I'm not knowledgable about this condition, nor is anyone on this board (except for Cy Willson or someone similar). So, the best bet is going to be to consult with your doctor about the general health of your heart and kidneys.
That said, I'd expect hydration to be crucial for you. Especially with a higher protein intake, you want to give your kidneys all the water they need, and then some. I'm talking a gallon a day minimum, no exceptions.
Also, for Hypertension (high blood pressure) in general, monitoring your dietary sodium is crucial. Shoot for 1,500 to 2,000 mg. per day at most. Hope that helped some.