An ECG (also known as an EKG or cardiogram) is a rapid, painless test that monitors the electrical activity of your heart. Every heartbeat begins with an electrical signal. An electrocardiogram records those signals in a simple wave pattern that your doctor can read. An ECG is like taking a picture of your heart’s activity, its rate, rhythm and timing, but it may be done in a few minutes.

This page describes what an ECG test measures, why it is performed, how to prepare for it, what the results signify, and how it fits into your treatment at Zivah. And this is where it becomes shocking. In just ten seconds of recording, you can see things that you would never see in a normal pulse.

What Is an ECG (Electrocardiogram) and What Does It Measure?

Your heart runs on electricity. Each pulse is preceded by a small electrical signal that runs through the heart muscle, ordering it to contract, and our test picks up that signal. In short, the ECG is a recording of these electrical impulses laid out as a line of waves on paper or a screen.

So what does an EKG measure? Really 3 things: How fast your heart beats, whether the rhythm is regular, and how smoothly the signal moves through each chamber. Adding them together, this ECG gives your doctor a clear picture of how well the heart's electrical system is functioning.

ECG vs EKG: Same Test, Two Names

This is where people often get confused. ECG and EKG are the same test. The only difference is how it is spelt. The word "EKG" derives from the German word elektrokardiogramm, and you'll sometimes see it spelt out. Some clinics like this to prevent confusion with the medical acronym for "EEG," an examination of the brain. In any case, a cardiogram means the same thing.

What the Heart's Electrical Signals Reveal

Your doctor can learn a surprising amount by reading those signals. An ECG of the heart can show whether the heart is beating too fast or too slow, whether the rhythm is regular, and whether there are any delays or blocks in the electrical pathway. Here's what each portion of the reading means.

What an ECG Records About Your Heart

Why an ECG Test Is Done: Reasons and Symptoms

When it comes to the heart, an ECG is usually the first test a doctor will reach for, and with good reason. It’s quick, painless, and it tells them a lot in a few minutes.

You may be asked to have an ECG for a number of reasons: to investigate symptoms, to see whether you’re well enough for a procedure, to monitor a known cardiac issue or as a screening test if you’re at higher than normal risk. So, simply put, an ECG is a way to identify abnormalities with your heart’s rhythm and electrical activity before they become major problems.

Symptoms That May Call for an ECG

Certain signs are worth getting checked out, and a quick recording can demonstrate if your heart is behind them. Your doctor may prescribe an ECG if you have chest pain or other symptoms, including:

• Chest pain or pressure - Sometimes, the first clue for a heart attack is chest pain or pressure.
• ECG required Palpitations – a fluttering, racing or skipping beat, when an ECG for palpitations helps
• Shortness of breath, lightheadedness or fainting
• Unexplained fatigue or decreased exercise tolerance

These are precisely the sort of symptoms when an ECG helps to determine if your heart is the cause.

ECG for Pre-Procedure Cardiac Clearance

There’s also a quieter but no less vital job for this cardiac exam at Zivah: to ensure your heart is prepared for an operation. A pre-surgery ECG, for example, an IVF egg retrieval under sedation or a hysteroscopy, will verify you are fit for anaesthesia. As a diagnostic test, the ECG is a simple safety measure that is part of your care.

Is an ECG Safe During Pregnancy?

Yes, an electrocardiogram is very safe in pregnancy. It uses no radiation, sends no energy into your body, and it’s totally non-invasive. The test is simply listening to the electrical signals of your own heart; no signals can reach or affect your baby. An ECG in pregnancy is a common and reassuring step when a check on the heart is needed, and that’s why.

Your heart has to work harder and pump more blood than it normally does when you’re pregnant, thus it’s not unusual to have an odd flutter or racing beat. An ECG helps your doctor tell the difference between a normal change and one that warrants a deeper look.

When an ECG Is Recommended in Pregnancy

An ECG test is worth it in a few conditions in pregnancy. Your doctor may prescribe it for:

• Palpitations (racing, fluttering or missed heartbeats) during pregnancy
• Unusual shortness of breath or lightheadedness
• An established cardiac problem requiring monitoring
• When cardiac monitoring in pregnancy counts: a high-risk or pre-eclampsia workup

One essential note: this test is checking your heart, the mother’s. That’s a different scan for examining your baby’s heart, a Fetal Echocardiography. That looks at the developing heart in detail.

Types of ECG and Electrocardiogram Tests

There are several types of ECGs, since not all heart problems present in the same way. Some take a short shot, others keep records for days. Which one your doctor decides depends on whether your symptoms are consistent or irregular.

The Standard 12-Lead ECG

The 12-lead ECG is what most people think of as a normal test done at the clinic. They put ten little electrodes on your chest, arms and legs, and the ECG machine takes twelve continuous readings of your heart from different angles.

It takes only seconds to record, but a full ECG analysis takes roughly 10 minutes. It's the traditional first check, but it only catches your heart in that little window, which is where the next type comes in.

