Though it is an understandable mistake, sinus arrhythmia has nothing to do with the nose. Rather, the term refers to the sinoatrial or sinus node in the heart. Like a clock, the heart ticks at regular intervals like a second-hand. Any deviation from this constant rhythm is an arrhythmia. The sinoatrial node is essentially the heart’s natural pacemaker, helping keep the heartbeat steady. Sinus arrhythmia is an irregularity in the heart’s rhythm, originating in the sinoatrial.


1. Respiratory Sinus Arrhythmia

There are different types of sinus arrhythmia, but the most common affects breathing. In a person with respiratory sinus arrhythmia, the heart’s rhythm changes when breathing in and out. Inhaling causes the heart rate to increase while exhaling causes it to decrease. This type of sinus arrhythmia is common in children. As the heart is still growing, there are often slight fluctuations in the beats. The condition tends to disappear as the child's physiology matures.

heartbeat clock respiratory sinus arrhythmia Wavebreakmedia Ltd / Getty Images

More on Facty Health


This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.