{"id":9362,"date":"2012-06-20T02:19:43","date_gmt":"2012-06-20T02:19:43","guid":{"rendered":"http:\/\/www.cardiophile.org\/common\/?p=8333"},"modified":"2023-05-14T08:18:11","modified_gmt":"2023-05-14T02:48:11","slug":"what-is-chronotropic-reserve","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/what-is-chronotropic-reserve\/","title":{"rendered":"What is chronotropic reserve?"},"content":{"rendered":"<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/txmoOkMQhBM\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen=\"\"><\/iframe><\/p>\n<h2><span style=\"color: #008000;\">What is chronotropic reserve?<\/span><\/h2>\n<p>The capacity to increase the heart rate with exercise or other metabolic demands is known as chronotropic reserve. If the heart is unable to increase it as per demand, it is known as chronotropic incompetence. This occurs in sick sinus syndrome as well as during treatment with medicines which suppress the sinus node like beta blockers. Chronotropic reserve can also be reduced if the resting heart rate is already increased due to overactivity of the sympathetic nervous system as in heart failure or hyperthyroidism. Hyperthyroidism is increased activity of the thyroid gland, producing excessive amounts of hormone thyroxine.<\/p>\n<p style=\"text-align: center;\">\n","protected":false},"excerpt":{"rendered":"<p>The capacity to increase the heart rate with exercise or other metabolic demands is known as chronotropic reserve. <\/p>\n","protected":false},"author":1,"featured_media":35107,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[11],"tags":[],"class_list":["post-9362","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-heart-disease-faq"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is chronotropic reserve? - All About Cardiovascular System and Disorders<\/title>\n<meta name=\"description\" content=\"The capacity to increase the heart rate with exercise or other metabolic demands is known as chronotropic reserve.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/johnsonfrancis.org\/professional\/what-is-chronotropic-reserve\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is chronotropic reserve? 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