Your heart follows a carefully coordinated electrical system to maintain a steady rhythm. But sometimes those electrical signals become too fast, too slow or irregular. This condition is known as arrhythmia.
Some rhythm changes may be harmless, while others can require medical evaluation and treatment.
What Is an Arrhythmia?
An arrhythmia occurs when the heart’s electrical signals do not work normally. The result may be a heartbeat that races, slows down or becomes uneven.
People may notice sensations such as fluttering, pounding, racing or skipped beats. However, some arrhythmias can occur without obvious symptoms.
Fast Heart Rhythms
Supraventricular tachycardia (SVT) is a rapid rhythm that begins above the heart’s ventricles. Episodes can start suddenly and may cause palpitations, dizziness, breathlessness or chest discomfort.
Another important condition is atrial fibrillation (AFib), in which the upper chambers of the heart beat irregularly. It is particularly important because it can increase the risk of blood clots and stroke.
When the Heart Beats Too Slowly
A slow heart rate is called bradycardia. A resting rate below 60 beats per minute does not automatically mean there is a health problem; it can occur normally in some physically fit people.
It becomes more concerning when the slow rhythm causes symptoms such as unusual tiredness, dizziness, fainting or reduced ability to exercise.
What About Skipped Beats?
That sudden sensation that the heart has “skipped” a beat can sometimes actually be an extra or premature heartbeat.
These beats are often harmless, but factors including stress, fatigue and stimulants such as caffeine can make them more noticeable. Frequent premature ventricular beats may need medical assessment.
The More Serious Rhythms
Some arrhythmias begin in the heart’s lower chambers. Ventricular tachycardia, for example, can be particularly dangerous, especially in people with existing structural heart disease or previous heart problems.
In severe cases, dangerous ventricular rhythms can interfere with the heart’s ability to pump blood and may lead to cardiac arrest.
When Should You Get Checked?
Persistent or recurring palpitations should not simply be ignored, particularly when they occur with dizziness, fainting, chest pain or breathing difficulty.
Doctors may use tests such as an ECG, Holter monitoring or other rhythm monitoring to identify an abnormal heartbeat. An echocardiogram may also be considered when structural heart disease needs to be assessed.
Don’t Panic, But Don’t Ignore It
An irregular heartbeat does not always indicate a serious heart condition. The important step is determining which type of arrhythmia is present and why it is occurring.
If unusual heartbeat symptoms keep returning or are accompanied by serious symptoms, medical evaluation is the safest approach. Early identification can help doctors decide whether monitoring, lifestyle changes, medication or another treatment is appropriate