Sinus bradycardia can happen in connection with a number of factors. What are the most common causes of this symptom? Irritability, agitation or other personality changes.Dizziness, lightheadedness and fainting (syncope).Heart palpitations (the unpleasant feeling of your own heartbeat without feeling for your pulse).
This is especially true for people who’re very physically active and have sinus bradycardia because their hearts are more efficient.įor others, symptoms of sinus bradycardia may include: What are the symptoms of sinus bradycardia?įor most people, sinus bradycardia doesn’t cause any symptoms. That means their brain and body aren’t getting enough oxygen, and that lack is the usual driving force behind symptoms. Many people may not even know their heart rate is under 60 beats per minute unless they have a reason to check their pulse.įor people who have symptoms, sinus bradycardia is a sign that their body isn’t pumping enough blood. Most people with sinus bradycardia don’t have symptoms, making this a benign (harmless) condition. That means the true number is unknown, but is almost certainly much higher. However, most people with this condition don’t have symptoms, especially because it’s common in very active people. Sinus bradycardia with symptoms happens in about 1 out of every 600 adults over age 65. The better your vagus nerve works, the lower your resting heart rate. This nerve, which has a direct connection to your brain, is part of your autonomic nervous system. Regular exercise and training have a positive effect on your vagus nerve. Sinus bradycardia also happens normally to people who exercise regularly and are in very good physical condition. Sinus bradycardia is less likely to occur in children (but still possible in rare cases) unless it happens because of a condition that a child has when they’re born (congenital). Sinus bradycardia tends to happen in adults, especially those over age 65, as your heartbeat tends to naturally slow down as you age. Sinus rhythm means your sinus node is setting the tempo for your heartbeat, which is normal and expected. The SA node (also known as the sinus node) is your heart’s natural pacemaker and generates the electrical current that makes your heart muscle squeeze. Bradycardia comes from the Greek words “bradys,” meaning “slow,” and “kardia,” meaning “heart.” Sinus bradycardia means your heart is beating slowly but still using a sinus rhythm.ĭuring sinus rhythm, every heartbeat you have starts in the sinoatrial (SA) node, a cluster of electrically active cells near the top of your heart. The term “sinus bradycardia” breaks down based on the two words. Most people don’t have symptoms, but when symptoms do happen, it’s usually because your heart is pumping too slowly to supply your body with enough blood. It’s sometimes a symptom of certain heart conditions or problems, but it can also be a sign that a person is in very good shape because of regular exercise. Sinus bradycardia is a heart rhythm that’s slower than expected (fewer than 60 beats per minute in an adult) but is otherwise normal. An electrocardiogram example of sinus bradycardia.
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