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What are Heart Murmurs ?

Heart Murmurs


The human heart is an astonishing organ, tirelessly pumping blood throughout the body, providing vital oxygen and nutrients to every cell. In its rhythmic dance, we find the symphony of life. However, this symphony can sometimes be disrupted by a condition known as heart murmurs. Heart murmurs are abnormal sounds produced by the turbulent flow of blood within the heart or major blood vessels. They can vary in intensity, duration, and pitch, and their presence can signal a range of underlying cardiac conditions. This essay delves into the intricacies of heart murmurs, their causes, types, diagnosis, and treatment options.

Causes of Heart Murmurs

Heart murmurs can result from various underlying conditions, which can be broadly categorized into two groups: innocent (benign) murmurs and pathological murmurs.

Innocent Murmurs: Innocent murmurs are typically harmless and are often heard in individuals without any underlying heart problems. They can occur due to increased blood flow during exercise, fever, anemia, or during pregnancy. These murmurs are usually soft and have no clinical significance. They tend to disappear as the underlying condition resolves or with age.

Pathological Murmurs: Pathological murmurs are associated with structural or functional abnormalities within the heart or blood vessels. Some common causes include:

a. Valvular Disorders: Heart valves play a crucial role in maintaining proper blood flow through the heart. Conditions like valve stenosis (narrowing), regurgitation (leaking), or prolapse can lead to turbulent blood flow, causing murmurs.

b. Congenital Heart Defects: Some individuals are born with structural abnormalities in their heart, such as atrial or ventricular septal defects (holes in the heart walls) or bicuspid aortic valves, which can lead to murmurs.

c. Cardiomyopathy: Conditions like hypertrophic cardiomyopathy, where the heart muscle thickens abnormally, can disrupt blood flow and create murmurs.

d. Rheumatic Fever: A complication of untreated strep throat, rheumatic fever can damage heart valves and lead to murmurs.

e. Endocarditis: Infections of the heart lining (endocardium) can cause damage to heart valves, leading to murmurs.

Types of Heart Murmurs

Heart murmurs are classified based on their timing within the cardiac cycle and their location. The two primary categories are:

Systolic Murmurs: These murmurs occur between the "lub" and "dub" of the heartbeat and are often associated with ventricular contraction. They can be due to conditions like aortic stenosis, mitral regurgitation, or ventricular septal defects.

Diastolic Murmurs: These murmurs occur between the "dub" and "lub" of the heartbeat and are typically associated with ventricular relaxation. Conditions causing diastolic murmurs include aortic regurgitation, mitral stenosis, and pulmonary regurgitation.

Diagnosis of Heart Murmurs

The diagnosis of a heart murmur involves a comprehensive evaluation by a healthcare provider. Key diagnostic tools include:

Auscultation: The first step in diagnosing a heart murmur is listening to the heart sounds using a stethoscope. The healthcare provider can identify the timing, intensity, and location of the murmur.

Echocardiography: An echocardiogram is an ultrasound of the heart that provides detailed images of the heart's structures and blood flow, helping to determine the cause and severity of the murmur.

Electrocardiogram (ECG or EKG): An ECG records the electrical activity of the heart and can detect rhythm abnormalities or signs of cardiac damage.

Chest X-ray: A chest X-ray can reveal the size and shape of the heart, as well as any signs of heart failure.

Cardiac Catheterization: In some cases, a cardiac catheterization may be performed to obtain direct measurements of pressures and blood flow within the heart.

Treatment of Heart Murmurs

The treatment of heart murmurs depends on their underlying cause and whether they are benign or pathological.

Innocent Murmurs: Innocent murmurs usually require no treatment, as they are not associated with any structural abnormalities or cardiac dysfunction. However, addressing the underlying condition, such as fever or anemia, may resolve them.

Pathological Murmurs: Treatment for pathological murmurs varies based on the specific condition. It may include medication to manage symptoms or reduce the workload on the heart, lifestyle changes, or surgical interventions to repair or replace damaged heart valves.


Heart murmurs are intriguing and often perplexing phenomena of the cardiovascular system. While some murmurs are harmless and benign, others can be indicative of serious underlying cardiac conditions. Early detection and accurate diagnosis are crucial for determining the appropriate course of action. Thanks to advancements in medical technology and the expertise of healthcare providers, individuals with heart murmurs can receive timely and effective treatment, allowing them to continue the symphony of life with a healthy and harmonious heart.

Book your appointment with Dr Bakshi, one of the top paediatricians in London and Birmingham, head to Well Kid Clinic, the best private children's clinic that provides comprehensive care and treatment for all your allergies.

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