Final answer:
The question is about heart rate and its improvement with positive pressure ventilation (PPV) in a health context.
Step-by-step explanation:
In the context of health, the question is asking about a person's heart rate (hr) and its improvement with positive pressure ventilation (PPV). A normal heart rate falls within the range of 60-100 beats per minute (bpm). If a person's heart rate is within this range and it is improving with PPV, it suggests that the ventilation is positively impacting their cardiovascular system.