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- W2384455769 abstract "Objective To quantitatively assess the regional myocardial cardiac intervals in the patients with heart failure by tissue Doppler imaging(TDI).Methods The apical 4 chamber view of two-dimensional TDI was acquired in 30 healthy individuals(control group) and 18 patients with heart failure(heart failure group) by GE VIVID7 commercially machine.The basal segments in left and right ventricle were analyzed in TVI model.The following cardiac intervals were measured in each segment which included ①the isovolumetric systolic time;②period of rapid ejection;③period of slow ejection;④the isovolumetric relaxation time;⑤the rapid inflow time;⑥diastaseis;⑦the atrial systolic time;and then calculate the percentage of these intervals in systolic time and relaxation time.Results The percentage of left ventricular systolic time didn′t change in patients with heart failure,and that of right ventricular became lower.The percentages of isovolumetric contraction time in left and right ventricular were all higher in heart failure group.The percentage of the period of rapid ejection became higher in left ventricular and lower in right ventricular in heart failure group.The percentage of the period of slow ejection became lower in left ventricular,but it didn′t change in right ventricular.The percentages of the isovolumetric relaxation time were all higher in left and right ventricular in heart failure group than that in control group.The percentages of the rapid inflow time became lower remarkably in right ventricular and didn′t change in left ventricular.The percentages of the diastaseis in left ventricular became lower and higher in right ventricular.The percentages of the atrial contraction time were higher in left ventricular and lower in right ventricular than that in control group.The differences of cardiac intervals between left and right ventricular were significant in control group,but it disappeared in heart failure group.Conclusion There are characteristic changes on cardiac intervals in the patients with heart failure.In heart failure group the differences of cardiac intervals in control group between left and right ventricular disappear." @default.
- W2384455769 created "2016-06-24" @default.
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- W2384455769 date "2006-01-01" @default.
- W2384455769 modified "2023-09-23" @default.
- W2384455769 title "The characterization of cardiac intervals in the patients with heart failure." @default.
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