by Rosalyn Carson-DeWitt, MD
The heart should work in a regular, steady pattern. Arrhythmias are breaks in the pattern. It may happen in a short burst or last over long periods of time.
Types of arrhythmias:
Most will not affect overall health. Some arrhythmias can slow the flow of blood to the body or increase the risk of other health problems such as stroke.
The action of the heart is controlled by an electrical signal. The signal starts in a group of cells called the sinoatrial (SA) node and moves from the top to the bottom of the heart. The heart will contract first in the upper areas of the heart called the atria and then the lower areas of the heart called the ventricles. Arrhythmias may occur if:
Risk Factors TOP
Factors that may increase your chances of arrhythmias:
Not all arrhythmias will cause symptoms. Some arrhythmias may be felt as a fluttering in the chest, skipped heartbeat, or fast heartbeat.
Arrhythmias that slow the flow of blood through the heart will also slow the flow of blood to the body. If the flow is slowed enough it can lead to:
The doctor will ask about your symptoms, medical history, and family history. A physical exam will be done including listening to your heart, taking your pulse, and looking for any signs of heart problems.
The electrical activity will be checked with one of the following:
To help find what may be causing problems or to look for problems of the heart structure the doctor may also order:
Not all arrhythmias need to be treated. Many are harmless and will not cause problems. When arrhythmias cause symptoms serious enough to affect your daily life or increase the risk of other conditions, treatment may be needed. The goal of treatment is to return your heart to a normal rhythm. The type of treatment will depend on your specific arrhythmia and your overall health. Options include:
Not all arrhythmias can be prevented. To help reduce your chances of certain arrhythmias:
American Heart Association
Heart Rhythm Society
Canadian Heart Rhythm Society
Heart and Stroke Foundation of Canada
Arrhythmias. American Heart Association website. Available at:
...(Click grey area to select URL)
Accessed November 28, 2017.
Arrhythmia. Texas Heart Institute website. Available at:
...(Click grey area to select URL)
Updated August 2016. Accessed November 28, 2017.
Atrial fibrillation. EBSCO DynaMed Plus website. Available at: http://www.dynamed.com/topics/dmp~AN~T115288/Atrial-fibrillation . Updated July 31, 2017. Accessed November 28, 2017.
Explore arrhythmia. National Heart, Lung, and Blood website. Available at: https://www.nhlbi.nih.gov/health/health-topics/topics/arr. Updated July 1, 2011. Accessed November 28, 2017.
Sick sinus syndrome. EBSCO DynaMed Plus website. Available at: http://www.dynamed.com/topics/dmp~AN~T113692/Sick-sinus-syndrome . Updated December 8, 2015. Accessed November 28, 2017.
Ventricular arrhythmias. EBSCO DynaMed Plus website. Available at: http://www.dynamed... . Updated March 31, 2017. Accessed November 28, 2017.
Last reviewed November 2018 by EBSCO Medical Review Board Michael J. Fucci, DO, FACC
Last Updated: 12/20/2014
EBSCO Information Services is fully accredited by URAC. URAC is an independent, nonprofit health care accrediting organization dedicated to promoting health care quality through accreditation, certification and commendation.
This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.
To send comments or feedback to our Editorial Team regarding the content please email us at firstname.lastname@example.org. Our Health Library Support team will respond to your email request within 2 business days.