Left ventricular structure and diastolic function by cardiac magnetic resonance imaging in hypertrophic cardiomyopathy

被引:23
|
作者
Chacko, Binita Riya [1 ,3 ]
Karur, Gauri R. [1 ]
Connelly, Kim A. [2 ,4 ]
Yan, Raymond T. [4 ]
Kirpalani, Anish [1 ,4 ]
Wald, Rachel [4 ,5 ]
Jimenez-Juan, Laura [6 ]
Jacob, John Roshan [7 ]
Deva, Djeven P. [1 ,4 ]
Yan, Andrew T. [2 ,4 ]
机构
[1] St Michaels Hosp, Dept Med Imaging, Toronto, ON, Canada
[2] St Michaels Hosp, Terrence Donnelly Heart Ctr, Toronto, ON, Canada
[3] Christian Med Coll & Hosp, Dept Radiol, Vellore, Tamil Nadu, India
[4] Univ Toronto, Toronto, ON, Canada
[5] Toronto Gen Hosp, Div Cardiol, Toronto, ON, Canada
[6] Sunnybrook Hlth Sci Ctr, Dept Med Imaging, Toronto, ON, Canada
[7] Christian Med Coll & Hosp, Dept Cardiol, Vellore, Tamil Nadu, India
关键词
Diastolic function; Hypertension; Hypertrophic cardiomyopathy; Left ventricle; Magnetic resonance imaging;
D O I
10.1016/j.ihj.2016.12.021
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Objective: Diastolic dysfunction is common in hypertrophic cardiomyopathy (HCM) and hypertensive heart disease (HHD), but its relationships with left ventricular (LV) parameters have not been well studied. Our objective was to assess the relationship of various measures of diastolic function, and maximum left ventricular wall thickness (MLVWT) and left ventricular mass index (LVMI) in HCM, HHD and normal controls using cardiac magnetic resonance imaging (CMR). We also assessed LV parameters and diastolic function in relation to late gadolinium enhancement (LGE) and right ventricular (RV) hypertrophy in HCM. Methods: 41 patients with HCM, 21 patients with HHD and 20 controls were studied. Peak filling rate (PFR), time to peak filling (TPF), MLVWT and LVMI were measured using CMR. LGE and RV morphology were assessed in HCM patients. Results: MLVWT correlated with TPF in HCM (r = 0.38; p = 0.02), HHD (r = 0.58; p = 0.01) and controls (r = 0.54; p = 0.01); correlation between MLVWT and TPF was weaker in HCM than HHD. LVMI did not correlate with diastolic function. In HCM, LGE extent correlated with MLVWT (tau = 0.41; p = 0.002) and with TPF (tau = 0.29; p = 0.02). The HCM patients with RV hypertrophy had higher MLVWT (p < 0.001) and TPF (p = 0.03) than patients without RV hypertrophy. Conclusion: MLVWT correlates with diastolic function (TPF) in HCM, HHD and controls. LVMI did not show significant correlation with TPF. The diastolic dysfunction in HCM is not entirely explained by wall thickening. LGE and RV involvement are associated with worse LV diastolic function, suggesting that these may be markers of more severe underlying myocardial disarray and fibrosis that contribute to diastolic dysfunction. (C) 2016 Published by Elsevier B.V. on behalf of Cardiological Society of India.
引用
收藏
页码:75 / 81
页数:7
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