>- her heart rate still gets up high and takes a long time to get back to a normal rate
It sounds like her cardiac output is not very good or that she has arterial problems. Have a complete cardiac evaluation including ultrasound measurements of the carotid artery. It could also be a problem with leaking or damaged valves.
While women do often have higher hiqher heart rates than men, a heart rate of 200 would cause me concern.