Heart Palpitations When Breathing In: Why Do I Feel My Heartbeat With a Deep Breath?
Some people notice their heartbeat more strongly when taking a deep breath, sighing or yawning. They may feel a brief increase in heart rate, a thump, flutter or what seems like a skipped or extra beat.
Breathing naturally influences heart rate. In many healthy people, the heart beats slightly faster during inhalation and slightly slower during exhalation. This normal pattern is called respiratory sinus arrhythmia.
Why Do I Feel Palpitations When I Breathe In?
- Your heart rate normally changes slightly with breathing. It tends to speed up during inhalation and slow during exhalation.
- This normal pattern is called respiratory sinus arrhythmia and is usually harmless.
- A deep breath may make you more aware of your heartbeat, particularly if you are resting or paying close attention to your chest.
- A PAC or PVC may feel like a skipped beat, extra beat, pause or strong thump and may happen to be noticed during a breath.
- Anxiety and changes in breathing can also increase heartbeat awareness.
- Breathing in does not normally make your heart “stop for a second.”
- Repeated, prolonged, very fast or clearly irregular palpitations may need an ECG or heart-rhythm monitor.
- Seek urgent care if palpitations occur with chest pain, fainting, severe shortness of breath or severe dizziness.
Your Heart Rate Normally Changes as You Breathe
The heart and lungs continuously interact. Breathing changes pressure inside the chest and influences autonomic nervous-system activity.
In many healthy people, the interval between heartbeats becomes slightly shorter during inhalation, meaning the heart rate increases.
During exhalation, the heart rate tends to slow again.
This is known as respiratory sinus arrhythmia. Despite the word “arrhythmia,” this breathing-related variation is generally a normal physiological pattern.
A deep breath can make this change more noticeable, especially in people who are already paying close attention to their heartbeat.
Why Might a Deep Breath Trigger a Noticeable Heartbeat?
Normal Respiratory Sinus Arrhythmia
The normal increase in heart rate during inspiration may simply be more noticeable during a very deep breath.
Premature Heartbeats
PACs and PVCs can feel like skipped beats, extra beats, pauses or sudden strong thumps.
A premature beat may happen around the same time as a deep breath without the breath necessarily being its direct cause.
Increased Heartbeat Awareness
Taking a deliberate deep breath draws your attention toward your chest, which may make an otherwise subtle heartbeat much easier to notice.
Anxiety
Anxiety can cause palpitations and can also make people monitor their breathing and heartbeat more closely.
Read more about anxiety and heart palpitations .
Stimulants
Caffeine, nicotine, energy drinks and some medications can contribute to premature beats or increased heartbeat awareness in susceptible people.
See our guide to caffeine and heart palpitations .
An Independent Arrhythmia
Sometimes a rhythm abnormality happens to become noticeable during a deep breath.
Repeated episodes should not automatically be explained by breathing alone.
Why Does a Deep Breath Sometimes Feel Like It Causes a Skipped Beat?
A sensation that the heart has “skipped a beat” is often caused by a premature contraction.
Two common types are:
- PACs — premature atrial contractions, which begin in the upper chambers of the heart.
- PVCs — premature ventricular contractions, which begin in the lower chambers.
The premature beat may be followed by a brief pause, after which the next heartbeat feels unusually strong.
That strong beat is often what a person describes as a sudden “thump” in the chest.
Occasional premature beats can occur in people without heart disease, but frequent, persistent or symptomatic premature beats may need evaluation.
Is One PVC “Absolutely Benign”?
It is better not to use the word “absolutely.”
Occasional PVCs are common, and in people without structural heart disease they often do not require treatment.
But the clinical importance depends on:
- How often they occur
- Whether they cause symptoms
- The overall PVC burden
- Whether structural heart disease is present
- Whether other rhythm abnormalities occur
Therefore, a recurrent skipped-beat sensation should not be dismissed solely because occasional PVCs are common.
Why Do I Notice Palpitations When I Yawn?
Yawning includes a deep inspiration and significant movement of the chest and respiratory muscles.
Because heart rate normally varies with respiration, the heartbeat may become easier to notice during a large yawn.
