Yes. Anxiety is one of the most common causes of heart palpitations. Feeling your heart pound, flutter, race, or skip is frightening precisely because the heart is involved, and the mind immediately reaches for the worst explanation. Understanding why anxiety causes palpitations, and how to tell them apart from palpitations that warrant medical attention, is genuinely useful.
During the anxiety response, the adrenal glands release adrenaline and noradrenaline into the bloodstream. These hormones act directly on the heart: they increase heart rate, increase the force of each contraction, and can alter the regularity of the heartbeat. The result is the sensation of the heart pounding more forcefully, racing faster, fluttering, or occasionally seeming to skip a beat.
All of these sensations are real. They reflect actual changes in cardiac activity driven by the stress hormones. They are not imaginary, psychosomatic in the dismissive sense, or evidence of heart disease. They are the normal cardiac response to adrenaline.
Racing heart (sinus tachycardia): The most common anxiety-related palpitation. Heart rate increases above its resting level, sometimes significantly during panic attacks, where it can reach 140 to 160 beats per minute. This is uncomfortable but not dangerous in people without underlying cardiac conditions.
Pounding or forceful heartbeat: The sensation of the heart beating very hard, even at a normal rate. Adrenaline increases the force of cardiac contraction, which can be felt through the chest wall, particularly when lying down or sitting quietly.
Fluttering or irregular heartbeat: Adrenaline can cause brief arrhythmias, including ectopic beats, where the heart produces an extra beat followed by a slight pause. The extra beat and the pause are together experienced as a "skipped beat" or flutter. These are benign in the vast majority of people with no underlying cardiac disease.
Palpitations are particularly susceptible to creating anxiety-palpitation cycles. You notice your heart racing. If you have health anxiety or cardiac anxiety, this triggers alarm: what if something is wrong with my heart? The alarm activates the anxiety response. Adrenaline increases further. The heart rate increases further. The palpitations worsen. The worsening confirms the fear that something is wrong. The cycle escalates.
This is why people with panic disorder often experience their most intense palpitations during a panic attack about palpitations: the anxiety about the symptom is directly producing and worsening the symptom.
Slow diaphragmatic breathing. The most effective immediate intervention. Breathing out slowly activates the vagus nerve and the parasympathetic nervous system, which directly slows heart rate. An extended exhale of 6 to 8 counts produces measurable reduction in heart rate within a few breaths.
Reducing stimulants. Caffeine directly increases heart rate and the frequency of ectopic beats. In people prone to anxiety palpitations, reducing or eliminating caffeine is one of the highest-return changes available. Alcohol also causes rebound tachycardia as it metabolises.
Getting a cardiac evaluation if you have not had one. If palpitations are new and you have never had an ECG, getting one is sensible rather than catastrophising. A normal result gives your mind something concrete to work with and removes one of the most powerful maintaining thoughts from the anxiety-palpitation cycle.
Treating the anxiety. Palpitations driven by anxiety reduce when the anxiety reduces. CBT that addresses the health anxiety component, particularly the monitoring and catastrophising about cardiac symptoms, produces significant reduction in palpitation-related anxiety. The chest pain article covers the related picture of anxiety-driven cardiac symptoms in more detail.
Anxiety-related palpitations are sometimes exacerbated by electrolyte imbalances, particularly low magnesium and low potassium. Both minerals play a role in cardiac electrical function, and deficiency can increase the frequency of ectopic beats and palpitations. Anxiety contributes to magnesium depletion through several mechanisms: cortisol promotes urinary magnesium excretion, and hyperventilation during anxiety episodes changes blood pH in ways that affect electrolyte distribution.
For people with frequent anxiety-related palpitations, a blood test checking magnesium and potassium levels is a low-effort investigation that occasionally reveals a correctable contribution. Dietary magnesium, from leafy greens, nuts, and seeds, or supplemental magnesium glycinate, is generally safe and sometimes produces meaningful reduction in palpitation frequency.
One of the most reliably counterproductive responses to anxiety-related palpitations is pulse-checking. Taking your pulse when you feel palpitations directs full attention to the cardiac sensations, which increases their vividness and perceived intensity. It also maintains the health anxiety that is driving the palpitation-anxiety cycle, because the checking behaviour communicates to your nervous system that the situation requires monitoring, which the nervous system interprets as evidence of ongoing threat.
Health anxiety treatment specifically targets pulse-checking and similar monitoring behaviours, gradually reducing their frequency and allowing the nervous system to learn that the palpitations are manageable and do not require constant monitoring. This is one of the reasons health anxiety treatment, rather than general reassurance, is the most effective intervention for palpitation-focused health anxiety. The health anxiety test is worth taking if monitoring, checking, and reassurance-seeking about physical symptoms are significant parts of your pattern.
"The heart pounds because adrenaline told it to. Adrenaline was released because anxiety activated. The palpitations are real. The threat that caused them is not."
💡 Important: This article does not replace medical evaluation. If palpitations are new, severe, accompanied by chest pain or faintness, or if you have a known cardiac condition, see a doctor before attributing them to anxiety.
Hyperthyroidism, overactivity of the thyroid gland, produces symptoms that are virtually indistinguishable from anxiety: palpitations, racing heart, tremor, sweating, nervousness, and sleep disruption. It is one of the medical conditions most commonly misattributed to anxiety, and vice versa. A simple TSH (thyroid stimulating hormone) blood test can confirm or exclude thyroid overactivity. If you have significant anxiety and palpitations and have never had thyroid function tested, asking your doctor for a TSH test is a reasonable request that is straightforward to investigate.
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