The target heart rate (THR) zone range for a patient 50 years old would be
a. 80–136 c. 90–153.
b. 85–145 d. 95–162.
B
To calculate the target heart rate zone range:
1 . Subtract the patient's age in years from 220 to calculate the maximum heart rate.
2 . The low end of the patient's THR zone is 50% of the value obtained in step 1 . The high end of the patient's THR zone is 85% of the value obtained in step 1.
So, a 50-year-old's THR zone would be calculated as follows:
(220 - 50) x 0.50 = 85 (low end)
(220 - 50) x 0.85 = 145 (high end)
Thus, the patient's THR zone range would be 85–145 beats per minute.
You might also like to view...
The division of the skeletal system that comprises the skull, hyoid, vertebral column, and thorax is the _____________ division
ANS:
A researcher conducts a pilot study before the main study is conducted. Why might the researcher choose to do this? (Select all that apply.)
a. The researcher has no idea whether subjects will complete the various phases of the study. b. The researcher needs to know how much of a change will occur in the dependent variable, so that sample size can be determined. c. The researcher isn't sure whether the fourth phase of the study is really necessary. d. The study site is a new one, and the researcher wants to find out whether it's suitable for this kind of research. e. The researcher has insufficient funding for a large study. f. The researcher isn't sure whether the tool he or she is using to measure the dependent variable will be practical.
When caring for a postpartum woman experiencing hypovolemic shock, the nurse recognizes that the most objective and least invasive assessment of adequate organ perfusion and oxygenation is
a. Absence of cyanosis in the buccal mucosa b. Cool, dry skin c. Diminished restlessness d. Decreased urinary output
Which of the following best explains why structural changes occur within the brains of people with Alzheimer's disease?
1. Increased acetylcholine levels 2. Increases in blood pressure and cholesterol levels 3. Chronic inflammation and oxidate cellular damage 4. Cerebral bleeding and associated hypoxia