An ECG (electrocardiogram) is one of the oldest and still most useful tests in medicine. In about five minutes, small electrodes on your chest, arms and legs record the electrical signals that make your heart beat — and print them as the familiar zigzag trace. But what do those waves actually tell your doctor?
Reading the rhythm of the trace
Each heartbeat on the trace has three main parts. The P wave reflects the upper chambers (atria) preparing to squeeze. The tall spike — the QRS complex — is the main pumping chambers (ventricles) firing. The T wave shows the heart electrically resetting for the next beat. Doctors measure the height, width and spacing of these waves to judge whether the electrical system is behaving normally.
What doctors look for
- Rate and rhythm — is the heartbeat regular, too fast or too slow?
- Conduction — are signals travelling through the heart without delay or block?
- Ischaemia patterns — changes that suggest reduced blood supply to heart muscle
- Chamber enlargement — thickened or stretched heart chambers
- Electrolyte and medicine effects — some drugs and imbalances change the trace
When an ECG is most useful
ECGs are most valuable for palpitations, chest discomfort, unexplained breathlessness, dizziness or fainting — and as screening for people with diabetes, high blood pressure or a family history of heart disease. Remember: a normal ECG is reassuring but never absolute. Your doctor interprets it alongside your symptoms, examination and, when needed, further tests.
At Vighnaharta Multispeciality Clinic in Pimple Saudagar, ECG is available within the clinic and reviewed by a doctor in the context of your consultation — so you leave understanding your report, not just carrying it.
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