JACC:健康衰老过程中心脏功能和血清B型利钠肽水平的变化

2019-10-09 国际循环编辑部 国际循环

衰老对心脏功能的影响尚未完全阐明,斑点追踪超声心动图可掩盖亚临床心脏功能障碍。JACC发表的一项研究调查健康老龄化对一般人群(无心血管危险因素和结构性心脏病)样本中左心室(LV),右心室(RV)和左心房(LA)性能的影响及其与血清B型利钠肽(BNP)水平的关系。

衰老对心脏功能的影响尚未完全阐明,斑点追踪超声心动图可掩盖亚临床心脏功能障碍。JACC发表的一项研究调查健康老龄化对一般人群(无心血管危险因素和结构性心脏病)样本中左心室(LV),右心室(RV)和左心房(LA)性能的影响及其与血清B型利钠肽(BNP)水平的关系。
 
研究采用斑点追踪超声心动图评估481例体重正常的健康参与者的LV整体纵向应变(LVGLS),RV游离壁应变和LA相应变。BNP升高被定义为男性BNP>37.82 pg/ml,女性BNP> 50.86 pg/ml。
 


(图引自原文献)
 
结果显示,受试者平均年龄为(60±12)岁(24~86岁),其中,46%的参与者为男性。最早的与年龄相关的心脏功能改变始于第5个10年的LA存储和导管应变,随后从第6个10年E/e'升高,从第7个10年LVGLS下降。而几十年来的RV应变,LV射血分数或LV质量指数则无显著差异。在多变量线性回归分析中,年龄是LVGLS降低(标准β=0.21;P<0.001)和LA相应变降低(存储和导管应变的标准β= -0.40和-0.61;P<0.001)的独立预测因子。年龄和LA应变与BNP值升高显著相关(校正OR为1.10和0.93;P<0.05),与心室形态和功能无关。
 
LA存储和导管应变的下降是与年龄有关的心脏重构的最早标志,而LA存储应变是血清BNP水平升高的独立预测因子,两者均可能是老年人心力衰竭风险增加的标志。
 
参考文献
Yuriko Yoshida, Koki Nakanishi, Masao Daimon, et al. Alteration of Cardiac Performance and Serum B-Type Natriuretic Peptide Level in Healthy Aging. JACC. October 2019.

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