Answer:
Use of oil and vinegar prevents spoilage of pickles because bacteria cannot live in such an environment. Vegetables, fruits, fish and meat are often preserved by this method.
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Bradycardia is the most ominous sign of impending cardiopulmonary arrest in infants and children.
Bradycardia is a slow heart rate. The hearts of adults at rest usually beat between 60 and 100 times a minute. The heart beats fewer than 60 times a minute.
Bradycardia can be a serious problem if the heart rate is very slow and the heart can't pump enough oxygen-rich blood to the body. If this happens, one may feel dizzy, very tired or weak, and short of breath. Sometimes bradycardia doesn't cause symptoms or complications.
Cardiopulmonary arrest is the cessation of adequate heart function and respiration and results in death without reversal.
Learn more about cardiopulmonary arrest here: brainly.com/question/21097188
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