Palpitations in Women: Anxiety, Arrhythmia, or Both?

Women with palpitations face a diagnostic paradox: anxiety causes real cardiac symptoms, and real cardiac arrhythmias cause anxiety. The 2021 AHA/ACC chest pain guideline explicitly addresses sex-specific dismissal patterns, noting that women wait longer for cardiac evaluation and receive psychiatric diagnoses at higher rates than men with identical presentations. A 30-day event monitor captures symptom-rhythm correlation in 67% of cases (Kinlay, Am J Cardiol, 1996), yet most women with palpitations never receive one. The question is not whether palpitations are anxiety or cardiac. The question is whether anyone looked.

The Diagnosis That Was Never Excluded

She had been told for five years her palpitations were anxiety. Her Holter showed runs of non-sustained ventricular tachycardia during her “anxiety episodes.” Anxiety is a diagnosis of exclusion. Her palpitations were not excluded.

I see this pattern weekly. A woman in her late forties describes episodes of rapid, irregular heartbeats. They started two years ago. She went to the emergency department the first time. The ECG was normal. The troponin was normal. She was told it was a panic attack. She believed it because the episodes came with dread and a sense of doom. She stopped going to the ED. She started taking benzodiazepines.

When she finally ended up in my office, she had been having these episodes for 200 weeks. Not once had anyone placed a monitor on her chest during one.

The clinical error is not diagnostic. The error is temporal. An ECG captures 10 seconds. A standard Holter captures 24 to 48 hours. Paroxysmal arrhythmias, by definition, occur intermittently. If your symptoms happen twice weekly, a 24-hour monitor has a 14% chance of capturing an episode. A 30-day monitor has a 67% chance Kinlay 1996. 5 / Solid

The woman in my office had paroxysmal atrial fibrillation. Her episodes lasted 4 to 8 minutes. Her 24-hour Holter, performed three years prior, showed “frequent PACs, otherwise unremarkable.” The monitoring duration was insufficient to capture her actual rhythm. She was not misdiagnosed. She was undermonitored.

The Physiology of Palpitation Perception

Palpitations are the conscious perception of cardiac activity. This is not the same as arrhythmia. Many arrhythmias are silent. Many palpitations are physiologically normal.

In a study of 1,392 asymptomatic women undergoing 24-hour Holter monitoring, 48% had at least one premature ventricular contraction (PVC) and 58% had at least one premature atrial contraction (PAC) Bjerregaard 1983. 5 / Solid These women were asymptomatic. They did not perceive their ectopy. The electrical events occurred. The sensory experience did not.

Palpitation perception depends on three factors: the magnitude of the hemodynamic disturbance, the sensitivity of interoceptive pathways, and the psychological context of attention.

Women have heightened interoceptive sensitivity compared to men. This is not pathology. It is physiology. The female autonomic nervous system operates with higher baseline vagal tone and greater heart rate variability. This creates more perceptible beat-to-beat variation. A PVC that a man does not notice, a woman feels as a thump or skip.

The scoping review “Correlates of palpitations during menopause” (Gaston-Johansson, Menopause 2022) reported that 40.2% of perimenopausal women and 54.1% of postmenopausal women experience palpitations Gaston-Johansson 2022. 4 / Promising The prevalence is staggering. Half of all postmenopausal women know what it feels like when their heart beats differently. Yet fewer than 20% receive extended cardiac monitoring.

The mechanism involves estrogen withdrawal. Estrogen modulates cardiac ion channels, autonomic tone, and vascular reactivity. During perimenopause, estrogen levels fluctuate wildly before declining permanently. Each hormonal shift triggers a cascade of cardiovascular responses: increased resting heart rate, decreased heart rate variability, heightened catecholamine sensitivity. The heart does not beat differently because of anxiety. The heart beats differently because the hormonal milieu that stabilized its rhythm for 35 years is gone.

The Bidirectional Circuit

Anxiety causes palpitations. Palpitations cause anxiety. The relationship is bidirectional and self-reinforcing.

