问题 单项选择题 A型题

关于蝉联现象的表述,不正确的是()。

A.是指激动沿一侧传导径路下传的同时对另一侧径路连续产生隐匿性传导,使另一侧径路传导发生连续性功能性阻滞

B.可发生于房室结快慢径路之间

C.预激旁路与正常房室传导系统之间不会发生蝉联现象

D.心房颤动时出现连续的宽大畸形QRS波群,可以是束支间发生蝉联现象所致

E.心房扑动时也可发生束支间蝉联现象,并出现连续的宽大畸形QRS波群

答案

参考答案:C

解析:只要存在两条传导径路,且两者的不应期和传导速度的差别达到一定程度时,都有可能发生蝉联现象。因此,在预激旁路与正常房室传导系统之间也可发生蝉联现象。

完形填空

Walking for the Heart Disease

Walking is one of the most important steps for the recovery of heart disease. Time and speed are two vital aspects of walking for people with heart disease. One must walk for at least thirty five minutes per day.    小题1:    The following understanding will help them to walk.

Why walking?

Walking is a must for a heart patient.    小题2:  First, it reduces weight, controls sugar, and reduces stress. It also gives the joints (关节) enough movement, fresh air – if you walk in the morning. Regular walks help in the control of blood pressure. But the most important advantage is that it gives fitness to the heart.

  小题3:  

Start walking slowly. Gradually increase the speed. Feel when the angina (心绞痛) is about to come. Stop, the feeling will go away. Walk again, but now the speed will be slower than the last time. Keep walking now and the angina will not come. This is the correct speed.  

How to start?

Suppose, you are at the stage of Class I angina: start walking on Day One. Try to walk about 30 minutes. For Class II angina group, walking should be slow and they should start with 10-15 minutes. They should not walk fast. Class III angina patients should start with one minute at home on empty stomach. After two days, they should increase to two minutes.    小题4:  

However, do not walk more than ten minutes a time.

Dos and don’ts on physical activity:

Heart patients must also know that they can do most of the activities where the heart rate does not go up. Sitting in an office, talking over the phone, discussing, driving car are some of the activities which do not increase the heart’s speed.     小题5:   As a matter of fact, stresses can also lead to other illnesses.

A.It has a great number of advantages.

B.Walking plays a very important role in helping a heart patient recover.

C.How to roughly judge the proper walking speed?

D.What is more important for the heart patient is to know the speed of walking.E. But avoid all kinds of stresses, as stress can increase the heart’s speed.

F. How to increase the speed of walking?

G. Gradually they should increase the time but not the speed. 

判断题