Impact of ventricular dyssynchrony on postexercise accommodation of systolic myocardial motion in hypertensive patients with heart failure and a normal ejection fraction: A tissue-Doppler echocardiography study

Yi Chih Wang, Chih Chieh Yu, Fu Chun Chiu, Ruth Klepfer, Kathryn Hilpisch, Vincent Splett, Chia Ti Tsai, Ling Ping Lai, Juey Jen Hwang, Jiunn Lee Lin

研究成果: 雜誌貢獻文章

4 引文 斯高帕斯(Scopus)

摘要

Background: We hypothesized left ventricular (LV) dyssynchrony would affect postexercise accommodation of regional myocardial motion in patients with heart failure and a normal ejection fraction (HFNEF). Methods and Results: Tissue-Doppler echocardiography was studied in 100 hypertensive patients with LV ejection fraction >50%. Among them, 70 HFNEF patients were classified into the systolic dyssynchrony (Dys: >65 ms difference of electromechanical delay between septal and lateral segments) (43 patients) and nondyssynchrony (Ndys: 27 patients) groups, and the other 30 patients were as the control (Ctrl). The systolic myocardial velocities (Sm) of 6-basal LV segments at baseline and after exercise were analyzed. When compared with the Ctrl group, the baseline lower mean Sm of 6 LV segments in the Ndys group could increase to a similar postexercise level as that in the Ctrl group, whereas that in the Dys group remained lower after exercise (7.8 ± 1.3 versus Ndys: 8.6 ± 1.5 and Ctrl: 8.9 ± 1.2 cm/s, P <.05, respectively). This is mainly due to a much higher percentage increase of lateral Sm after exercise in the Ndys group (Ndys: 49 versus Dys: 29%, P <.05). Conclusions: Dyssynchrony-related regional myocardial contractile abnormality after exercise in HFNEF patients suggested the detrimental impact of electromechanical uncoupling on HF symptoms.
原文英語
頁(從 - 到)134-139
頁數6
期刊Journal of Cardiac Failure
18
發行號2
DOIs
出版狀態已發佈 - 二月 1 2012
對外發佈Yes

    指紋

Keywords

  • dyssynchrony
  • exercise
  • Heart failure with a normal ejection fraction
  • myocardial contraction

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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