Can Polycythemia Vera cause increased Heart Rate and high blood pressure?

Yes, possibly. Your doctor who diagnosed your P. Vera is your best source of advice for questions like this . Yes BP can go higher due to high Hemoglobin(Hb) level. Heart rate can fluctuate (go up and down) with so many reasons especially any emotional disturbance and increased physical activity can increase the heart rate. How high are your values of BP and Heart rate? Check them again when you are resting.
It can cause. hypertension. I hope this helps. Do you still have more questions or concern about this issue ? To schedule a virtual appointment (Video Consultation if it is your first time) go to www.healthtap.com/dryetimyan.