H-Y, Li C-L, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China Objectives: This study sought to evaluate the subendocardial myocardial systolic function in patients with type II diabetes mellitus (DM) by Doppler myocardial imaging. Methods: The study population consisted of 52 DM patients and 28 healthy subjects. The longitudinal systolic velocity was measured at the mitral annulus at six sites in the left ventricle. In addition, the systolic myocardial velocity gradient was obtained from the left ventricular posterior wall in parasternal long-axis plane. Results: Although the ejection fraction was not statistically different between DM patients (69 ⫾ 8%) and healthy subjects (69 ⫾ 7%, p ⬎ 0.05), the mean longitudinal systolic velocity at mitral annulus in DM patients (5.8 ⫾ 1.6 cm/s) was significantly lower than that in healthy subjects (7.8 ⫾ 1.7 cm/s, p ⬍ 0.01). In addition, there was a significant difference in the systolic myocardial velocity gradient in the left ventricular posterior wall between DM patients (1.3 ⫾ 1.0 1/s) and healthy subjects (2.5 ⫾ 2.3 1/s, p ⬍ 0.01).
Objectives: To assess segmental myocardial longitudinal ⑀ (strain), D (displacement) of LV and to evaluate the spatial correlation. Methods: The apical four chamber view were acquired in pacing group (n ⫽ 12), RBBB (n ⫽ 13) and healthy individuals (n ⫽ 14) using GE Vivid 7 dimension for analysis of the longitudinal LV myocardial segmental (apical and basal segments ) ⑀ and D. Results: (1) Intra-group: for segmental myocardial ⑀ in contrast group, apical and basal of septum had no different (p ⬎ 0.05) but others segments. In RBBB group lateral apical segment and septal apical segment had different except others. In pacing group except lateral basal segment and basal segment of septum, there were different for others. All the segmental D were different in contrast group (p ⬍ 0.05) but in other groups, there was no difference between lateral apical segment and septal apica. (2) Inter-group: for the matched segmental D, ⌬ [D(apical) – D(basal)], ⑀ and ⌬⑀, there was no difference except lateral wall (p ⫽ 0.04, p ⫽ 0.008). (3) In RBBB group ⌬ ⑀ negatively correlated to ⌬ D only for lateral wall ( p ⫽ 0.037, r ⫽ ⫺0.603). In other two groups there was no statistic correlation. Conclusions: Speckle tracking may be used for the quantification to assess regional and global LV function.
2320 The study of strain rate imaging in evaluating left ventricular systolic function in essential hypertension patients with different left ventricular patterns Ruiqiang G, Wenli J, Renmin Hospital of Wuhan University, China Objectives: To explore the relationship among left ventricular (LV) peak systolic strain rate, the mitral annular motive amplitude (MAMA) and left ventricular ejection fraction (LVEF) in essential hypertension patients. Methods: According to level of left ventricular mass index (LVMI) and relative wall thickness (RWT), 40 patients with hypertension were divided into patterns of normal geometric LV (LVN, n ⫽ 20) and remodeling LV (LVR, n ⫽ 20). The MAMA of each left ventricular wall was determined by anatomic M-mode (AMM) and strain rate imaging was applied for obtaining peak systolic strain rate (SSR) of the LV basal and middle segments. Results: Mean SSR of LV wall correlated negatively and closely with mean MAMA (r ⫽ ⫺0.91, p ⬍ 0.05) and with the LVEF (r ⫽ ⫺0.89, p ⬍ 0.05). Mean SSR of the basal and middle segments in six walls was significantly descending in the control groups, LVN group, and LVR group (p ⬍ 0.05). Although MAMA and LVEF were lower in LVR group than in LVN group (p ⬍ 0.05), there had no significant difference between control group and LVN group (p ⬎ 0.05). Conclusions: SSR correlate closely to MAMA and EF, and SRI provides a sensitive, simple and trusted tool to assess global LV function in patients with essential hypertension.