For a 67 year old healthy man, this is just a simple problem. It is just because of the overfilling of gas inside the body, nothing big to worry about. Normally, the gas will go down, but at certain time it will go upwards when these sorts of problems occurs viz high pulse rate and blood pressure or whatever.
So I kindly request you to consult your doctor for gas problems, ones it's gone out everything will be normal and there will not be any big issues such as heart attack
or anything like that. But make sure he stays normal without any gas problems, because the more he stays like this with gas inside him there will surely be issues such as heart pain or it (the gas) may even get to the head which will become a serious problem.
So please consult a doctor and make sure you bring all those gas down from his body. He will be fit and healthy as always.
Thank you very much.
Dr. A. Abdul Rahim