My Husband Has Ongoing High Blood Pressure, Usually Between 140

My husband has ongoing high blood pressure, usually between 140 and 158 over 75 to 90. He also has a really slow heartbeat, between 48 and 55. Lately, he's been getting sudden episodes of blurred vision and dizziness which last a couple of minutes. These happen once every 4 or 5 days, for the past couple of months. He is 63 years old. Average weight. Not diabetic. Not super fit, but not sedentary either. What do you think is going on?