Panic disorder includes palpitations as a core diagnostic criterion. In Katon’s landmark study, 87% of patients experienced palpitations during panic attacks Katon 1984. The catecholamine surge of fight-or-flight physiology increases heart rate, contractility, and ectopy. These are real cardiac changes caused by the brain. They are not imaginary. They are not “just” anxiety. They are the cardiovascular manifestation of a psychiatric state.

But the reverse is equally true. In a cohort of 98 women presenting to an emergency department with palpitations, 34% had a psychiatric diagnosis. However, 24% had a documented cardiac arrhythmia on monitoring Weber 1997. 4 / Promising One in four women had objective cardiac pathology. More critically, the psychiatric and cardiac groups overlapped. Some women had both.

I call this the Palpitation Feedback Loop. A woman experiences a PVC. She perceives it as abnormal. Her amygdala activates a threat response. Catecholamines surge. More PVCs occur. Each PVC confirms her fear that something is wrong. The fear generates more catecholamines. The catecholamines generate more PVCs. The loop is physiologic, not psychological. Breaking it requires addressing both the perception and the rhythm.

Women don’t die from what they have. Women die from what they hold.

The woman who holds her palpitations as proof of imminent death will generate the catecholamine environment that sustains them. The woman who receives a concrete diagnosis, whether paroxysmal atrial fibrillation or benign PVCs, can release the fear that amplifies the symptoms. Diagnosis is therapeutic. Uncertainty is arrhythmogenic.

The Arrhythmias That Favor Women

Not all arrhythmias occur equally between sexes. Three specific rhythm disturbances show female predominance and require deliberate screening.

Inappropriate sinus tachycardia (IST) affects women at a 4:1 ratio compared to men. The resting heart rate exceeds 100 beats per minute without identifiable cause. The heart is structurally normal. The electrophysiology is normal. But the patient feels every beat. IST is not dangerous but is intensely symptomatic. It is frequently misdiagnosed as anxiety disorder. The distinguishing feature: heart rate remains elevated during sleep, which does not occur in anxiety.

Atrioventricular nodal reentrant tachycardia (AVNRT) accounts for 60% of paroxysmal supraventricular tachycardia and occurs twice as often in women as men. Episodes start and stop abruptly. Heart rates reach 150 to 250 beats per minute. Patients describe a sense of impending doom. The symptoms perfectly mimic panic attacks. The difference: AVNRT is curable with catheter ablation. Panic attacks require ongoing management.

Drug-induced QT prolongation and torsades de pointes show striking female predominance. Women account for 70% of all cases of drug-induced torsades de pointes Makkar 1993. 5 / Solid The baseline QTc interval in women is 10 to 20 milliseconds longer than in men after puberty. Medications that block potassium channels, including common antibiotics like azithromycin, antidepressants like citalopram, and antiemetics like ondansetron, push women closer to the threshold for lethal arrhythmia.

The clinical implication: any woman taking QT-prolonging medications who reports new palpitations requires an ECG. Not reassurance. Not a reminder to reduce stress. An ECG that measures the QTc interval.

Atrial fibrillation deserves separate discussion. While men develop AF more often overall, women with AF have substantially worse outcomes. The stroke risk in women with AF is 1.5 to 2.0 times higher than in men with identical CHA₂DS₂-VASc scores Friberg 2012. 5 / Solid The CHA₂DS₂-VASc scoring system assigns one additional point for female sex. This is not bias. This is biology. Women with AF throw more clots. They deserve more aggressive anticoagulation consideration.

The Monitoring Algorithm

The diagnostic yield of cardiac monitoring depends entirely on matching the monitoring duration to the symptom frequency.

If symptoms occur daily: A 24- to 48-hour Holter monitor is appropriate. The probability of capturing an event exceeds 80%.

If symptoms occur weekly: A 7- to 14-day continuous monitor is required. The Holter will miss the diagnosis in most cases.

