High Diastolic Blood Pressure: Causes of Elevated Diastolic Pressure

Blood pressure is recorded as two numbers: the upper (systolic) and the lower (diastolic). If the lower number is consistently above normal, this may indicate elevated diastolic blood pressure — a condition that requires attention. Let us explain what this indicator means, why it rises, and in which cases you should consult a doctor.

What the lower (diastolic) pressure is and what the norm is

Diastolic pressure is the force of blood pressing against the artery walls at the moment the heart relaxes between beats. The upper number reflects the pressure at the moment the heart contracts (systolic). Normal blood pressure values: systolic less than 120 mmHg and diastolic less than 80 mmHg. Elevated blood pressure is considered to be 120–129 (systolic) with diastolic less than 80 — this is "elevated" blood pressure. Stage 1 arterial hypertension is diagnosed at systolic 130–139 or diastolic 80–89 mmHg; stage 2 — at systolic 140 and above or diastolic 90 and above. Hypertensive crisis — pressure above 180/120 mmHg. An accurate diagnosis is made based on several measurements taken at different times.

High lower pressure: what it means

If diastolic pressure is elevated in isolation (for example, 90 mmHg and above with systolic below 140), this is referred to as high lower pressure. This means that pressure is elevated at the moment the heart relaxes between beats. This condition may be a variant of arterial hypertension and requires clarification of the causes.

Causes of elevated diastolic blood pressure

The causes of high lower pressure are diverse. The main risk factors for arterial hypertension: age (risk increases with years), heredity (close relatives with hypertension), unhealthy diet with excess salt, excess body weight, smoking, excessive alcohol consumption, prolonged stress. In women, the use of hormonal contraceptives may contribute to increased pressure, especially with obesity, smoking, and at an older age. Secondary hypertensions are caused by another disease or by the intake of certain substances and medications. An increase in diastolic pressure may be a consequence of these conditions.

When only the lower pressure is elevated

For diagnosis, an elevation of one of the numbers is sufficient: lower 80–89 — stage 1, 90 and above — stage 2. The diagnosis is established based on repeated measurements and, if necessary, 24-hour blood pressure monitoring.

Why prolonged elevation of lower pressure is dangerous

Persistent elevation of blood pressure, including diastolic, creates additional strain on the heart and blood vessels. Over time, this can lead to damage to target organs: the heart, brain, kidneys, and eyes. The risk of myocardial infarction, stroke, heart failure, renal failure, and vascular dementia increases. Even a small reduction in pressure decreases the likelihood of these complications.

How the cause is determined and when to consult a doctor

To determine the cause of elevated diastolic blood pressure, the doctor measures blood pressure and may prescribe home monitoring or 24-hour ambulatory blood pressure monitoring. To rule out secondary hypertensions, blood tests are performed (for example, for aldosterone, renin). You should consult a doctor if you have detected a persistent increase in pressure, especially if it is accompanied by headaches, chest pain that comes and goes, or deterioration of vision. At a pressure above 180/120 mmHg, emergency medical care is required.

Elevated lower pressure by itself is not a reason to call an ambulance. Call 103 or 112 if, against a background of high pressure, sudden pressing chest pain occurs that radiates to the arm, neck, jaw, back, or abdomen, shortness of breath, cold sweat, nausea, or lightheadedness appear, as well as at a pressure above 180/120 mmHg with these symptoms.

• High lower pressure — diastolic blood pressure of 90 mmHg and above.
• The norm of diastolic pressure — less than 80 mmHg.
• Main risk factors: age, heredity, excess salt, smoking, alcohol, stress.
• Secondary hypertensions are caused by another disease or by the intake of certain substances and medications.
• Prolonged elevation of pressure is dangerous for the heart, brain, kidneys, and eyes.

This material is for reference purposes and does not replace consultation with a doctor. Only a specialist can make a diagnosis and prescribe treatment.

This content is for reference and does not replace a doctor's consultation. Medical disclaimer