When do I need an ECG? A practical guide for Kenyans
How to tell whether your symptoms warrant an ECG, what the test measures, and when a mobile ECG at home is the right call.
An electrocardiogram (ECG) is one of the fastest, safest, and most informative tests in medicine. It takes about five minutes, it's painless, and it can flag silent heart problems long before they become emergencies.
What an ECG actually measures
An ECG records the electrical signals that trigger each heartbeat. By looking at the pattern, rhythm, and timing of those signals, a clinician can detect arrhythmias, thickening of the heart muscle, past heart attacks, electrolyte imbalances, and early signs of ischemia (reduced blood flow to the heart).
Six situations that usually call for an ECG
- Chest pain, tightness, or pressure that lasts more than a few minutes.
- Palpitations — the feeling that your heart is racing, skipping, or fluttering.
- Unexplained shortness of breath, especially on exertion.
- Dizziness, lightheadedness, or fainting episodes.
- Before starting a demanding new exercise routine if you're over 40 or have a family history of heart disease.
- As part of a routine check-up if you have hypertension, diabetes, or high cholesterol.
Why mobile ECG is a game-changer
A conventional ECG often means a trip to a hospital, a long queue, and a same-day appointment that's hard to keep when you're unwell. A mobile ECG means a licensed technician arrives at your home or office with portable equipment, runs the test in the room you're most comfortable in, and sends the tracing straight to a cardiologist for interpretation.
For elderly patients, people with limited mobility, or anyone who is genuinely anxious about hospital visits, this removes every friction point between a symptom and a diagnosis.
What happens after the test
Your ECG reading is typically reviewed within 24 hours. If everything looks normal, you'll receive a clean report. If the reading shows anything concerning — an irregular rhythm, ischemic changes, or structural signs — you'll be advised to see a cardiologist for follow-up tests like an echocardiogram or a stress ECG.
When to skip the ECG and go straight to hospital
If you're experiencing crushing chest pain, pain radiating down the left arm or into the jaw, profuse sweating, or shortness of breath at rest — call emergency services immediately. Don't wait for a home test.