Exercise 5. Insert articles or possessive pronouns where necessary:
Heart attack is recognized by ... sudden onset of ... severe pain across ... chest, radiating to the shoulder and left arm. Rhythmically applying pressure to ... chest is repeated 80 times ... minute and is called external cardiac compression. Combined with artificial respiration it can keep ... patient alive until ... expert medical help is available.
Exercise 6. Insert prepositions where necessary:
The pain ... myocardial infarction is far more severe than other heart pains. The patient may collapse and cardiac arrest can occur.
Vomiting is common and there is a risk ... blockage .. the airway. The skin is pale, pulse weak, blood pressure low. Complete blockage means that the portion ... heart muscle which is supplied ... the blocked artery cannot function any longer, the heart may stop beating altogether.