is a heart murmur dangerous?

Answer 1

Depends, there are 2 types of murmur.
PHYSIOLOGICAL: e.g. in anemia, correct anemia, it is gone for good.
PATHOLOGICAL: This is due to an underlying pathology of heart valves, e.g. Mitral, Aortic and so on, or TOF.
However most of the murmers are harmless and they go away with time.
When in doubt contact your cardiologist.

Answer 2

Heart Murmurs are not dangerous -

A normal heartbeat makes two sounds like "lub-DUB," which are the sounds of your heart valves closing. Heart murmurs are abnormal sounds during your heartbeat — such as whooshing or swishing — made by turbulent blood in or near your heart.

Heart murmurs can be present at birth (congenital) or develop later in life. A heart murmur isn't a disease — but murmurs may indicate an underlying heart problem.

Most heart murmurs are harmless and don't need treatment. Doctors call these functional or "innocent" murmurs. A person with an innocent murmur has a normal heart. This type of heart murmur is common in newborns and children. More than half of all children have heart murmurs at some time, and most of those murmurs are innocent.

An abnormal heart murmur is more serious. In children, abnormal murmurs are usually the result of congenital heart disease. In adults, abnormal murmurs are most often due to acquired heart valve problems.

A doctor can evaluate heart sounds by listening to your heart with a stethoscope — and sometimes will have you undergo other tests to help determine the cause. Treatment, if needed, is directed at the underlying cause of your heart murmurs.-

Answer 3

A heart murmur is not a disease; it is a sound that the doctor hears with a stethoscope. It may be normal, or it could be a sign that something may be wrong. Most heart murmurs are harmless. Some are signs of heart problems, especially if other signs or symptoms of a heart problem are present.
Types of Murmurs
Innocent (harmless) murmurs
A person with an innocent murmur has a normal heart and usually has no other signs or symptoms of a heart problem. Innocent murmurs are common in healthy children.
Abnormal murmurs
A person with an abnormal murmur usually has other signs or symptoms of a heart problem. Most abnormal murmurs in children are due to congenital heart defects—heart defects present at birth. In adults, abnormal murmurs are most often due to heart valve problems caused by infection, disease, or aging.