Most palpitations in perimenopause are benign. Atrial fibrillation is the one that is not — because it raises stroke risk substantially and is entirely treatable once identified. It becomes more common with age, women are diagnosed later than men, and symptoms in women are more often dismissed as anxiety.
Where we stand: Menova is an independent publication. We sell no devices, we are not your doctor, and this is general education, not a diagnosis. Any irregular or prolonged palpitation should be assessed.
Why this one matters
Atrial fibrillation is the most common sustained heart rhythm disturbance. In AF the upper chambers of the heart quiver rather than contracting properly, blood can pool, and clots can form and travel to the brain.
Untreated AF is associated with a substantially increased risk of stroke — and strokes caused by AF tend to be more severe.
The treatable part: anticoagulation reduces that stroke risk considerably. Which makes the diagnosis, not the symptom, the thing that matters.
Why women are diagnosed later
Documented and worth knowing:
- Symptoms in women are more often atypical — fatigue, breathlessness, reduced exercise capacity, rather than a clear sense of a racing heart
- Palpitations in midlife women are frequently attributed to anxiety or to menopause without an ECG
- Women are less likely to be offered anticoagulation in some studies, despite having a higher AF-related stroke risk than men
- AF is often intermittent early on, so a normal ECG in clinic does not exclude it
That combination is why "it's just your hormones" is worth pushing back on when the palpitation is irregular.
Telling it apart from menopausal palpitations
Typical perimenopausal palpitations: a brief flutter or pounding, often alongside a hot flash, regular rhythm, lasting seconds to a couple of minutes, settling on their own. See heart palpitations in perimenopause.
Suggestive of AF:
- Irregular — genuinely chaotic rather than fast-but-even
- Lasting much longer — many minutes, hours, or continuously
- Breathlessness or reduced exercise tolerance
- Fatigue out of proportion
- Dizziness or near-fainting
- Chest discomfort
- Sometimes no symptoms at all, found incidentally
Check your own pulse. Feel at the wrist for 30 seconds. A rhythm that is completely irregular — no discernible pattern — is worth showing to a clinician. This costs nothing and is the single most useful thing you can do.
How to check your own pulse
Free, takes thirty seconds, and almost nobody is taught it — despite being the simplest thing that can catch this.
Sitting down and rested, turn one hand palm up. Place the first two fingers of the other hand on the thumb side of your wrist, just below the crease. Press lightly until you feel the beat. Do not use your thumb, which has a pulse of its own.
Count for thirty seconds and double it for your rate. But the rate is not the point.
The point is the rhythm. A normal pulse is regular — beat, beat, beat, evenly spaced. In atrial fibrillation it is irregularly irregular: no pattern at all, beats bunching and gapping, sometimes so uneven you lose count. That chaotic quality is the finding, and once you have felt a regular pulse a few times the difference is unmistakable.
Do it a few times when you feel fine, so you know your own normal. Then check when something feels wrong. A pulse you can feel is more informative than a symptom you are trying to describe.
Two practical notes:
- Occasional single skipped or extra beats are common and usually benign — a regular rhythm with the odd extra beat is a different thing from no rhythm at all
- Many home blood pressure monitors flag an irregular heartbeat automatically, often with a small heart-with-a-line symbol. If yours keeps showing it, that is worth reporting rather than ignoring — see blood pressure and menopause for how to measure properly
If you find an irregular rhythm, that is a reason to be assessed rather than to panic — it needs an ECG to confirm, and it is entirely treatable once identified. If it comes with chest pain, severe breathlessness, fainting or a rate that stays very fast, treat it as urgent.
Seek urgent care for
- Chest pain with palpitations
- Severe breathlessness
- Fainting
- Palpitations that will not stop
- Signs of stroke — sudden facial droop, arm weakness, speech difficulty. Call emergency services immediately; this is the outcome AF treatment exists to prevent
What raises AF risk in this decade
- Age, the largest factor
- High blood pressure — the biggest modifiable one; see blood pressure and menopause
- Alcohol. A clear, dose-related association, and reducing intake reduces recurrence in people who already have AF — see alcohol in midlife
- Sleep apnea, which is strongly associated with AF, rises sharply in women after menopause, and is badly under-diagnosed. Treating it improves AF outcomes — see sleep apnea after menopause
- Obesity, and weight loss reduces AF burden
- Overactive thyroid, which is a recognised and reversible cause — see perimenopause versus thyroid and thyroid nodules and neck lumps
- Diabetes — see menopause with diabetes
- Endurance exercise at high volumes, paradoxically, though the overall benefit of exercise remains
- Excess caffeine, though moderate intake is not established as a cause — see caffeine in menopause
How it is diagnosed
- ECG — definitive when AF is happening
- Ambulatory monitoring — a 24-hour to 14-day monitor, or a patch, since intermittent AF is missed on a single ECG
- Blood tests — thyroid function, full blood count, kidney function, electrolytes
- Echocardiogram, to look at heart structure
- Sleep study, where apnea is suspected
About smartwatches: several consumer devices can detect an irregular rhythm suggestive of AF, and some produce a single-lead ECG. They are a prompt, not a diagnosis — false positives are common. If yours flags an irregular rhythm, that is a legitimate reason to ask for a proper ECG rather than something to dismiss or panic about. See sleep trackers in menopause.
Treatment, in outline
Stroke prevention comes first. Anticoagulation is decided on your overall stroke risk using a scoring system, not on how symptomatic you are. Note that female sex is included as a risk factor in the commonly used score.
Aspirin is not an adequate substitute for anticoagulation in AF — an outdated approach that persists.
Rate control — medication to slow the heart rate.
Rhythm control — medication, cardioversion, or catheter ablation to restore normal rhythm.
Treating the drivers — blood pressure, alcohol, sleep apnea, weight, thyroid. This part changes the course of the condition and is often under-emphasised.
If you are put on an anticoagulant and you are still having periods, heavy bleeding is a common and manageable consequence — see heavy periods while taking a blood thinner.
Does HRT cause it?
There is no established evidence that hormone therapy causes atrial fibrillation, and having AF does not automatically rule out hormone therapy.
What is relevant: if you are on an anticoagulant or have cardiovascular disease, the route matters — transdermal estrogen is not associated with the clot risk of oral estrogen and is generally preferred. This is a conversation with the clinician managing your heart, not a reason to assume no. See HRT and blood clot risk and what to do if your doctor says no.
Non-hormonal options exist for hot flashes if hormones are not appropriate — see non-hormonal prescription options.
What to say
"I've been having palpitations that last much longer than a few minutes, and when I feel my pulse it's completely irregular. I'm also more breathless than usual on stairs. Could I have an ECG, and if that's normal, an ambulatory monitor? Could my thyroid be checked too?"
That describes irregularity, duration and the associated symptom, and it names the test that a single normal ECG cannot replace.
Our free 30-day symptom tracker lets you record episodes — how long, how often, what you were doing — which is exactly what determines whether monitoring is arranged. The free printable visit prep sheet turns it into one page.
The free 2-minute Menova self-check organizes your wider symptom picture — no account, not a diagnosis, and your answers never leave your device.
The one thing
Most palpitations in this decade are benign. An irregular pulse is not something to attribute to hormones — it is a five-minute ECG, and if it is AF, treating it prevents strokes.
This article is general education, not medical advice or a diagnosis. Call emergency services for signs of stroke, chest pain, severe breathlessness, or fainting. Irregular or prolonged palpitations should be assessed promptly by a licensed clinician.
Sources: NHLBI — Atrial Fibrillation, American Heart Association — Atrial Fibrillation, NICE NG196 — Atrial Fibrillation, and The Menopause Society.