My daughter had an echocardiogram done due to a resting heart rate of 35 while in the hospital for mono. The cardiologist said her heart looked good and responded well to getting up and moving around - but while they did the echo they found moderate pressure on her lung. They said this may be a false reading and tomorrow they are doing a right heart cath. Is this warranted. She jogs a lot and lifts weights and is not out of breath at all.