Hello there, Welcoming to healthcare and thankyou for trusting us. Your dizziness can be due to brain and cardiac diseases caused by high blood pressure.By this i mean,HBP can damage arteries throughout the body. Weakened arteries in the brain put you at much higher risk for stroke.igh blood pressure brings on heart failure by causing left ventricular hypertophy, a thickening of the heart muscle that results in less effective muscle relaxation between heart beats.These are the symptoms; Shortness of breath Swelling in the feet, ankles, or abdomen Difficulty sleeping flat in bed Bloating Irregular pulse Nausea Fatigue Greater need to urinate at night. So i would suggest you to go for an electrocardiogram,echocardiography and CT brain to get a confirmed diagnosis and get treated accordingly. Hope i cleared your doubt.