定量组织速度成像及脑钠肽评价增龄对左心功能的影响

目的 应用定量组织速度成像(QTVI)技术及脑钠肽(BNP)的测定,评价增龄对左心室收缩及舒张功能的影响.方法 将60例年龄36～82岁的正常健康人分为<60岁组(32例)与≥60岁组(28例),对比2组传统心脏超声、QTVI、BNP指标,分析增龄与传统超声参数、QTVI参数及BNP之间的关系.结果 年龄≥60岁组与年龄<60岁组比较,二尖瓣口舒张早期与舒张晚期血流速度比(E/A)(0.92±0.18、1.28±0.18)、二尖瓣环6个位点平均收缩期峰值速度(Sm)(6.04±0.77)、(6.89±1.03)cm/s]、平均舒张早期峰值速度(Em)(5.67±0.99)、(7.29±1.11)cm/s]、平均舒张早期与舒张晚期峰值速度比(Em/Am)(0.79±0.13)、(1.18±0.33)]明显减低(t值分别为5.396、2.478、4.075、3.535,P均<0.05),平均舒张晚期峰值速度(Am)(7.67±0.80)、(6.80±1.16)cm/s]、二尖瓣口舒张早期血流速度与二尖瓣环平均舒张早期峰值速度比(E/Em)(14.83±4.43)、(10.68±2.85)]、BNP(51.25±12.21)、(14.15±6.68)ng/L]明显升高(t值分别为-2.268、-2.995、-3.523,P均<0.05).年龄与平均Sm、平均Em、平均Em/Am、E/A呈负相关(r值分别为-0.411、-0.631、-0.622、-0.614,P均<0.05),与平均Am、平均E/Em、BNP呈正相关(r值分别0.481、0.614、0.684,P均<0.05).结论 增龄使左心室收缩及舒张功能均受损,QTVI及BNP检查评价心室功能敏感而简便易行.

Abstract：

Objective To evaluate the influence of aging on left ventricular systolic and diastolic function by quantitative tissue velocity image(QTVI) and B-type natriuretic peptide (BNP). Methods Sixty healthy participants aged from 36 to 82 years old were divided into age <60 years group (32 cases) and age≥60 years old group (28 cases). Compared traditional echocardiography,QTVI and BNP between the two groups, and analysised the correlation between age and the abovementioned measurements. Results Compared age ≥60 years group with age <60 years group, the ratio of early to late mitral annulus flow velocity(E/A) (0. 92 ±0. 18 vs. 1. 28 ± 0. 18), mean of systolic mitral annulus velocity (Sm) (6. 04 ± 0.77] cm/s vs.6. 89 ± 1. 03] cm/s) ,mean of early diastolic mitral annulus velocity (Em) (5. 67 ±0.99]cm/s vs. 7.29 ± 1. 11]cm/s),the ratio of Em to Am(Em/Am) (0. 79 ± 0. 13 vs. 1.18 ± 0. 33) were significantly decreased (t =5. 396,2.478,4.075,3. 535, respectively, Ps < 0. 05), whereas mean of late diastolic mitral annulus velocity (Am) (7. 67 ±0. 80]cm/s vs. 6. 80 ± 1. 16] cm/s),the ratio of E to Em(E/Em) (14. 83 ±4.43 vs. 10. 68 ±2. 85), BNP (51. 25 ± 12. 21] ng/L vs. 14. 15 ± 6. 68] ng/L) were significantly increased (t =-2. 268,-2.995 and-3. 523, Ps < 0.05) . Age was negatively correlated with Sm, Em, Em/Am, E/A (r =-0.411,-0. 631,-0.622,-0. 614,Ps<0.05),and age was positively correlated with Am,E/Em and BNP (r = 0.481,0.614 and 0. 684,Ps <0. 05). Conclusion Left ventricular systolic and diastolic function decreased with aging. QTVI and BNP could evaluate left ventricular function sensitively and easily.

Quantitative tissue velocity image and B-type natriuretic peptide evaluate the influence of aging on left ventricular systolic and diastolic function

Objective To evaluate the influence of aging on left ventricular systolic and diastolic function by quantitative tissue velocity image(QTVI) and B-type natriuretic peptide (BNP). Methods Sixty healthy participants aged from 36 to 82 years old were divided into age <60 years group (32 cases) and age≥60 years old group (28 cases). Compared traditional echocardiography,QTVI and BNP between the two groups, and analysised the correlation between age and the abovementioned measurements. Results Compared age ≥60 years group with age <60 years group, the ratio of early to late mitral annulus flow velocity(E/A) (0. 92 ±0. 18 vs. 1. 28 ± 0. 18), mean of systolic mitral annulus velocity (Sm) (6. 04 ± 0.77] cm/s vs.6. 89 ± 1. 03] cm/s) ,mean of early diastolic mitral annulus velocity (Em) (5. 67 ±0.99]cm/s vs. 7.29 ± 1. 11]cm/s),the ratio of Em to Am(Em/Am) (0. 79 ± 0. 13 vs. 1.18 ± 0. 33) were significantly decreased (t =5. 396,2.478,4.075,3. 535, respectively, Ps < 0. 05), whereas mean of late diastolic mitral annulus velocity (Am) (7. 67 ±0. 80]cm/s vs. 6. 80 ± 1. 16] cm/s),the ratio of E to Em(E/Em) (14. 83 ±4.43 vs. 10. 68 ±2. 85), BNP (51. 25 ± 12. 21] ng/L vs. 14. 15 ± 6. 68] ng/L) were significantly increased (t =-2. 268,-2.995 and-3. 523, Ps < 0.05) . Age was negatively correlated with Sm, Em, Em/Am, E/A (r =-0.411,-0. 631,-0.622,-0. 614,Ps<0.05),and age was positively correlated with Am,E/Em and BNP (r = 0.481,0.614 and 0. 684,Ps <0. 05). Conclusion Left ventricular systolic and diastolic function decreased with aging. QTVI and BNP could evaluate left ventricular function sensitively and easily.