What is Bradycardia (Slow Heartbeat)?
Bradycardia (slow heartbeat) means rapid heartbeat. The normal heart rate of an adult sitting still should be around 60-100 beats per minute.
In the presence of bradycardia, the pulse is below 60. Bradycardia does not cause any problems or complaints in some people.
Sometimes it can have serious consequences. It is important to consult a specialist as a low pulse may be caused by a problem in the electrical systems in the heart.
What are The Causes of Bradycardia?
Many different conditions can cause bradycardia, and sometimes it can be a symptom of a serious heart problem.
Causes of bradycardia vary and may include the following factors:
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Sinus Node Problems:
Problems in the sinoatrial (SA) node, the heart’s natural pacemaker, can cause slow heartbeats. Problems in the conduction pathways of this node that prevent the electrical impulses from passing properly to the ventricles can also cause bradycardia.
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Metabolic Problems:
Metabolic problems can also contribute to bradycardia. In particular, hypothyroidism (low thyroid hormone levels) can decrease heart rate. Aging and
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Heart Disease:
Damage to heart tissue may occur during the aging process or in the presence of heart diseases. This can lead to slow heart rate and bradycardia.
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Medicines:
Some heart medications can have side effects that can cause bradycardia. Tranquilizers, opioids, and medications used to treat some mental health disorders can also cause bradycardia.
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Heart Diseases:
A heart defect present at birth (congenital heart defect), an infection of the heart tissue known as myocarditis, or a complication of heart surgery can also lead to bradycardia.
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Electrolyte Imbalances:
Imbalance of potassium, calcium and other electrolytes in the blood can affect heart rate and cause bradycardia. Sleep Apnea and Inflammatory
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Diseases:
Repeated breathing pauses during sleep, known as obstructive sleep apnea, can cause bradycardia. Additionally, inflammatory diseases such as rheumatic fever or lupus can also cause bradycardia.
While bradycardia is a medical condition, it can also be a symptom of another disease. Therefore, the treatment of bradycardia may vary depending on its cause.
What are The Symptoms of Bradycardia (Slow Heartbeat)?
Bradycardia may be asymptomatic for some people, but a variety of symptoms may occur in others.
Symptoms of bradycardia include:
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Shortness of Breath:
When the heart rate decreases, it may not pump enough blood throughout the body and therefore the distribution of oxygen and nutrients may be affected. In this case, shortness of breath and a feeling of rapid breathing may occur.
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Fatigue and Weakness:
When the heart rate decreases, the distribution of oxygen and nutrients in the body may decrease, resulting in a feeling of fatigue and weakness.
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Headache:
Bradycardia can cause blood pressure to drop and headaches may occur.
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Feeling of Falling:
Bradycardia can affect the distribution of oxygen and nutrients in the body, and therefore the feeling of falling may occur.
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Loss of Appetite and Weight Loss:
Bradycardia can affect the distribution of oxygen and nutrients in the body, resulting in loss of appetite and weight loss.
Symptoms of bradycardia may vary from person to person, so evaluation by doctors is important.
If symptoms of bradycardia occur or the heart rate is below normal, it is recommended to consult a doctor.
How to Diagnose Bradycardia (Slow Heartbeat)?
Diagnosing bradycardia can be difficult in some cases. The reason for this is that the individual’s pulse is not low at all times. The specialist measures the electrical state that occurs during the beating of the heart using the ECG method. If there are no signs of bradycardia during the measurement, but there are signs of bradycardia, a Holter ECG device is attached to examine the heart for 1 day. With this device, the electrical activity of the heart is measured for 1 day. If the symptoms match the Holter ECG recordings, bradycardia is diagnosed.
Bradycardia Treatment
Once a definitive diagnosis is made, the treatment phase begins quickly. Your doctor prepares a bradycardia treatment plan depending on why it develops. Generally, if you have bradycardia but do not show any symptoms, no treatment is required.
At this point, your doctor may give you some recommendations for lifestyle changes. However, if bradycardia causes dangerously low blood pressure, drug therapy may be applied.
These medications can be taken intravenously or orally for daily use, depending on the situation. However, if these treatment plans do not work and your condition is serious enough to damage organs, your doctor may recommend using a pacemaker. There are two types of pacemakers.
