What Is The Difference Between An Echocardiogram And A Stress Test?

 

An ECG records the heart’s electrical activity, but it cannot show everything.

If you have palpitations, breathlessness, dizziness, or suspected arrhythmia, your doctor may also recommend an echocardiogram or an exercise stress test.

These tests answer different questions.

What An Echocardiogram Shows

An echocardiogram, often called an echo, uses ultrasound to create a moving picture of the heart.

It can help assess:

  • Heart muscle strength

  • Valve function

  • Chamber size

  • Signs of heart failure

  • Structural causes of arrhythmia

This test is often used when someone has Atrial Fibrillation, breathlessness, swelling, or a suspected valve or heart muscle problem.

What A Stress Test Shows

A stress test looks at how the heart responds during exercise.

You may walk on a treadmill or use a stationary bike while your heart rhythm is monitored. This can help reveal rhythm changes, reduced blood supply, or symptoms that only appear when the heart is under strain.

Why Both May Be Needed

One test looks at the heart’s structure. The other looks at performance under pressure.

Together, they help clinicians understand whether a rhythm problem is isolated or linked with a wider heart issue.

A clear diagnosis is not only about catching the arrhythmia. It is about understanding the heart it is happening in.

If symptoms are severe, sudden, or worsening, call 999 immediately.

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