Dysrhythmia and arrhythmia are both terms doctors use to describe an abnormal heart rate. Types include bradyarrhythmia or supraventricular arrhythmia. Ventricular tachycardia VT causes the heart to beat at a rate of over beats per minute. VT causes include underlying heart disease. Learn more. Bradyarrhythmia means a slow heart rate with an arrhythmia. It is not always a cause for concern but may signal a serious underlying condition. Atrial fibrillation creates an irregular heart rhythm through electrical signal malfunctions.
Learn more about the causes and symptoms of the…. What to know about a slow heart rate. Medically reviewed by Gerhard Whitworth, R. Measuring heart rate. What are the causes? When to see a doctor. Treatment options. Exposure to air pollutants may amplify risk for depression in healthy individuals.
Costs associated with obesity may account for 3. Related Coverage. What are dysrhythmia and arrhythmia? Medically reviewed by Dr. Payal Kohli, M. This type of slow heart rate is often seen in healthy, athletic people. During a sinus pause, the heart may miss one or more beats because its natural pacemaker fails to activate the electrical system throughout the rest of the heart. Sick sinus syndrome happens when the normal pacemaker of the heart the sinus node does not work properly. Various irregular heart rates arrhythmias or combinations of arrhythmias can happen.
People with this syndrome can have slow arrhythmias or a combination of fast and slow arrhythmias. For more information, see Sick Sinus Syndrome. In tachy-brady syndrome, also called tachycardia-bradycardia syndrome, the heart sometimes beats too quickly tachy and sometimes beats too slowly brady.
This abnormal heart rhythm problem is often seen in people who have been diagnosed with atrial fibrillation. It can occur when the heart's natural pacemaker is damaged. Heart block refers to an abnormality in the way electricity passes through the normal electrical pathways of the heart. The abnormality "blocks" the electrical impulse from continuing through the normal pathways and usually results in a slower heart rate.
For more information, see Heart Block. Author: Healthwise Staff. Medical Review: E. Health Home Conditions and Diseases. What are the symptoms of bradycardia? Others may experience the following: Fainting syncope Dizziness Weakness or fatigue Disturbed sleep Babies with bradycardia may act sleepy and lack interest in feeding. Get the test you need: A safe MRI for people with pacemakers Most people with pacemakers and implanted defibrillators are told they are unable to have an MRI.
Read more. What causes bradycardia? Sick sinus syndrome Sick sinus syndrome occurs when the sinus node — the heart's natural pacemaker — doesn't reliably trigger every heartbeat. Risk factors for sick sinus syndrome include: Blood pressure medications Age over 70 Previous heart surgery Atherosclerosis Heart block Heart block occurs when the electrical signal that contracts the atria upper chambers of the heart doesn't always travel to the ventricles lower chambers.
If you have a low heart rate, you may feel worried. Rest assured that for a lot of people, bradycardia is a normal heart rate. Other times, though, it can be a sign of a medical condition that needs treatment. So, if you experience symptoms like light-headedness, fatigue, fainting, shortness of breath, or chest pain, be sure to have it evaluated.
Get our printable guide for your next doctor's appointment to help you ask the right questions. Did you know the most common forms of heart disease are largely preventable? Our guide will show you what puts you at risk, and how to take control of your heart health.
Mitchell LB. Overview of arrhythmias. Merck Manual. Updated July Association of asymptomatic bradycardia with incident cardiovascular disease and mortality: The multi-ethnic study of atherosclerosis MESA. Incidence of and risk factors for sick sinus syndrome in the general population. J Am Coll Cardiol. American Heart Association. Bradycardia: slow heart rate. Reviewed September 30, Cleveland Clinic. Reviewed May 7, Antzelevitch C, Burashnikov A.
Overview of basic mechanisms of cardiac arrhythmia. Cardiac Electrophysiology Clinics. Atrioventricular block. In: Fogoros RN. Electrophysiologic Testing. Sidhu S, Marine JE. Evaluating and managing bradycardia. Trends in Cardiovascular Medicine. Your Privacy Rights. To change or withdraw your consent choices for VerywellHealth. At any time, you can update your settings through the "EU Privacy" link at the bottom of any page.
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