Pulmonary Embolism Support Group
By far the most common form of pulmonary embolism is a thromboembolism, which occurs when a blood clot, generally a venous thrombus, becomes dislodged from its site of formation and embolizes to the arterial blood supply of one of the lungs. Symptoms may include difficulty breathing, pain during breathing, and more rarely circulatory instability and death.
As far as recovery, it takes time and patience. It can really frustrating at times. I didn't have my PEs till I was 61. They were bilateral with infarctions in both lungs. I also was diagnosed with pnuemonia, and right heart strain. It really helped reading other people's advice and experiences on this board. It gave me hope. Many people said that it took about six months before they seemed like their old selves , and that turned out to be true for me.The improvement was gradual, but there was improvement, and that kept me sane and hopeful. Now, at a year out, my exercise tolerance is pretty much back to normal. The only thing that I've noticed is that I don't tolerate heat and humidity as well as I did before.
The other thing many mention on this board is getting some kind of counseling. The PE experience is so frightening and mind blowing.
Counselling and/or anxiety meds can be a huge help.
I wish you and your daughter the best.
Serena Williams had PEs and she came back from that so I think that's a good indication of the possibilities.
http://clot-buster-triathlete.blogspot.co.uk/
Some top athletes Chris Horner, Serena Williams, ... have maintained/improved their fitness and there's no reason to think otherwise for your daughter. It sounds like the dehydration/journey are the provoking factors?
I'm presuming this happened fairly recently? General advice is to take things easy and not rush back into exercise. See how it goes and be aware that the effects / fatigue can last for several months.
Many athletes have dealt with blood clots and come back to be just as good (or better!) than before. Serena Williams is a great example of this.
Still, it can be very frustrating to be in great condition one week and then feel short of breath (SOB) and exhausted all the time the next week. She will improve and get better but I can guarantee that it won't be as fast as you (or she) want it to be... that's pretty standard for all of us. She needs to be very good about listening to her body right now. If she's tired, she should sleep. If she goes out for a walk or jog and winds up really SOB and exhausted, she'll need to dial it back a little.
Many athletes are taught to just "push through it" and that really isn't good advice when recovering from PEs. Trying to just "push through it" can make symptoms much worse for a few days, although I don't know that it'll cause any permanent damage. It's better to push a little, see if your body pushes back, and then try a little more next time around. It can be frustrating for everyone for a while, but eventually she'll be able to look back and see how far she's come
Best of luck to you both!