Five Early Warning Signs of Heart Disease

Most people picture a heart attack the way films show it: a sudden clutch at the chest, a collapse, an ambulance. In clinic, the story is almost never that dramatic. It is a man who stopped taking the stairs because of the third-floor landing, or a woman who blamed six months of exhaustion on a stressful job. The signs were there. They were just quiet.

Below are the five patterns that make a cardiologist look more closely — and what we do about each one.

1. Breathlessness That Has Crept Up on You

Fitness declines slowly, so a gradual reduction in what you can manage is easy to explain away. The question worth asking is not “am I breathless?” but “could I do this a year ago?” If carrying shopping up one flight now needs a pause and it did not last summer, that change is worth investigating — particularly if it comes with ankle swelling by evening.

2. Chest Discomfort That Is Predictable

Classic angina is not a stabbing pain. Patients describe pressure, heaviness or tightness — often placing a flat palm over the sternum rather than pointing with a finger. The critical detail is the pattern: it comes on with exertion or cold weather, and it goes with rest. Predictability is a clue, not a reassurance.

Most heart disease is not discovered on the day it becomes dangerous. It is discovered on an ordinary Tuesday, in a clinic, by someone who took the time to ask the right question.

3. Pain That Is Not in the Chest at All

Cardiac pain refers. It can present in the jaw, the throat, the left arm, between the shoulder blades or as upper-abdominal discomfort mistaken for indigestion. Women, people with diabetes and older patients are more likely to present this way, which is part of why their diagnosis is more often delayed.

Symptoms we ask about specifically

• Discomfort brought on by effort and relieved within minutes of rest
• Waking at night short of breath, or needing extra pillows to sleep flat
• Palpitations lasting more than a few minutes, especially with dizziness
• Swelling of both ankles that worsens through the day
• Fainting during exertion — this one always needs same-week assessment

4. A Fluttering or Racing Heartbeat

Occasional skipped beats are common and usually harmless. What concerns us is an irregular rhythm that runs for minutes or hours, particularly when it comes with light-headedness. Atrial fibrillation raises stroke risk substantially and is straightforward to detect — often with a single ECG, sometimes with a wearable monitor for a few days.

5. Fatigue That Rest Does Not Fix

Tiredness is the least specific symptom in medicine, which is exactly why it gets dismissed. The version that matters is disproportionate: sleeping well, no new stress, but a flight of stairs or a supermarket trip now costs the whole afternoon. In heart failure the heart cannot raise its output to meet demand, and this is often how that first shows.

What an Assessment Actually Involves

A first cardiology visit is less intimidating than most people expect. We take a detailed history — which is where the diagnosis usually comes from — then an examination, an ECG and blood tests. Depending on what those show, we may add an echocardiogram, an exercise test or a CT coronary angiogram. In our department, all of those run on site, and results are explained the same day wherever possible.

If nothing is found, that is a useful result too: you get a documented baseline, a risk score and a plan for when to come back.

Dr. Alan Reeves

Consultant Cardiologist · Chief Medical Officer

Twenty-two years in interventional cardiology, and the person who built our 24/7 angioplasty rota. He writes here monthly on prevention and heart-health screening.

Comments (3)

Marcus Bell

14 August 2026 at 09:24

Point three is exactly what happened to me — I spent two weeks treating jaw pain as a dental problem. Wish I had read this sooner.

Reply →

Dr. Alan Reeves

14 August 2026 at 11:02

Thank you for sharing that, Marcus — referred pain is under-recognised, and stories like yours do more to change behaviour than any leaflet.

Reply →

Priya Raman

15 August 2026 at 18:40

Is there an age at which routine cardiac screening is worth doing even with no symptoms? My father had a bypass at 54.

Reply →