{"id":52943,"date":"2025-04-25T22:09:44","date_gmt":"2025-04-26T02:09:44","guid":{"rendered":"https:\/\/www.hancockhealth.org\/mayo-health-library\/holter-monitor\/"},"modified":"2026-02-04T12:13:16","modified_gmt":"2026-02-04T17:13:16","slug":"holter-monitor","status":"publish","type":"mayo","link":"https:\/\/www.hancockhealth.org\/de\/mayo-health-library\/holter-monitor\/","title":{"rendered":"Holter monitor"},"content":{"rendered":"<div class=\"container mx-auto   wordpress-block wordpress- core-\">\n<p>A Holter monitor is a small, wearable device that records the heart&#8217;s rhythm, usually for 1 to 2 days. It&#8217;s used to spot irregular heartbeats, also called arrhythmias.<\/p>\n<p>A Holter monitor test may be done if a traditional electrocardiogram (ECG or EKG) doesn&#8217;t provide enough details about the heart&#8217;s condition.<\/p>\n<p>Some personal devices, such as smartwatches, offer electrocardiogram monitoring. Ask your healthcare professional if this is an option for you.<\/p>\n<p>You may need to use a Holter monitor if you have:<\/p>\n<ul>\n<li>Symptoms of an irregular heartbeat, also called arrhythmia.<\/li>\n<li>Fainting with no known cause.<\/li>\n<li>A heart condition that increases the risk of irregular heartbeats.<\/li>\n<\/ul>\n<p>Before you get a Holter monitor, you&#8217;ll have an electrocardiogram (ECG or EKG). An ECG is a quick and painless test. It uses sensors, called electrodes, taped to the chest to check the heart&#8217;s rhythm.<\/p>\n<p>A Holter monitor may be able to find irregular heartbeats that an ECG missed.<\/p>\n<p>If standard Holter monitoring doesn&#8217;t find an irregular heartbeat, you may need to wear a device called an event monitor. The device records heartbeats over several weeks.<\/p>\n<p>There are no significant risks involved in wearing a Holter monitor. Some people have minor discomfort or skin irritation where the sensors were placed.<\/p>\n<p>Holter monitors aren&#8217;t usually affected by other electrical appliances. But some devices may interrupt the signal from the electrodes to the Holter monitor. If you have a Holter monitor, avoid the following:<\/p>\n<ul>\n<li>Electric blankets.<\/li>\n<li>Electric razors and toothbrushes.<\/li>\n<li>Magnets.<\/li>\n<li>Metal detectors.<\/li>\n<li>Microwave ovens.<\/li>\n<\/ul>\n<p>Also, keep cellphones and portable music players at least 6 inches from the Holter monitor for the same reason.<\/p>\n<p>You are set up with a Holter monitor during a scheduled appointment at a medical office or clinic. Unless you&#8217;re told differently, plan to bathe before this appointment. Most monitors can&#8217;t be removed and must be kept dry once monitoring begins.<\/p>\n<p>Sticky patches with sensors, called electrodes, are placed on your chest. These sensors detect the heartbeat. They&#8217;re about the size of a silver dollar. If you have hair on your chest, some of it may be shaved to make sure the electrodes stick.<\/p>\n<p>Wires attached to the electrodes connect to the Holter monitor recording device. The device is about the size of a deck of cards.<\/p>\n<p>Once your Holter monitor is fitted and you&#8217;ve received instructions on how to wear it, you can return to everyday activities.<\/p>\n<h3>During<\/h3>\n<p>A Holter monitor is typically worn for 1 to 2 days. During that time, the device records all of the heartbeats.<\/p>\n<p>Holter monitoring is painless. The electrodes and wires can be hidden under clothing. The device is worn on a belt or attached to a strap.<\/p>\n<p>Don&#8217;t take the Holter monitor off. It must be worn during the entire recording period, even while sleeping.<\/p>\n<p>Water can damage a Holter monitor. Don&#8217;t swim, shower or bathe for the entire time you&#8217;re wearing a Holter monitor. If you have a wireless Holter monitor, you&#8217;ll be shown how to disconnect and reconnect the sensors and the monitor so that you can shower or bathe.<\/p>\n<p>While you wear a Holter monitor, you can do most other daily activities unless you have instructions to avoid certain things. You may be given a form to record your activities and any symptoms. It&#8217;s particularly important to note if and when you have any of the following symptoms:<\/p>\n<ul>\n<li>Pounding, fluttering or skipped heartbeats.<\/li>\n<li>Shortness of breath.<\/li>\n<li>Chest pain.<\/li>\n<li>Lightheadedness.<\/li>\n<\/ul>\n<p>Write down what activities you do and exactly what time you do them.<\/p>\n<h3>After<\/h3>\n<p>Once your monitoring period is over, you&#8217;ll return the device. If you were asked to keep a record of symptoms that you had while wearing the device, the Holter monitor&#8217;s data will be compared with your notes. This can help your care team make an accurate diagnosis.<\/p>\n<p>Your healthcare professional will review the Holter monitor test results and discuss them with you. Information from Holter monitor testing can show if you have a heart condition and if any heart medicines you currently take are or aren&#8217;t working.<\/p>\n<p>If you didn&#8217;t have any irregular heartbeats while you wore the monitor, you may need to wear a wireless Holter monitor or an event recorder. These devices can be worn longer than a standard Holter monitor. Event recorders are similar to Holter monitors and generally require you to push a button when you feel symptoms. There are several different types of event recorders.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>This wearable device keeps track of the heart&#8217;s rhythm during daily activities. Learn when you might need one and what to expect.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","tags":[1686,1687,1682,1684],"class_list":["post-52943","mayo","type-mayo","status-publish","hentry","tag-anatomical-structure","tag-medical-procedure","tag-person-group-concept","tag-theme-of-focus","content_type-tests-procedures"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Holter monitor - Hancock Health<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.hancockhealth.org\/de\/mayo-health-library\/holter-monitor\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Holter monitor - Hancock Health\" \/>\n<meta property=\"og:description\" content=\"This wearable device keeps track of the heart&#039;s rhythm during daily activities. 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