tvl

Objective To evaluate the diagnostic value of echocardiography in tricuspid valve lesions ( TVL ) .

目的评价超声心动图对三尖瓣病变的诊断价值。

Results Echocardiography detected 2 cases of rheumatic TVL and 11 cases of congenital TV deformity in 13 patients .

结果13例患者中，超声心动图诊断风湿性三尖瓣狭窄和/或闭锁不全2例，先天性三尖瓣畸形11例。

Their logic operating patterns are given and the transient response characteristics of the linear AND-OR gates operating in TVL are analyzed .

给出了它们的研制结果、逻辑操作波形以及线性与或门三值运用时的瞬态特性分析结果。

Methods Thirteen patients with TVL underwent echocardiographic examinations including 2-dimensional ultrasonography , freguency spectrum and color Doppler flow imaging .

方法13例三尖瓣病变患者均经超声心动图包括二维超声、频谱多普勒及彩色多普勒超声检查。

The limiting resolution of 800 TVL for 1 inch tubes and about 700 TVL 2 / 3 inch tubes are observed .

1英寸管的极限分辨率为800TVL，2/3英寸管的为700TVL。衰减惰性稍大，尚须改进。