How may resting heart rate change with cancer treatment?

How may resting heart rate change with cancer treatment?

• A. Resting heart rate may be elevated due to anaemia or deconditioning.
• B. Resting heart rate always decreases.
• C. Resting heart rate is unaffected by cancer treatment.
• D. Resting heart rate fluctuates randomly with no pattern.

Answer: (A)

Resting heart rate can rise during cancer treatment because the body faces stresses that reduce oxygen delivery and physical conditioning. Anemia from chemotherapy or blood loss lowers the blood’s oxygen content, so the heart may beat faster at rest to maintain adequate oxygen delivery to tissues. At the same time, deconditioning from fatigue and reduced activity lowers how efficiently the heart can pump (stroke volume), which the body often compensates for by increasing the heart rate. So, resting heart rate may be elevated rather than staying the same or decreasing. It’s not random or unrelated to treatment patterns; oxygen delivery needs and conditioning changes during treatment commonly drive this rise.

Resting heart rate can rise during cancer treatment because the body faces stresses that reduce oxygen delivery and physical conditioning. Anemia from chemotherapy or blood loss lowers the blood’s oxygen content, so the heart may beat faster at rest to maintain adequate oxygen delivery to tissues. At the same time, deconditioning from fatigue and reduced activity lowers how efficiently the heart can pump (stroke volume), which the body often compensates for by increasing the heart rate. So, resting heart rate may be elevated rather than staying the same or decreasing. It’s not random or unrelated to treatment patterns; oxygen delivery needs and conditioning changes during treatment commonly drive this rise.