Final answer:
The question posed is not clear as the provided options do not match the standard normal adult resting heart rate range of . Without further context, it is not possible to confidently provide an answer from the given choices.
Step-by-step explanation:
On heart rate or cardiac status, a '
' signifies that the heart rate (HR) is above normal resting values. For an adult, a normal resting heart rate typically lies within the range of
. Therefore, it makes logical sense that the missing value the question is seeking would be
, the upper limit of this normal range, which would imply tachycardia if exceeded during a resting state. However, the options provided in the question
don't include
. Thus, these options might be referring to another scale or standard specific to a text or resource not fully provided in the question. Without additional context that aligns with one of the given choices, it is not possible to confidently select an answer from the provided options.
To elaborate on heart rates, bradycardia occurs when the resting rate drops below
. In contrast, tachycardia is when the resting rate exceeds
. Trained athletes often have lower heart rates, and maximum HRs usually range between
but tend to decrease with age. For instance, a
-year-old is expected to hit a maximum rate of approximately
. As the heart rate increases significantly, such as above
in a healthy young adult, cardiac output may increase or decrease depending on a variety of physiological factors.