Not sure why no body has jumped here but I will answer your question:
Poor glucose management and hypertension are linked as part of metabolic syndrome.
When the kidneys retain too much fluid in repsonse to a high carb diet this causers high blood pressure.
Often when people eat less carbohydrate they find their blood pressure drops which is why it ts advisable to check with our doctor re medications for hypertension before staring a new dietary regaime And to eat a little salt to help retain fluid as your body adjusts in the first few weeks of said diet.