共 28 条
Relation between left ventricular regional radial function and radial wall motion abnormalities using two-dimensional speckle tracking in children with idiopathic dilated cardiomyopathy
被引:44
作者:

Friedberg, Mark Kevin
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h-index: 0
机构:
Hosp Sick Children, Labatt Family Heart Ctr, Div Paediat Cardiol, Toronto, ON M5G 1X8, Canada Hosp Sick Children, Labatt Family Heart Ctr, Div Paediat Cardiol, Toronto, ON M5G 1X8, Canada

Slorach, Cameron
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机构:
Hosp Sick Children, Labatt Family Heart Ctr, Div Paediat Cardiol, Toronto, ON M5G 1X8, Canada Hosp Sick Children, Labatt Family Heart Ctr, Div Paediat Cardiol, Toronto, ON M5G 1X8, Canada
机构:
[1] Hosp Sick Children, Labatt Family Heart Ctr, Div Paediat Cardiol, Toronto, ON M5G 1X8, Canada
关键词:
D O I:
10.1016/j.amjcard.2008.03.064
中图分类号:
R5 [内科学];
学科分类号:
1002 ;
100201 ;
摘要:
Left ventricular (LV) regional radial function and its relation to radial wall motion abnormalities have not been investigated in children with idiopathic dilated cardiomyopathy (IDC). Radial strain was measured using 2-dimensional speckle tracking to evaluate regional radial function and wall motion in 6 LV segments in 24 children (0 to 18 years old) with IDC and 16 healthy controls. Patients and controls were similar in age. Patients with IDC had higher heart rates (97 +/- 28 vs 77 +/- 19, p <0.05) and decreased ejection fraction (34 +/- 12% vs 66 +/- 7%, p <0.0001) compared with controls. Radial strain in all segments was significantly lower in patients with IDC. In IDC, average radial strain correlated well with ejection fraction (r = 0.8, p <0.0001). The SD of time to peak radial strain among 6 LV segments was significantly higher in patients with IDC than in controls (56 38 vs 15 12 ms, p <0.0001). Segmental peak radial strain correlated closely to time to peak radial strain in controls (r = 0.98, p = 0.0008), but less in patients with IDC (r = 0.76, p = 0.07). In conclusion, LV regional radial function is impaired in pediatric IDC, in association with increased radial dyssynchrony, revealing a possible important mechanism for LV dysfunction in these children. (C) 2008 Elsevier Inc.
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页码:335 / 339
页数:5
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