It is possible to travel to Tibet with a pacemaker installed, but altitude reaction and long-distance trekking will increase the burden on the heart, and it is recommended not to go if it is accompanied by breathing difficulties and cardiac discomfort.
A pacemaker is an artificial electric current facility installed in patients with cardiac arrhythmia, sinus node insufficiency, etc., to keep the heart in normal mode.
After installing a pacemaker, the heart function is usually restored and it is possible to travel, but at the same time, attention should be paid to protection. Tibet is a plateau area with low oxygen content, which may cause plateau reaction and increase the load on the heart. At the same time traveling long distance trekking also has a greater load on the heart, so it is not recommended to travel to Tibet.
The specific situation varies from person to person, and you can further consult a specialist physician.