If symptoms occur monthly or less: A 30-day event monitor or an implantable loop recorder is necessary. Anything shorter is inadequate.

The 2020 Canadian Cardiovascular Society guidelines explicitly recommend extended monitoring for women with palpitations given the higher prevalence of paroxysmal arrhythmias and the documented pattern of underdiagnosis Andrade 2020. 5 / Solid

The practical barrier is not medical. It is administrative. Insurance companies deny extended monitoring requests. Primary care physicians order 24-hour Holters because that is what the EMR template suggests. Patients accept the normal Holter result as definitive. The system fails women through efficiency, not malice.

I instruct patients to document symptom frequency before requesting monitoring. If you have episodes twice weekly, that fact alone justifies a 14-day monitor. Bring a log. Dates, times, durations, associated symptoms. The log is evidence. Evidence generates authorization.

The Evaluation Framework

Every woman with palpitations deserves a systematic evaluation before anxiety becomes the default diagnosis. I call this the Palpitation Exclusion Protocol.

Step 1: Baseline assessment. ECG, thyroid function tests (TSH at minimum, free T4 if borderline), complete blood count, basic metabolic panel. These identify the immediately correctable: hyperthyroidism, anemia, electrolyte disturbances, baseline QT prolongation.

Step 2: Symptom characterization. Duration matters. Palpitations lasting less than 30 seconds are usually PVCs or PACs. Palpitations lasting minutes to hours suggest sustained arrhythmia. Palpitations associated with syncope or near-syncope require urgent evaluation. Palpitations occurring exclusively during panic attacks, without any episode outside of panic context, are more likely anxiety-predominant. But “more likely” is not a diagnosis.

Step 3: Monitoring matched to frequency. See algorithm above. The monitoring duration must capture at least one symptomatic episode. A normal monitor that missed all your symptoms proves nothing.

Step 4: Symptom-rhythm correlation. This is the diagnostic endpoint. The patient presses a button during symptoms. The monitor records the rhythm. If the rhythm is normal sinus during symptoms, anxiety-driven palpitation perception is established. If the rhythm is abnormal, the arrhythmia is identified. Until this correlation exists, the diagnosis is incomplete.

Step 5: Directed intervention. Anxiety-driven palpitations require cognitive behavioral therapy, possibly medication, and reassurance based on documented normal rhythm. Arrhythmias require specific treatment: rate control, rhythm control, ablation, anticoagulation. Some patients require both.

When Anxiety Is Real

I do not dismiss anxiety. Anxiety is a real disease with real cardiovascular consequences.

Chronic anxiety states sustain elevated cortisol and catecholamine levels. These drive endothelial dysfunction, platelet activation, and inflammatory pathway upregulation via NF-kB signaling. Anxiety is a cardiovascular risk factor. Women with anxiety disorders have a 26% increased risk of incident coronary heart disease Emdin 2016. 4 / Promising

The error is not acknowledging anxiety. The error is diagnosing anxiety without evidence. The error is treating anxiety as mutually exclusive with cardiac disease. The error is assuming a psychiatric diagnosis means no further cardiac evaluation is warranted.

The correct clinical stance: anxiety and arrhythmia coexist. In the ED cohort I cited earlier, the overlap was substantial. Women with documented SVT also had anxiety. Women with panic disorder also had PVC burdens requiring treatment. The either/or framing is false. The both/and framing saves lives.

Takotsubo cardiomyopathy, discussed in detail elsewhere on this site, represents the extreme case. Emotional stress triggers acute cardiac dysfunction indistinguishable from myocardial infarction. The distinction between “emotional” and “cardiac” collapses entirely. The stress was emotional. The cardiac dysfunction was real. Women account for 90% of Takotsubo cases. The female heart is not weaker. It is more connected to the limbic system. That connection can kill.

The Next Step

If you have palpitations and have been told they are anxiety without cardiac monitoring that captured a symptomatic episode, your evaluation is incomplete.