Holter and Event Monitors for Intermittent Symptoms

Some heart rhythm problems are invisible. They come and go and can be missed totally by a simple examination. That's where a Holter monitor can come in. It is a small wearable device you wear for a day or two that continuously monitors your ECG as you live your life.

Event monitors do the same thing, but over a period of weeks that you usually tell by pushing a button when you have symptoms. But even these can miss abnormalities that only appear during exercise.

Stress ECG and When a Longer Recording Is Needed

That's the role of the stress ECG. They measure your heart rate as you walk on a treadmill or pedal a bike, since some problems only show up under stress. This is especially useful for an ECG test for an irregular heartbeat with exertion, or for any heart rhythm test where symptoms occur during activity rather than at rest.

Types of ECG and When Each Is Used

How to Prepare and What the ECG Procedure Involves

One of the best things about an ECG is how little it asks of you. There's barely any preparation, nothing to fast for, and the whole thing is over in minutes. Understanding how an ECG test is done ahead of time mostly just helps you feel relaxed when you arrive; there's nothing to worry about.

How to Prepare for Your ECG

A few small steps help your ECG test preparation go smoothly and keep the reading clean:

1. Skip oily creams or lotions on test day, as they stop the electrodes from sticking properly to your skin.
2. Wear a top that's easy to remove, since electrodes go on your chest.
3. List your medications and tell your doctor what you're taking, as some can affect results.

That's really all it takes to prepare for an ECG: no special diet, no fasting, nothing complicated.

What Happens During the Test

Here's the ECG test procedure, start to finish. You'll lie down, and a technician will place small, sticky electrodes on your chest, arms, and legs, which will be connected to the ECG machine by wires. Then you simply stay still and breathe normally while it records.

Does an ECG hurt? Not at all, and the machine only listens; it never sends electricity into your body. As for how long an ECG takes, the recording itself lasts about 10 seconds, and the full visit takes about 10 minutes.

Your ECG Appointment: Step by Step

Understanding Your ECG Report and Results

When you finish, your recording is a printed or on-screen trace, your ECG report. It may look like a confusing line of squiggly lines, but to a trained doctor, those lines communicate a clear tale about your heart. The main thing to remember is that a clinician always reads your ECG findings, and they are not intended to be read out by you.

What a Normal vs Abnormal ECG Means

The normal ECG is a series of waves that repeat in a regular pattern, with equal spacing, showing your heart’s rhythm and electrical timing are working as they should. An aberrant ECG is one in which the pattern changes.

The beats may be erratic, too fast, too slow, or the signal may be moving strangely. Having an abnormal result doesn’t mean you have a diagnosis; it just means your doctor will want to take a closer look, usually with another test.

How ECG Readings Are Interpreted

So what does an ECG reading really mean? Your doctor will check the form, size, and spacing of each wave to see how the signal travels through your heart. This is intentionally kept at a high level, for a thorough, wave-by-wave explanation of how to read ECG results.

ECG Findings and What They May Indicate (Clinician-Interpreted)

An ECG is interpreted by a clinician in your full clinical context; findings alone are not a diagnosis.

What an ECG Can and Cannot Detect

An ECG is powerful, but it is not all-seeing. Knowing about the limitations of an ECG is just as helpful as recognising its capabilities. The good news is that an ECG can tell you a lot: abnormal rhythms, evidence of a present or previous heart attack, conduction difficulties and symptoms of an enlarged heart. So certainly, an ECG can often identify issues with the electrical activity of the heart.

Can an ECG Detect a Heart Attack or Blockage?

This is one of the most often asked questions, so let's clarify it. Does an ECG identify a heart attack? The changes in the ECG can tell if a heart attack is happening now or has happened in the past. This is why, in an emergency, an ECG is generally the first test done.

It can also suggest reduced blood flow; can an ECG detect heart blockage? Sometimes it can flag up signs, but confirming a blockage usually requires other tests. ECG for heart failure reveals indications, but cannot be used to diagnose heart failure alone.

When Further Heart Tests May Be Needed

That is the honest limit. An ECG records electrical activity for a short instant, not the heart's actual beat. If your symptoms are irregular, a Holter monitor may pick up what a brief test can't.

And if there is a question about the structure or pumping of the heart, an echocardiography or Doppler ultrasound shows what an ECG cannot, the Doppler Studies scan is one such next step.

ECG Testing at Zivah

An ECG test at Zivah is rapid, comfortable and actually beneficial. The unique thing about this cardiac ECG service is that the normal 12-lead recording is done directly in the clinic; it only takes a few minutes and can be easily incorporated into the care you are presently receiving.

For many patients, heart ECG testing is part of a wider picture: a safety check before a fertility procedure, or monitoring during pregnancy. Built within your care pathway, no running between clinics or repeating yourself. And you will see results quickly, one of our clinicians explained what the ECG diagnostic test showed.

Because each patient is different, prices will be discussed at your appointment. A professional compares your ECG report with your history to explain what the ECG results signify, and what happens next. A simple recording, read right, is a sure answer. Schedule your ECG with Zivah today.