welcome to HCM ,
PVCs can cause above symptoms , not all PVCs are harmful ,
many normal people also has episodes of PVCs,
medicine which you are taking at present is best please continue it ,
i would like to suggest few tips which you can adopt to decrease frequency of PVCs .
Quit any form of Tobacco if you are using. no alcohol intake.
Say ‘No’ to all forms of addiction,
do regular exercise ,
avoid coffee , tea , caffeine , chocolate ,
stay relax ,
Do stress relaxation techniques