Heart palpitations caused by anxiety typically last a few seconds to a few minutes, ending once the stressful moment passes. In some cases, the sensation can stretch to hours, particularly during prolonged periods of high stress or a panic attack. But the classic pattern is that they start suddenly, feel alarming, and resolve quickly on their own.
That quick timeline is actually one of the most useful ways to tell anxiety-related palpitations apart from something more serious. If your palpitations are brief, come on during moments of stress, and disappear when you calm down, anxiety is the most likely explanation.
What Anxiety Palpitations Feel Like
The sensation varies from person to person, but common descriptions include a heart that feels like it’s beating too fast, pounding hard, flip-flopping, fluttering rapidly, or skipping beats. You might notice the sensation in your chest, but it can also show up in your throat or neck. These feelings can strike during a stressful conversation, while lying in bed at night, or seemingly out of nowhere if your body is running on background anxiety.
Most of these sensations are harmless. What you’re feeling is your heart responding to a flood of stress hormones. When your brain perceives a threat (real or imagined), it triggers the release of adrenaline. That adrenaline speeds up your heart’s internal pacemaker cells, making them fire faster and sometimes less regularly. The result is a heart that temporarily beats harder, faster, or with an occasional extra beat that feels like a skip or a thud.
Why Anxiety Triggers Extra Heartbeats
Stress doesn’t just make your heart beat faster. It can also cause premature beats, where your heart fires slightly out of rhythm. These are extremely common, and research confirms the connection is real: one study in the Journal of Clinical Medicine found that people reporting psychosocial stress were nine times more likely to experience premature ventricular contractions compared to those who did not report stress. These extra beats are what create the “skipping” or “flopping” sensation, and in otherwise healthy people, they’re not dangerous.
Your body weight plays a small role too. The same study found that BMI was independently associated with the likelihood of these extra beats, meaning that managing weight alongside stress can reduce how often they occur.
Panic Attacks and Longer Episodes
During a full panic attack, palpitations can last longer than a brief anxious moment. A panic attack itself typically runs from a few minutes to about half an hour, but the physical aftereffects, including a sense of a racing or unsettled heart, can linger for several hours afterward. This residual feeling is your nervous system slowly winding down from a massive adrenaline surge, not a sign that something has gone wrong with your heart.
People with chronic anxiety or generalized anxiety disorder may notice palpitations recurring throughout the day or across several days, especially during high-stress periods. Each individual episode still tends to be brief, but the pattern of repeated episodes can make it feel like palpitations are constant. This cycle often intensifies because noticing palpitations creates more anxiety, which triggers more adrenaline, which causes more palpitations.
How to Shorten an Episode
The fastest way to interrupt anxiety palpitations is to activate your vagus nerve, which acts as a brake on your heart rate. Slow, deep belly breathing is the most accessible technique: breathe in through your nose for a count of six and out through your mouth for a count of eight, watching your belly expand on the inhale and contract on the exhale. Just a few minutes of this can shift your nervous system out of fight-or-flight mode and slow your heart.
Cold exposure also works surprisingly well. Splashing very cold water on your face or finishing a shower with a cold rinse for 30 seconds helps stimulate the vagus nerve and slows your heart rate. This is a physiological reflex, not a placebo. Your body redirects blood flow to your brain in response to cold, and heart rate drops as part of that process.
For longer-term prevention, regular endurance exercise (jogging, cycling, swimming) trains your vagus nerve to be more responsive, making your heart less reactive to stress over time. Gentle massage, particularly of the neck, shoulders, and feet, also increases vagal tone. Deep tissue or painful massage can have the opposite effect, triggering a stress response instead.
When Palpitations Signal Something Else
Anxiety is one of the most common causes of palpitations, but not every episode is anxiety-related. The distinguishing factor is duration and context. Palpitations that happen frequently, last more than a few minutes, or occur without any identifiable stressor may point to a heart rhythm issue rather than anxiety.
Certain accompanying symptoms raise the level of concern significantly. Palpitations paired with fainting or near-fainting, chest pain or pressure, or severe shortness of breath warrant a medical evaluation. The same applies if you have a personal history of heart disease, a family history of sudden cardiac death or recurrent fainting, or if you’ve been told you have a structural heart condition.
A standard 12-lead ECG is typically the first step in ruling out a cardiac cause. This test is quick, painless, and can identify rhythm abnormalities like atrial fibrillation, where the upper chambers of the heart quiver instead of beating in a coordinated way. If palpitations are intermittent and hard to catch on a single ECG, a wearable heart monitor over days or weeks can help capture what’s happening during an episode.
For most people searching this question, the palpitations are brief, tied to stress, and resolve on their own. The fact that they feel frightening is part of what makes them persist: your body interprets the pounding as a threat, feeds the anxiety loop, and keeps the adrenaline flowing. Breaking that cycle with breathing techniques, cold exposure, or simply understanding what’s happening in your body is often enough to make the episodes shorter and less frequent over time.