Heart Palpitations and Slow Breathing: What May Help and When to Get Checked

Slow breathing may help you stay calm while palpitations pass, but it does not stop them and it cannot tell you what is causing them. Most palpitations are harmless. Some are not, and no breathing exercise can sort one from the other. That is a job for a doctor.

This article explains what palpitations are, what slow breathing can and cannot do, a gentle 5-minute routine, why you should skip straining tricks unless a clinician taught them to you, and exactly when to get checked.

What are heart palpitations?

Palpitations are noticeable or uncomfortable heartbeats, felt in the chest, neck or throat. They can feel like racing, skipped or extra beats, pounding or fluttering, and they can last seconds or longer. They are usually harmless. Common causes include strenuous exercise, poor sleep, stress and anxiety, some medicines, alcohol, caffeine, nicotine and recreational drugs, and menopause or pregnancy. Less commonly, they are linked to iron deficiency anaemia, an overactive thyroid, a heart rhythm problem or heart valve disease (NHS).

Can slow breathing help palpitations?

It may help with the part you can influence: how worried you feel. Cleveland Clinic notes that anxiety about your heartbeat can make palpitations worse, and its advice includes staying calm and breathing deliberately (Cleveland Clinic). Breathwork lowers stress and anxiety by a small to moderate amount in trials of adults (Fincham et al., 2023).

What is missing is direct proof. No randomized trial of slow breathing as a way to stop palpitations turned up in the sources reviewed for this article. So treat it as a calming skill, not a remedy. Feeling calmer does not mean your rhythm is normal, and a rhythm problem is not fixed by relaxing.

How to try slow breathing during palpitations

1. Sit down and rest your back. Put your feet flat and let your shoulders drop.
2. Breathe in gently through your nose for 4 seconds. A small, quiet breath.
3. Breathe out slowly for 6 seconds. Soft lips or nose. No holds.
4. Keep going for 5 minutes. That is 6 breaths a minute. If 6 seconds feels long, try 3 in and 5 out.
5. Notice, do not fight. You can feel the heartbeat and let it be there while you breathe.
6. Write it down afterward. Note the time, how long it lasted, what you were doing and how much caffeine or alcohol you had. A diary helps your doctor find patterns (Cleveland Clinic).

Some sources suggest box breathing for palpitations. On this site we suggest skipping the holds, because gentle flow is the safer choice for most people with heart or blood pressure concerns. Our guide to why to skip breath holds and straining explains why.

If the palpitations do not ease after you have practiced, or they get worse, stop and get help. Do not keep trying.

What about vagal maneuvers and bearing down?

You may read about vagal maneuvers, such as splashing cold water on the face, bearing down or blowing out forcefully. A clinician-guided version is a real medical tool. In the REVERT trial, 433 adults with a fast rhythm called supraventricular tachycardia were enrolled in emergency departments. A modified strain, lying flat with the legs raised afterward, restored a normal (sinus) rhythm within a minute in 43 percent of people, compared with 17 percent for the standard strain, and no serious side effects were recorded (Appelboam et al., 2015). The authors said it can be taught to patients.

That trial was for one specific diagnosed rhythm, in a supervised setting. It is not a general home remedy for palpitations. Cleveland Clinic's cardiologist advises that stronger maneuvers, such as putting the face in cold water, should only be tried after talking with a provider. If you have high blood pressure or a heart condition, ask your clinician before you try any straining move.

When should you get checked?

Palpitations need medical attention in some situations. These lists come from the NHS and Cleveland Clinic.

• See a doctor soon if: they keep returning or become more frequent, they last more than a few minutes, you have a heart condition, or you have a family history of heart problems (NHS). A doctor may arrange an ECG, which records the heart's electrical signals through pads on the skin (NHS).
• Get emergency help if: the palpitations do not go away, or come with chest pain, shortness of breath or fainting (NHS). Cleveland Clinic adds chest, arm, neck, jaw or upper back pressure, heavy sweating, dizziness or confusion, and a resting heart rate above 100 beats a minute.
• Do not drive yourself to the emergency department. Get a lift or call emergency services (NHS).

Common mistakes

• Using breathing to avoid a check. If palpitations are new, frequent or long, see a doctor first.
• Holding your breath or straining hard. It can feel like it helps, but it is a clinical tool and not a first move at home.
• Ignoring the triggers. Caffeine, alcohol, nicotine and poor sleep are common causes. Cutting back can help (NHS).
• Fixating on every beat. Cleveland Clinic notes that dwelling on the fear can make palpitations worse. Practice, then let your attention move on.
• Stopping medicine on your own. Never change a prescribed medicine without your clinician.

Who should be careful

• Anyone with a known heart condition or a family history of heart problems: see your clinician for palpitations instead of managing them alone.
• Chest pain, trouble breathing, fainting or near-fainting: get emergency help. Do not wait to see if breathing works.
• People who take blood pressure or heart medicines: stand up slowly after practice and never change medicine without your clinician.
• People who are pregnant: pregnancy is one listed cause of palpitations (NHS), but tell your clinician about them. Keep breathing gentle with no holds.
• People with panic disorder or asthma: use slow, quiet breaths and skip holds and forceful breathing.