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Temporary Pacemaker:
It is a device that comes into contact with the skin of the chest and contains adhesive electrical contacts. With its contacts, it allows electrical current to enter the patient’s body and the heart to beat in a normal rhythm. It may be a suitable option for people who need it until the underlying cause of bradycardia is treated.
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Permanent Pacemaker:
It is a permanent treatment option. It is especially preferred in cases where the heart’s natural electrical system does not work properly or sinus syndrome. You will need this device until the doctor’s next recommendation.
After your pacemaker is installed, your doctor or a member of the healthcare team will give you detailed information about how it works and how you should use it.
You Can Take These Precautions to Avoid Experiencing Bradycardia
Bradycardia is a health problem that can affect the distribution of oxygen and nutrients in the body, and therefore it is recommended to take the following precautions to avoid experiencing bradycardia:
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Regular Physical Activity:
Regular physical activity is important for protecting heart health and regulating heart rate. Daily light or moderate exercise can reduce the risk of bradycardia by regulating the heart rate.
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A Healthy Diet:
A healthy diet is important for protecting heart health and regulating heart rate. It is especially recommended to avoid foods high in salt, carbohydrates, fat and cholesterol.
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Stress Management:
Stress can affect heart rate. Therefore, stress management is important. Stress management techniques include meditation, relaxation exercises and regular exercise.
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Use Medications Regularly:
If medication is used to treat bradycardia, it is important to use it at the dose and frequency recommended by the doctor. Using medications regularly can reduce the risk of bradycardia.
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Following Doctor’s Recommendations:
It is important to identify the causes of bradycardia and determine the correct treatment options. Following doctor’s recommendations can reduce the risk of bradycardia.
These measures can be useful to avoid experiencing bradycardia, but may vary depending on the causes of bradycardia. Therefore, it is important to follow the doctor’s recommendations.
Bradycardia (Slow Heartbeat): Essential Questions & Answers
What is considered a dangerously low heart rate?
Bradycardia is typically defined as a resting heart rate of fewer than 60 beats per minute (BPM). While a low heart rate isn’t always a cause for concern—such as in elite athletes—it becomes dangerous when the heart cannot pump enough oxygen-rich blood to the body.
A heart rate consistently below 40-50 BPM, especially when accompanied by symptoms like fainting or chest pain, is often considered a medical emergency requiring immediate evaluation.
What are the most common symptoms of bradycardia?
Many people with bradycardia do not experience symptoms. However, if the brain and other organs aren’t getting enough oxygen, you may notice:
- Dizziness or lightheadedness
- Fainting (syncope) or near-fainting spells
- Extreme fatigue or lack of energy
- Shortness of breath (especially during physical activity)
- Chest pains or palpitations
- Confusion or difficulty concentrating
Is a slow heart rate always a sign of a heart problem?
No, a slow heart rate is not always pathological. In many cases, it is a sign of high cardiovascular fitness. Highly trained athletes often have resting heart rates in the 40s or 50s because their heart muscle is so efficient it doesn’t need to beat as often to circulate blood.
Additionally, heart rates naturally slow down during deep sleep. Bradycardia only becomes a “problem” when it is symptomatic or caused by an underlying electrical issue in the heart.
What causes a slow heartbeat in older adults?
As people age, the heart’s natural pacemaker (the sinoatrial node) can wear down, or the electrical pathways can develop scarring. Common causes include:
- Heart Tissue Damage: Resulting from aging, heart disease, or a previous heart attack.
- Hypothyroidism: An underactive thyroid gland can slow many bodily functions, including heart rate.
- Medications: Certain drugs for high blood pressure or arrhythmias (like beta-blockers) can lower heart rate.
- Electrolyte Imbalance: Abnormal levels of potassium or calcium in the blood.
How is bradycardia treated and is a pacemaker always necessary?
Treatment depends entirely on the cause and the severity of symptoms. If the bradycardia is caused by a medication or an underlying condition like hypothyroidism, treating that issue may resolve the slow heart rate.
However, if the slow heart rate is caused by damage to the heart’s electrical system and symptoms are severe, a permanent pacemaker is the standard treatment. A pacemaker is a small device implanted under the skin that sends electrical impulses to the heart to maintain a healthy rhythm.
