I have had 3 episodes in the last 3 years where I get a chest cold and it rapidly escalates to pulmonary insufficiency and I have to use home O2 therapy for 24/7 for about 2 months. It then goes away and I return to my pre-episode state of health. I have congenital scoliosis about 110 degrees in magnitude. The lungs are small ( I only weigh 68 lbs. and stand 4 4.75 in height. Friday, 12/29, I started my 4th episode. This morning I awoke with swollen feet past the ankles. The doctor gave me Lasix for the last episode and I didn t finish them, so I took one this AM. Could this indicate heart failure?