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Prominent basal and middle strain longitudinal involvement in newly-diagnosed and never treated hypertensive patients without clear-cut hypertrophy.
International Journal of Cardiology ( IF 3.2 ) Pub Date : 2020-01-16 , DOI: 10.1016/j.ijcard.2020.01.038
Maria Lembo 1 , Ciro Santoro 1 , Regina Sorrentino 1 , Valeria Fazio 2 , Mario Enrico Canonico 1 , Luigi Chiariello 2 , Maurizio Galderisi 1 , Roberta Esposito 3
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BACKGROUND Left ventricular (LV) global longitudinal strain (GLS) can detect an early dysfunction in arterial hypertension. We investigated regional LV patterns of longitudinal strain (LS) and base-to-apex behaviour in newly diagnosed, never-treated hypertensive patients (HTN) without LV hypertrophy. METHODS 180 HTN and 115 healthy controls underwent standard echocardiography, including regional LS and GLS assessment (in absolute values). The average LS of six basal (BLS), six middle (MLS), and six apical (ALS) segments and relative regional strain ratio = [ALS/(BLS + MLS)] were also computed. RESULTS The two groups were comparable for sex, age and heart rate. Body mass index (BMI), systolic, diastolic and mean blood pressure (BP) (all p < 0.0001) were higher in HTN. Despite LV ejection fraction (EF) was comparable, GLS, BLS and MLS resulted lower in HTN (all p < 0.0001), without difference in ALS. Relative regional strain ratio resulted higher in HTN (p < 0.001). Dividing HTN group according to lower normal values derived from the controls, BLS was able to identify a higher rate of LV dysfunction than GLS. By a multiple linear regression analysis performed in the pooled population after adjusting for age, sex, BMI, end-systolic stress, relative wall thickness and LV mass index, the association between BLS and mean BP remained significant (β coefficient = -0.42, p < 0.0001), despite the significant impact of male sex. In a similar model, MLS and mean BP resulted also independently associated (β = -0.21, p < 0.002). CONCLUSIONS Despite normal LV EF, LS dysfunction is detectable in HTN, mainly involving basal and middle segments, resulting in higher relative regional strain ratio.

中文翻译:

在没有明确的肥大的情况下,初诊和从未接受治疗的高血压患者中,基底和中部应变明显受累。

背景技术左心室(LV)整体纵向应变(GLS)可以检测出动脉高血压的早期功能障碍。我们调查了没有LV肥大的新诊断,未经治疗的高血压患者(HTN)的纵向应变(LS)和基底到顶点行为的区域LV模式。方法对180名HTN和115名健康对照进行标准超声心动图检查,包括局部LS和GLS评估(绝对值)。还计算了六个基底(BLS),六个中间(MLS)和六个顶端(ALS)段的平均LS,以及相对区域应变比= [ALS /(BLS + MLS)]。结果两组在性别,年龄和心率上均具有可比性。HTN的体重指数(BMI),收缩压,舒张压和平均血压(BP)均较高(均p <0.0001)。尽管左心室射血分数(EF)相当,但GLS,BLS和MLS导致HTN降低(所有p <0.0001),而ALS没有差异。相对区域应变比导致HTN较高(p <0.001)。根据从对照组得到的较低的正常值划分HTN组,BLS能够比GLS识别出更高的LV功能障碍率。在对年龄,性别,BMI,收缩末期压力,相对壁厚和LV质量指数进行校正后,通过对合并人群进行多元线性回归分析,BLS和平均BP之间的关联仍然显着(β系数= -0.42,p <0.0001),尽管对男性有重大影响。在类似的模型中,MLS和平均BP结果也独立相关(β= -0.21,p <0.002)。结论尽管LV EF正常,但在HTN中仍可检测到LS功能障碍,主要涉及基底和中段,
更新日期:2020-01-16
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