Overview
Understanding Hypertension
Dr Imtiaz Kalyar, Consultant Interventional Cardiologist at Naas Cardiology & Endocrinology Clinic in Naas, Co. Kildare (IMC 102093), provides specialist assessment and treatment of this condition. Appointments are available on Saturdays and Sundays at Suite 5, Vista Primary Care Clinic, Ballymore Road, Naas. To book, call 089 656 7597.
Hypertension — persistently elevated blood pressure — is one of the most significant modifiable risk factors for cardiovascular disease, stroke and chronic kidney disease. Despite its prevalence, hypertension is frequently undertreated, partly because it causes no symptoms until complications arise, earning it the name "the silent killer."
Blood pressure is classified by guidelines into stages. Stage 1 hypertension is typically defined as sustained readings of 140–159 mmHg systolic or 90–99 mmHg diastolic. Stage 2 hypertension refers to readings consistently at or above 160/100 mmHg. Hypertensive urgency and emergency involve very high readings with associated symptoms or end-organ damage and require immediate medical attention.
The majority of cases represent essential (primary) hypertension — elevated blood pressure without an identifiable secondary cause. However, in a meaningful proportion of patients, particularly younger individuals and those with resistant hypertension, a secondary cause such as renal artery stenosis, primary hyperaldosteronism or sleep apnoea may be present and is treatable.
Blood Pressure Classification
The following thresholds are used to classify blood pressure in adults according to current European (ESH/ESC) and international guidelines:
Blood Pressure Categories — Adults (ESH/ESC 2023 Guidelines)
| Category |
Systolic (mmHg) |
Diastolic (mmHg) |
Clinical Action |
| Optimal |
< 120 |
< 80 |
No intervention; maintain healthy lifestyle |
| Normal |
120–129 |
80–84 |
Lifestyle advice; annual monitoring |
| High Normal |
130–139 |
85–89 |
Lifestyle modification; monitor closely |
| Stage 1 Hypertension |
140–159 |
90–99 |
Confirm with ABPM; consider medication if CV risk elevated |
| Stage 2 Hypertension |
160–179 |
100–109 |
Antihypertensive treatment recommended |
| Stage 3 Hypertension |
≥ 180 |
≥ 110 |
Immediate treatment; rule out secondary cause |
| Hypertensive Emergency |
> 180 |
> 120 |
Attend Emergency Department immediately; call 999 |
This page is for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional for diagnosis and treatment. In a medical emergency, call 999 or 112.