Your heart is hard at work pumping blood and nutrients throughout your body. You can sometimes hear it or even feel it as it pumps at a steady pace.
The heart keeps an even, reliable rhythm that's controlled by your body’s own electrical system. When that system has issues, the rhythm changes. This is known as arrhythmia, which is a problem with the heart's rhythm.
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Having an arrhythmia does not necessarily mean you have heart disease. There are many things that can cause your heart to flutter.
What Causes the Heart to Break Its Rhythm?
It’s possible to have a random arrhythmia even if your heart is healthy. If you do, talk to your doctor.
Arrhythmias are caused by:
Infection or fever
Physical or emotional stress
Diseases such as anemia or thyroid disease
Drugs and other stimulants, such as caffeine, tobacco, alcohol, cocaine, amphetamines, and certain over-the-counter and prescription medications
Some heart conditions
Symptoms of a Heart Rhythm Disorder
A typical heart will beat at 60 to 100 times per minute. It can beat faster if you need it to during exercise or in a stressful situation. It can slow down while you sleep. Your heart is used to slowing down and speeding up. This is normal.
When its rhythm is interrupted, you might not notice. Some people, however, can feel it when it happens.
Common symptoms include:
Palpitations, or "skipped beats"
Thumping or fluttering in the chest
Sensation of the heart racing
Other symptoms include:
Feeling faint or tired
Light-headedness or passing out
Shortness of breath
Chest pain or discomfort
It's possible you may experience the sensations described above and have no arrhythmias. These symptoms may be due to anxiety, stress, or other causes besides a problem with your heartbeat.
What’s Controlling Your Heartbeat?
There’s a node in the upper right section of your heart that monitors your body’s need for blood. It’s called the sinoatrial (SA) or sinus node, and it acts like a natural pacemaker.
It is the main control and source of each heartbeat. It can speed up your heart rate when you need it to speed up, such as during exercise or an illness or even when you feel happy.
Your SA node sends out electrical impulses across the heart. These cause the chambers to contract at specific times causing a heartbeat.