78例病人接受冠脉造影和次极量平板运动试验,探讨Q-Tc、Q-Tr和△Q-Tc预测冠脉病变的准确性。Q-Tc与Q-Tr的敏感度,特异度,阳性预测......

Seventy-eight patients underwent coronary angiography and submaximal tre-admill exercise test to evaluate the Q-Tc,Q-Tr ......

对７６头牦牛的Ｑ－Ｔｃ和Ｑ－Ｔｒ值研究表明，牦牛的Ｑ－Ｔｃ值具有年龄差异，成年牦牛，２岁牦牛和１－３月龄牦牛的Ｑ－Ｔｃ值分别为０．３１２，０．３２７和０．３４５。成年牦牛和２岁牦牛的Ｋ常数应定为０．３２ｓ，１－３月龄牦牛应定......

研究了青海高原黑白花奶牛、新疆褐牛、牦牛、青海细毛羊、青海杂种羊、藏羊、西德长毛兔和火鸡的Q-Tc和Q-Tr参考值.结果查明,上述......