I have been having on and off breathlessness for 2-3 days I underwent ECG it was normal and D Dimer it was negative ( though readings are fluctuating from 0.25 to 0.4 and then 0.3) I also underwent ECHO. EF was 60% but only abnormalities were mild TR and RSVP 24 mm hg. Is it PAH ? Is my breathlessness due to this ? My SpO2 is always intact at 97-98%. I also have mild hepatomegaly due to fatty liver. Please tell.