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It won't. But in the long term the murmur (depending on which valve is affected) will cause hypertrophy of cardiac muscles for the different ventricles/atria. And the hypertrophy will be detected by the ECG because it will change the cardiac axis. Murmurs are easily heard using a stethoscope so and ECG isn't useful. An ECG monitors the electric impulses of the heart muscle - so better to see heart blocks, infarcts, hypertrophy, AF, SVT etc

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Q: How can a heart murmur affect an ECG?
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Related questions

What would cause you to believe that someone has a heart murmur?

irregular ecg


A friend tells you that her son had an ECG and it revealed that he has a slight heart murmur Should you be convinced that he has a heart murmur?

When doctors hear a murmur that might be abnormal, they order tests, such as: * Chest x ray. A chest x ray takes a picture of your heart and lungs. It can show if the heart is enlarged, and it can show some problems of the heart and lungs. * EKG or ECG (electrocardiogram). This test is used to measure the rate and regularity of your heartbeat. The EKG can help rule out a variety of heart problems.


What disease would affect an ECG?

heart disease


How is a heart murmur detected?

A simple way for a heart murmur to be detected is by having a doctor listen to your heart using a stethoscope. If they are concerned about it, there are many diagnostic tests that can be used. These include chest X-ray, ECG, CT, MRI or Echocardiogram


How often does the baby see the cardiologist with a innocent heart murmur?

innocent heart murmurs do not affect you


What is the treatment for a heart murmur?

what is the treatment for a heart murmur


Can you take ecstasy with a heart murmur?

Yes! Cocaine has a direct affect on the walls of the heart and restriction of blood flow.


What tests are done when a heart murmur sounds suspicious?

chest x ray, an electrocardiogram, and an echocardiogram. An electrocardiogram (ECG) shows the heart's activity and may reveal muscle thickening, damage, or a lack of oxygen


What is the duration of Murmur of the Heart?

The duration of Murmur of the Heart is 1.97 hours.


An abnormal heart sound?

Murmur


When was Murmur of the Heart created?

Murmur of the Heart was created on 1971-04-28.


Does a heart murmur affect heart rate?

Depending if it is a systolic or diastolic murmer, it could effect your heart rate do to lack of o2 throughout the heart and body.