The signs and symptoms you describe raise a red flag with me. I was diagnosed with a heart condition called "Peripartum Cardiomyopathy" soon after the birth of my daughter. PPCM is an enlargment of the left ventricle and reduced heart function (EF) that occurs in the last few months of pregnancy or in the first five months post-partum. Some women are VERY symptomatic and are in full blown congestive heart failure due to the decreased ejection fraction. Still others are mildly symptomatic and experience just fatigue and a little shortness of breath in the post-partum period. Because they are not extremely ill AND because PPCM often heals on it's own given enough time, these women are not diagnosed accurately.
Even as a cardiac nurse who specialized in working with heart failure patients, I had never heard of this condition. Your daughters description of increased fatigue and symptoms after her delivery raise a red flag. Fortunately her Dr. has done an echocardiogram....what were the results of that test ?
My ejection fraction was 25-30% and I was in mild congestive heart failure. It took about 6 months for my EF to come up completely, but fortunately I did experience a complete recovery. I did, however, experience recurring PSVT/AV nodal re-entry tachycardia and after receiving adenosine x 2 in an ambulance with my 3yr old daughter in my lap...I finally decided to have the EP study done and the resulting ablation. The procedure was not a big deal at all to me (keep in mind though that I've been a cardiac nurse for years, so in my twisted way I thought it was actually kind of interesting). My husband and I went to see a movie the next day and I was kept just overnight.
So bottom line....ask the cardio what her EF is. Examine her symptoms in her last month of pregnancy. Any swelling ? Eclampsia ? You might look at our website for more information but do *not* let it freak you out. Survival rates for PPCM are WAY better than they were even 10 years ago thanks to the treatment with beta blockers and ACE inhibitors. Most of us are living wonderful productive mommy lives and loving every minute.