Answer:
Step-by-step explanation:
High-altitude exposure may unpredictably precipitate an acute coronary syndrome or death. Not only will sea level exercise capacity be reduced on account of physiological changes, but angina may worsen at least for the first few days in association with increased heart rate and systolic blood pressure.
he hypoxia of high altitude produces sustained stimulation of the sympathetic nervous system. Initially, this increases heart rate, but, with time, the responsiveness of the heart decreases, so the initial tachycardia may not be sustained.