HI I have gone through your mail and as you said you are having sinus infection
,chest congestion and you re a cardiac patient with pacemaker. After understanding your problem I would like to say that your all problems are interrelated, as sinusitis
is a well known disease to give rise to throat infection
which if remain untreated may give rise to chest congestion, In your case this chest congestion may also be due to cardiac factor.thus you really need two specialists ( E.N.T. & Cardiologist ) and by the combine efforts of the two your pathology can be worked out than final treatment may be planed.Thanks.