A person may also happen to experience a premature beat at that moment.
Repeated palpitations triggered by yawning do not automatically mean that the yawn is causing a dangerous arrhythmia, but a reproducible or troublesome pattern is worth describing to your healthcare professional.
Does a Deep Breath Squeeze the Vagus Nerve and Stop the Heart?
No.
The vagus nerve does play an important role in controlling heart rate as part of the parasympathetic nervous system.
Breathing also changes autonomic activity, which contributes to the normal variation in heart rate between inhalation and exhalation.
But it is not accurate to say that taking a deep breath physically constricts the vagus nerve, causes the heart to stop for a second and then allows the sinoatrial node to restart it.
Normal respiratory sinus arrhythmia is a much better explanation for the small breathing-related changes in heart rate seen in healthy people.
Is a Deep Breath the Same as a Vagal Maneuver?
No.
Specific vagal maneuvers, such as a properly performed Valsalva maneuver, may be used in certain patients with particular forms of supraventricular tachycardia.
That is different from simply taking a deep breath.
If you have never been diagnosed with the rhythm responsible for your rapid heartbeat, do not repeatedly perform rhythm-stopping maneuvers based only on internet advice.
Other Causes of Palpitations Should Still Be Considered
The fact that you notice the symptom during inhalation does not prove that breathing is the underlying cause.
Anxiety & Stress
Stress can increase heart rate and awareness of your heartbeat.
Caffeine & Nicotine
Stimulants may contribute to palpitations in susceptible people.
Dehydration
Significant fluid loss can contribute to a fast or noticeable heartbeat.
Anemia
Anemia can cause a fast heartbeat together with weakness, fatigue or shortness of breath.
Thyroid Disease
An overactive thyroid can increase heart rate or contribute to arrhythmias.
Arrhythmias
SVT, atrial fibrillation and other rhythms can cause recurrent racing or irregular palpitations.
What If I Also Feel Short of Breath?
A person may deliberately take repeated deep breaths because they already feel short of breath or anxious.
In that situation, the deep breathing may be a response to the symptom rather than the cause of the palpitation.
Anxiety, respiratory illness, anemia and cardiovascular problems can all potentially produce breathlessness together with palpitations.
Severe or new shortness of breath, particularly when associated with chest pain, fainting or significant palpitations, requires prompt medical assessment.
What Tests Are Needed?
Not everyone who notices a palpitation during a deep breath needs an extensive cardiac investigation.
Medical History
Your doctor may ask whether the sensation occurs with every deep breath or only occasionally, what the heartbeat feels like and how long it lasts.
Physical Examination
Pulse, rhythm, blood pressure and heart and lung examination may provide useful clues.
ECG / EKG
An ECG records the electrical activity of the heart and can identify many arrhythmias if they are present during the test.
Holter or Event Monitor
If episodes are intermittent, ambulatory monitoring can help capture the heart rhythm when the symptom actually occurs.
Selected Blood Tests
Depending on your history, your doctor may consider testing for anemia, thyroid abnormalities, electrolytes or other contributors.
Additional Testing Only When Needed
Echocardiography, exercise testing or specialist electrophysiology assessment may be appropriate when initial findings suggest a particular cardiac problem.
What Can You Do When It Happens?
Notice the Pattern
Does it happen with every breath, only with very deep breaths, after caffeine, when anxious or while lying down?
Check How the Heartbeat Feels
Is it one strong thump, a skipped beat, several rapid beats or a sustained irregular rhythm?
Compare the sensation with our heart palpitation symptoms guide .
Reduce Reproducible Triggers
If caffeine, nicotine, energy drinks or lack of sleep repeatedly precede your symptoms, reducing those triggers may help.
Use Calm, Comfortable Breathing
If anxiety is contributing, slow comfortable breathing may help reduce hyperventilation and the stress response.
Record Repeated Episodes
Write down when they occur, how long they last and whether dizziness, chest discomfort or breathlessness occurs.
Seek Evaluation if the Pattern Persists
Recurrent or worsening symptoms deserve medical assessment rather than repeated self-treatment.
What About Magnesium, Potassium, Baking Soda or Fish Oil?
