Hi Dan,
My daughter, Chelsea, didn't have high blood pressure but developed 'sinnus tachycardia' (sp) and her heart rate was in the 140's-150's after her surgeries. She was checked over by the cardio team at UCLA and they put her on a low-pressure drug called Metropolol. This is usually for high blood pressure. Problem was that it caused her blood pressure to get too low so she only took it if her heart rate was up and blood pressure was over 100/65. The cardio doctor said that the Vagus nerve can be effected by the tumor and cause a host of problems including cardio. He sad that eventually things will settle down and in most cases come back to normal. She is doing really well now and although her heart rate will jump up once in a while, she hasn't taken any Metropolol in months. I hope your BP comes back to normal soon. What do the doctors say about the rise in pressure since the surgery?
Michelle