At your next appointment, request three specific things by name:

1. An ECG to assess baseline QTc interval
2. A 14-day event monitor (not a 24-hour Holter unless your symptoms are daily)
3. Documentation that your thyroid function has been checked within the past year

If your physician declines extended monitoring, ask them to document the refusal in your chart with their clinical reasoning. This is not confrontational. This is standard of care. The Canadian Cardiovascular Society recommends extended monitoring for women with unexplained palpitations. Your request is evidence-based.

Print this article. Bring it to your appointment. The goal is not to diagnose yourself. The goal is to receive the evaluation you deserve.

Frequently Asked Questions

How do I know if my palpitations are anxiety or a heart problem?

You cannot know without cardiac monitoring that captures a symptomatic episode. The sensation of palpitations is identical whether the underlying rhythm is normal sinus, premature beats, or sustained arrhythmia. A 30-day event monitor captures symptom-rhythm correlation in 67% of cases. During your palpitations, you press a button. The monitor records your rhythm. If the rhythm is normal sinus, anxiety-driven perception is confirmed. If the rhythm is abnormal, you have an arrhythmia diagnosis. Without this correlation, any diagnosis is speculation. A normal ECG in the emergency department proves only that your rhythm was normal for those 10 seconds. It proves nothing about your symptomatic episodes.

Are palpitations during perimenopause dangerous?

Most perimenopausal palpitations reflect benign ectopy or sinus tachycardia driven by estrogen fluctuation. The scoping review from Menopause in 2022 documented that 40% of perimenopausal and 54% of postmenopausal women experience palpitations. These numbers reflect the prevalence of the symptom, not the prevalence of dangerous arrhythmia. However, new-onset atrial fibrillation peaks during the perimenopausal years. Any palpitation episode lasting more than 30 seconds, any episode associated with lightheadedness or syncope, and any episode accompanied by chest discomfort warrants evaluation. The reassurance that “it’s just hormones” may be accurate but should follow, not replace, appropriate monitoring.

What tests should I ask for if my doctor says my palpitations are just anxiety?

Request an ECG, thyroid function tests, and extended cardiac monitoring. Specify that you want a 14-day or 30-day event monitor rather than a 24-hour Holter. Explain your symptom frequency: if episodes occur twice weekly, state that explicitly. The monitoring duration must match the symptom interval. If your episodes are monthly, a 24-hour Holter has a near-zero probability of capturing one. Ask your physician to document in your chart that you requested extended monitoring and their reasoning if they decline. This documentation protects you and clarifies the clinical decision. Anxiety is a valid diagnosis only after cardiac causes are excluded. Exclusion requires evidence.

Why are women more likely to have palpitations dismissed as anxiety?

Women present with palpitations 1.5 times more frequently than men. Historical medical culture attributed female cardiac and neurological symptoms to hysteria, a bias that persists in subtler forms. Modern studies document that women with chest pain and palpitations wait approximately 30% longer than men for cardiac evaluation and receive psychiatric diagnoses at higher rates for identical presentations. The 2021 AHA/ACC chest pain guideline explicitly addresses this pattern and recommends sex-specific awareness in clinical evaluation. The dismissal is not evidence-based. It is historical and systemic. Your symptoms deserve the same workup that a man with identical complaints would receive.

Can anxiety actually cause heart arrhythmias?

Yes. The catecholamine surge during anxiety states increases heart rate, enhances automaticity of cardiac tissue, and can trigger premature beats. In patients with underlying predisposition, catecholamine surges can provoke atrial fibrillation, supraventricular tachycardia, and even ventricular arrhythmia. The relationship is bidirectional and physiologically verified. Anxiety causes the cardiac electrical environment that produces arrhythmia. Arrhythmia causes the sensory experience that amplifies anxiety. Breaking this cycle requires addressing both components. Cognitive behavioral therapy reduces catecholamine tone. Beta-blockers reduce cardiac sensitivity to catecholamines. Ablation eliminates the arrhythmia substrate. Treatment plans that address only the anxiety or only the arrhythmia will fail. Both matter. Both deserve treatment.