yes, I get more when I take a deep breath. Sometimes when I lay down on my back and take a deep breath I get about 5 or 6 non sustained VT's. I can actually make it happen if I take a deep breath, although not always. Don't worry
I was having thousands of PVCs per day during pregnancy, then hundreds per day after pregnancy but now I'm on a beta blocker and I only have a few per day. But when they were frequent I'd get more when I inhaled deeply (I got them other times too though). They won't do you any harm and everyone has some PVCs. I wouldn't recommend taking anything for them unless they are so frequent that they affect your quality of life.
Do you take medication for it? I thought I would wake up today and it would no longer happen. It isn't happening as often but it is occasionally.
Yes I get them when I take a sudden deep intake of breath, for example between sentences when speaking or singing. I believe that it is somehow related to sinus arrhythmia (the way that heart rate increases upon inhalation).