One purpose may be to check for cancer. If abnormal cells are found, there might be something wrong...
Answer:
<em><u>"The number of squares between each QRS complex and multiplying by 40 milliseconds. Gives you the cycle length of a patient's heart rate. You then divide 60,000."</u></em>
Answer:
The product's label is the right answer because it will tell you all the uses and directions for it. If your need is there, then it meets your need, simple as that.