Read the following passage and fill in each blank with one
word. Choose the correct word in one of the following three ways : according to
the context, by using the correct form of the given word, or by using the given
letters of the word. Remember to write the answers on, the answer
sheet.
Can exercise be a bad thing Sudden death during or soon after
strenuous exertion on the squash court or on the army training grounds is not
unheard of. Even trained marathon runners are not i (66) to
fatal heart attacks. But no one knows just (67) common these
sudden deaths linked to exercise are. The registration and investigation of such
c (68) is very patchy; only a national survey could
determine the true in (69) of sudden deaths in sports. But
the climate of medical opinion is shifting in (70) of
exercise, for the person recovering from a heart attack as well as the average
lazy individual. Training can help the victim of a heart attack by lowering the
(71) of oxygen the heart needs at any given level of work
(72) the patient can do more before reaching the point
(73) chest pains indicate a heart starved of oxygen. The
question is, should middle-aged people, in particular, be screened for signs of
heart disease before (74) up vigorous exercise
Most cases of sudden death in sport are caused by l (75)
arrhythmias in the beating of the heart, often in people with
(76) (diagnose) coronary heart disease. In North America a
(77) over 35 is advised to have a physical check-up and even
an exercise electrocardiogram. The British, on the whole, think all this testing
is unnecessary. Not many people die from exercise, (78) all,
and ECGs (心电图) are notoriously inaccurate. However, two medical cardiologists at
the Victoria Infirmary in Glasgow, advocate screening by exercise ECG for people
over 40, or younger people al (79) at risk of developing
coronary heart disease. Individuals (80) (show) a particular
abnormality in their ECGs have, they say, a 10 to 20 times greater risk of
subsequently developing signs of coronary heart disease, or of sudden
death.