Most heart murmurs don’t feel like anything at all. A heart murmur is a sound, not a sensation. It’s an extra whooshing noise created by turbulent blood flow through the heart, and it’s typically discovered by a doctor listening with a stethoscope during a routine exam. The majority of people with a heart murmur have no idea they have one until someone tells them.
That said, if you’re searching this question, you’re probably experiencing something in your chest and wondering if a heart murmur is behind it. The short answer: the sensations people associate with a heart murmur, like fluttering, pounding, or chest tightness, usually come from the underlying condition causing the murmur, not from the murmur itself.
Why You Can’t Usually Feel a Murmur
A heart murmur is turbulent blood flow. When blood moves smoothly through your heart valves, it’s silent. When something disrupts that flow, like a narrowed or leaky valve, the blood swirls and creates a whooshing sound layered on top of the normal heartbeat. Your doctor hears this through a stethoscope, but you don’t feel turbulence the way you’d feel your heart pounding after a sprint.
There is one exception. Very loud murmurs, graded 4 through 6 on a 6-point scale doctors use, can produce a vibration on the chest wall called a “thrill.” This feels like a faint buzzing or humming under the skin if you press your hand over the right spot on your chest. A grade 6 murmur is so loud it can actually be heard without a stethoscope. These intense murmurs are uncommon and almost always indicate a significant structural heart problem.
What People Actually Feel
When a heart murmur does come with noticeable symptoms, those symptoms are caused by whatever is making the blood flow abnormally. A stiff, narrowed valve forces the heart to work harder. A leaky valve lets blood flow backward, reducing efficiency. Over time, these problems can produce real, physical sensations.
The most commonly reported feelings include:
- Palpitations: a fluttering, skipping, or pounding sensation in your chest, throat, or neck. This is the symptom people most often confuse with “feeling” a murmur. Palpitations are actually a separate issue, often related to an irregular heart rhythm rather than the murmur itself.
- Shortness of breath: especially during physical activity or when lying flat.
- Fatigue: feeling unusually tired with normal activities because the heart isn’t pumping blood efficiently.
- Dizziness or lightheadedness: particularly when standing up quickly or during exertion.
- Chest discomfort: a vague pressure or tightness, different from the sharp pain of a heart attack.
- Swelling: in the ankles, feet, or abdomen, which signals the heart is struggling to keep up with the body’s demands.
If you have an innocent (harmless) murmur, you won’t feel any of these things. Innocent murmurs simply reflect faster-than-usual blood flow through normal, healthy valves. They’re especially common in children, pregnant women, and people with anemia or fever. Once the temporary condition resolves, the murmur often disappears entirely.
Palpitations vs. Heart Murmurs
These two things get mixed up constantly, so it’s worth being clear about the difference. A heart murmur is a sound caused by disrupted blood flow through the valves. A palpitation is a feeling caused by a disruption in the electrical signals that control your heart’s rhythm. You can have one without the other, or both at the same time.
Palpitations feel like your heart is racing, fluttering, or skipping beats. You notice them in your chest, and sometimes in your throat or neck. They’re the sensation most people are actually describing when they say they “feel” a heart murmur. If you’re lying in bed at night and feel your heart doing something unusual, that’s almost certainly a rhythm issue, not a valve issue. Both are worth mentioning to your doctor, but they point to different things.
What Causes a Murmur to Become Noticeable
Innocent murmurs need no treatment and cause no symptoms. The murmurs that eventually produce symptoms are the ones tied to structural heart problems.
In adults, the most common culprit is valve disease that develops over time. As you age, calcium deposits can build up on heart valves, making them stiff and narrow or preventing them from closing completely. When a valve narrows, the heart has to push blood through a smaller opening, which creates turbulence. When a valve doesn’t close properly, blood leaks backward, and the heart has to pump harder to compensate. Either scenario creates both the sound your doctor hears and the symptoms you eventually feel.
Other causes include infections that damage the heart’s inner lining and valves, past episodes of rheumatic fever from untreated strep throat, and congenital heart defects like holes between the heart’s chambers. Conditions outside the heart can also trigger murmurs: anemia (too few red blood cells), an overactive thyroid, high blood pressure in the lungs, and autoimmune diseases like lupus.
What Your Doctor Hears
Understanding what the doctor is actually listening for can help make sense of your diagnosis. A normal heartbeat has two sounds, often described as “lub-dub.” The first sound happens when the valves between the upper and lower chambers close. The second happens when the valves leading out of the heart close. A murmur is an extra whooshing sound that occurs between those beats.
If the whoosh happens between the first and second sound (during the squeeze phase, when the heart pushes blood out), it’s called a systolic murmur. This can mean a valve leading out of the heart is too narrow, or a valve between the chambers is leaking. If the whoosh happens between the second and first sound (during the filling phase, when the heart relaxes), it’s a diastolic murmur, which can indicate the opposite set of valve problems. Diastolic murmurs are less common and more likely to signal something that needs attention.
Doctors grade murmurs on a scale from 1 to 6. Grade 1 is barely audible. Grade 2 is faint but easy to hear. Grade 3 is loud but produces no vibration you could feel on the chest wall. Grade 4 and above produce that palpable thrill, a vibration a doctor can feel with their hand on your chest. Grade 6 is audible without a stethoscope. A higher grade doesn’t automatically mean a more dangerous condition, but it does prompt more thorough evaluation.
Living With a Heart Murmur
If your murmur is innocent, there are no restrictions on your life. You can exercise, travel, and do everything you’d normally do. Many people live their entire lives with an innocent murmur and never know it’s there.
If your murmur is caused by a valve problem, daily life depends on how severe the underlying condition is. Mild valve disease often requires nothing more than periodic monitoring, typically an ultrasound of the heart every year or two to track whether the problem is stable or progressing. You might notice no symptoms at all for years or even decades.
Moderate to severe valve disease is where symptoms start to affect your routine. You may notice that activities that used to be easy, like climbing stairs or walking briskly, now leave you winded or fatigued. Swelling in the legs or sudden weight gain from fluid retention can develop as the heart loses efficiency. At this stage, treatment may involve medications to reduce the heart’s workload, or eventually valve repair or replacement.
The symptoms to take seriously are the ones that come on suddenly or severely: fainting or near-fainting, chest pain during exertion, or rapid and worsening shortness of breath. These suggest the heart is under significant strain and the underlying condition needs prompt evaluation.