Hi "Mom"
As a parent, I can also relate to your concerns. I would insist that she have a cardiac workup with an electrophysiologist. These doctors are experts at diagnosing and treating rhythm disturbances.
When she wore the Holter monitor, did a cardiologist and/or EP interpret the results? Generally, a sustained VT lasts at least 30 seconds and the heartrate is at, or above 100bpm. The American Heart Assn. has a great synopsis of VT on their website. A sustained ventricular arrythmia of 18 beats may, or may not warrant treatment. Non-sustained VT is a ventricular tachycardia that lasts less than 30 seconds, and in a structurally normal heart is considered benign.
Did the doctor say why she should limit physical activity? As sueinns suggested, Long QT could be the reason. Is she taking medication? Does she have routine followups?
Momto3
Having two daughters myself, I can definitely relate to your worry.
Has your daughter been diagnosed with long QT syndrome? This is a dangerous form of ventricular arrhythmia and can be genetic. Beta blockers are sometimes prescribed and, in some cases an ICD (implanted defibrillator). Some VA's are benign so it's best to know what type she has.
Before imbarking on any kind of strenuous physical activity, she should get the go-ahead from her doctor. This will also give you peace of mind.
Bless you- what a bittersweet dilemma. But, I'm with you!(it's a mother thing!). Please, however, have a full cardiac workup done once again to see what her condition presently is. Will she agree to this??? Thinking of you,
Amy