What does hypertension attack in the body?

Heart, brain, +more. Hypertension, or high blood pressure, causes damage to many organs in the body. It can damage the heart by causing a heart attack or heart failure. It can also attack the brain by causing stroke. It can damage the kidneys, leading to renal failure. Finally, it can damage the eyes and cause blindness. For this reason, anyone with hypertension should visit a doctor so it can be properly treated.
Vessel damage. The organs damaged by HTN are the heart (congestive heart failure and heart attacks), brain (strokes), and the kidneys (kidney failure).