Conclusion
There are many types of arrhythmias. Although some may arise from life-threatening conditions, most are harmless. Most arrhythmias do not show symptoms. If you experience symptoms, it does not mean the cause is serious but you should see a doctor anyway.
References:
[1] https://my.clevelandclinic.org/health/diseases/17084-heart-palpitations
[2] https://www.mayoclinic.org/diseases-conditions/heart-arrhythmia/symptoms-causes/syc-20350668
[3] https://www.mayoclinic.org/diseases-conditions/heart-arrhythmia/symptoms-causes/syc-20350668
[4] https://www.heart.org/en/health-topics/arrhythmia/symptoms-diagnosis–monitoring-of-arrhythmia
[5] https://www.healthline.com/health/what-does-shortness-of-breath-feel-like
[6] https://www.heartandstroke.ca/heart-disease/conditions/arrhythmia
[7] https://www.webmd.com/heart-disease/atrial-fibrillation/heart-disease-abnormal-heart-rhythm
[8] https://www.heartandstroke.ca/heart-disease/conditions/arrhythmia
[9] https://www.mayoclinic.org/diseases-conditions/heart-arrhythmia/symptoms-causes/syc-20350668
[10] https://www.healthline.com/health/high-potassium/cardiovascular-disease-and-high-potassium
[11] https://www.mayoclinic.org/diseases-conditions/sleep-apnea/symptoms-causes/syc-20377631
[12] https://www.mayoclinic.org/diseases-conditions/heart-arrhythmia/symptoms-causes/syc-20350668
[13] https://www.medicinenet.com/thyroid_disorders/article.htm
[14] https://www.mayoclinic.org/diseases-conditions/heart-arrhythmia/symptoms-causes/syc-20350668
[15] https://www.mayoclinic.org/diseases-conditions/heart-arrhythmia/symptoms-causes/syc-20350668
[16] https://www.mayoclinic.org/diseases-conditions/heart-arrhythmia/symptoms-causes/syc-20350668