A fast heartbeat of over 100 beats per minute can happen for various reasons, including drug reactions, alcohol, stress, and some health conditions. If the cause is unclear, it may seem to happen for no reason.
According to the American Heart Association (AHA), the average adult has a resting heartbeat of about
Most causes of a rapid heartbeat are not dangerous. However, a faster than usual heartbeat can be a symptom of an underlying health problem.
This article looks at what can cause a person’s heart to beat faster, treatments, and when to see a doctor.
When the body experiences stress, the adrenal glands release epinephrine, or adrenaline. The body has two adrenal glands, one on top of each kidney.
The body uses epinephrine to prepare a person for immediate action. Epinephrine can cause a person to experience:
- increased heart rate
- increased blood pressure
- enlarged pupils
- palpitations, where the heart rate can increase, decrease, or feel like it has skipped a beat
Generally, a person should find that their symptoms decrease once they no longer feel stress.
Learn more about anxiety here.
A person who experiences stressful emotions regularly may be at risk of developing certain conditions. The American Psychological Association (APA) note that chronic stress can increase a person’s chances of developing certain conditions, such as high blood pressure, heart attack, or stroke.
A person may be able to manage their stress
- exercising regularly
- engaging in relaxing activities, such as meditation or massage
- setting goals and priorities
- speaking to friends and family for emotional support or help
- talking with a doctor or healthcare provider
Substances that can cause a person’s heartbeat to speed up include:
Caffeine is a stimulant found in many drinks, such as coffee, tea, certain sodas, and energy drinks. Caffeine powder is also available as a dietary supplement.
The Food & Drug Administration (FDA) suggest that an adult could have up to
A person who has too much caffeine may experience:
- feeling jittery
- fast heart rate
- upset stomach
- a headache
- a feeling of unhappiness
Learn more about caffeine here.
A study from 2014 found that even a small amount of alcohol can increase a person’s chances of developing atrial fibrillation. Atrial fibrillation is a condition that causes a person’s heart to beat irregularly and sometimes abnormally fast.
A further study from 2017 tested people’s breath for alcohol concentration levels. Researchers found that as a person’s alcohol concentration level increased, so did their heart rate.
Learn how alcohol affects the body here.
Nicotine is a highly addictive chemical found in cigarettes. According to the AHA, nicotine can cause
Research from 2016 noted that nicotine could increase a person’s heart rate by
Learn more about nicotine here.
Illegal stimulants, such as cocaine and amphetamines, can cause a person to have a higher heart rate.
Doctors sometimes use amphetamines to treat people who have ADHD or narcolepsy. However, amphetamines can cause a series of side effects, including:
- high blood pressure
- elevated heart rate
- a headache
- dry mouth
- abdominal cramps
- chills or fever
Learn more about amphetamines here.
According to the United Kingdom’s National Health Service (NHS), certain medications can cause a person to have an irregular heartbeat. These medications include:
- high blood pressure medication
- antifungal medication
Find out more about the causes of heart palpitations here.
Certain herbal supplements can increase a person’s heart rate, such as:
Bitter orange: People might use bitter orange for heartburn, nasal congestion, weight loss, appetite suppression or stimulation, and athletic performance. Certain studies state that
Valerian: Valerian is a supplement used for anxiety, insomnia, depression, premenstrual syndrome, headache, and menstrual issues.
Ginseng: Ginseng is promoted as a general tonic to improve wellbeing. However, ginseng has
Learn which supplements can lower blood pressure here.
A person who experiences an increased heart rate due to caffeine, alcohol, nicotine, or illegal stimulants should try reducing the amount they consume.
If a person is dependent on a particular drug, they should consider speaking to a healthcare worker or counselor to discuss treatment options.
If a person has a rapid heart rate after taking certain medications or supplements, they can speak to their doctor to see if there is an alternative medication they can take.
An increase in heart rate may occur during pregnancy. This can happen because the heart has to pump blood to the placenta and around the body.
Additionally, once a person goes through menopause, they have an increased risk of coronary heart disease. The British Heart Foundation notes that a person in the postmenopausal phase of their life may feel that their heart is racing.
Learn more about hormonal imbalance here.
A person who is pregnant or postmenopausal should speak with their doctor if they are concerned about their increased heart rate.
Learn about HRT here.
Electrolytes are minerals and salts in a person’s blood. Electrolytes help conduct electrical impulses around a person’s body.
A person who has an imbalance of electrolytes may notice they have an increased heart rate.
Learn how to manage an electrolyte imbalance here.
To diagnose an electrolyte imbalance, a doctor can perform an electrolyte test. An electrolyte test checks the levels of electrolytes in a person’s blood. The doctor can then recommend treatment based on what electrolyte levels are abnormal.
Learn which foods contain the most electrolytes here.
A fast heart rate is not usually a cause for concern. However, an increase in heart rate may indicate that a person has an underlying health problem. Health problems that can cause rapid heart rate include:
- overactive thyroid (hyperthyroidism)
- low blood sugar
- types of anemia
- postural or orthostatic hypotension, which is dizziness or low blood pressure caused by changing position
A person should speak to a doctor if:
- they have a history of heart problems
- the increased heart rate goes on for a long time or gets worse
- their increased heart rate is causing them concern
A person should seek immediate medical attention if they experience:
- shortness of breath
- dizziness or lightheadedness
- tightness in their chest
- chest pain
A person can experience an increased heart rate for many reasons. Certain conditions can cause a person to have a rapid heartbeat, but they are not usually serious.
If a person is concerned about their fast heart rate, they should speak to a doctor. A person should seek immediate medical help if they experience any troubling symptoms.