Greetings from healthcaremagic.com
i am Dr Sourav Chakraborty and i will be helping you with your query.
I do believe you need to be serious with your symptoms. SVT
tachycardia or supra ventricular tachycardia are notoriously known to progree to frank ventricular tachycardia
during strenous periods . Proper care is out most important.
Please do take metoprolol
as prescribed by your doctor.
Regarding your query about your ski trip i strictly advocate against it , specially when you are not on any active medications, so please refrain from it.
Visit a cardioogist with your health problem , as further investigations might be needed for you, to know the type of SVT and management protocol
hope i have been able to help.