Objective To discuss the influence of preexcatation syndrome on QRS middlevector and its clinical significance.
目的探讨预激综合征对QRS中间向量的影响及临床意义。
2
Normal vector points up. Imagine that you put your thumb along c, your index towards s and then your middle finger points up.
法向量向上,想象你把你的大拇指沿着C放,食指指向s,那么你的中指就会向上。
3
That one would be pointing kind of to the back slightly up maybe, so like that. And now your middle finger is going to point in the direction of the normal vector.