An unsafe diastolic blood pressure reading is generally considered to be over 100 mmHg. This elevated diastolic pressure can indicate diastolic hypertension, a condition requiring medical attention.
Understanding Diastolic Blood Pressure
Diastolic blood pressure is the lower number in a blood pressure reading. It represents the pressure in your arteries when your heart rests between beats. A normal diastolic pressure falls between 60 and 80 mmHg for adults.
Diastolic Hypertension
Diastolic hypertension (DHT) is defined by a consistently elevated diastolic pressure, typically exceeding 90 mmHg. However, values above 100 mmHg are often considered particularly unsafe due to the significantly increased risk of cardiovascular complications.
Blood Pressure Categories (According to the American Heart Association)
| Category | Systolic (mmHg) | Diastolic (mmHg) |
|---|---|---|
| Normal | Less than 120 | Less than 80 |
| Elevated | 120-129 | Less than 80 |
| Hypertension Stage 1 | 130-139 | 80-89 |
| Hypertension Stage 2 | 140 or higher | 90 or higher |
| Hypertensive Crisis | Higher than 180 | Higher than 120 |
Important Note: This table presents general guidelines. Individual blood pressure targets can vary based on age, health conditions, and other factors.
Risks Associated with Elevated Diastolic Pressure
Consistently high diastolic blood pressure puts extra strain on your heart and blood vessels, increasing the risk of:
- Heart disease: Including heart failure and coronary artery disease.
- Stroke: Damage to the brain caused by interrupted blood flow.
- Kidney disease: Damage to the blood vessels in the kidneys.
- Vision loss: Damage to the blood vessels in the eyes.
- Peripheral artery disease: Narrowing of the arteries in the limbs.
What to Do If You Have a High Diastolic Reading
If you consistently have diastolic blood pressure readings above 80 mmHg, especially those above 90 mmHg or 100 mmHg, consult a healthcare professional. They can accurately assess your blood pressure, identify any underlying causes, and recommend appropriate lifestyle changes or medical treatments. These may include:
- Lifestyle Modifications: Diet changes (low sodium, DASH diet), regular exercise, weight management, stress reduction, and limiting alcohol consumption.
- Medications: Antihypertensive medications may be prescribed if lifestyle changes are insufficient to control blood pressure.