Do not treat unexplained palpitations with potassium salts, magnesium products, baking soda, apple cider vinegar or fish-liver oil simply because the heartbeat occurs during a deep breath.
Potassium and magnesium abnormalities can affect heart rhythm, but supplementation should be based on an appropriate clinical reason.
Excessive supplementation can itself be harmful, particularly in people with kidney disease or those taking certain medications.
First Determine Whether the Breath Is the Trigger or Just the Moment You Notice It
When a patient tells me, “My heart skips when I take a deep breath,” I want to know whether this happens every single time or only occasionally.
I also ask whether the sensation is one strong beat, several rapid beats, a clearly irregular rhythm, or simply an increased awareness of the heartbeat.
Sometimes the patient is noticing normal breathing-related changes in heart rate. Sometimes a premature beat happens at the same moment. And sometimes we need to investigate another rhythm problem.
The pattern and associated symptoms are much more useful than assuming that breathing itself is damaging or stopping the heart.
When Should You See a Doctor?
Arrange medical evaluation if the palpitations:
- Are new or unexplained
- Occur repeatedly with deep breaths
- Are becoming more frequent
- Feel very fast or clearly irregular
- Continue for more than a brief moment
- Occur during exercise
- Are associated with significant weakness or dizziness
- Occur if you already have heart disease or a known arrhythmia
If dizziness accompanies the episodes, read our guide to dizziness and heart palpitations .
If the sensation occurs particularly while resting, you may also find heart palpitations while sitting useful.
When Palpitations With Breathing Need Urgent Care
Seek urgent or emergency medical care if palpitations occur with:
- Chest pain or significant chest pressure
- Fainting or loss of consciousness
- Severe shortness of breath
- Severe dizziness or near-fainting
- Sudden severe weakness
- A sustained very fast or severely irregular heartbeat
- Rapidly worsening symptoms
Do not assume that a serious symptom is harmless simply because it appeared while taking a breath.
Heart Palpitations When Breathing In: FAQs
Is it normal for heart rate to increase when breathing in?
Yes. In many healthy people, heart rate increases slightly during inhalation and slows during exhalation.
This normal pattern is called respiratory sinus arrhythmia.
Why do I feel a strong heartbeat when I take a deep breath?
A deep breath may make normal respiratory changes in heart rate easier to notice.
A premature beat may also occur around the same moment and produce a sudden thump.
Why does my heart feel like it skips when I inhale?
A skipped-beat sensation may be caused by a PAC or PVC followed by a brief pause and a stronger subsequent beat.
The sensation alone cannot determine exactly what rhythm occurred.
Can yawning cause heart palpitations?
Yawning includes a deep breath, and normal breathing-related heart-rate changes may become more noticeable during a yawn.
A premature beat can also happen at approximately the same time.
Does breathing in stimulate the vagus nerve?
Breathing and autonomic nervous-system activity are closely linked, including parasympathetic activity involving the vagus nerve.
But breathing in does not normally squeeze the vagus nerve and stop the heart.
Are occasional PVCs dangerous?
Occasional PVCs are common and often are not concerning in people without structural heart disease.
Frequent, persistent or highly symptomatic PVCs, or PVCs occurring in someone with heart disease, may require further evaluation.
Can anxiety make me notice palpitations when breathing?
Yes. Anxiety can increase heartbeat awareness and can also cause people to focus more closely on their breathing and chest sensations.
Do I need an ECG?
An ECG may be appropriate when palpitations are recurrent, prolonged, unusually fast, irregular or associated with other concerning symptoms.
If episodes are intermittent, longer ambulatory monitoring may be needed to capture them.
Continue Reading
Evidence Used for This Article
- American Heart Association. Other Heart Rhythm Disorders: Respiratory Sinus Arrhythmia .
- Cleveland Clinic. Sinus Arrhythmia .
- American Heart Association. Premature Contractions: PACs and PVCs .
- Mayo Clinic. Premature Ventricular Contractions: Symptoms and Causes .
- National Heart, Lung, and Blood Institute. Arrhythmias: Diagnosis .
- American Heart Association. Common Tests for Arrhythmia .