{"id":22754,"date":"2017-12-22T18:34:00","date_gmt":"2017-12-22T13:04:00","guid":{"rendered":"https:\/\/cardiophile.org\/?p=22754"},"modified":"2022-01-26T08:30:00","modified_gmt":"2022-01-26T03:00:00","slug":"pr-segment-depression-and-pr-st-dissociation","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/pr-segment-depression-and-pr-st-dissociation\/","title":{"rendered":"PR segment depression and PR-ST dissociation"},"content":{"rendered":"<h2 align=\"LEFT\"><span style=\"color: #008000;\"><strong>PR segment depression and PR-ST dissociation<\/strong><\/span><\/h2>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/k15A6tl2EuY\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p align=\"LEFT\"><span style=\"color: #000000;\">PR segment depression can occur in pericarditis and atrial infarction. Dissociation between PR and ST segments (PR-ST dissociation) can occur in pericarditis.<\/span><\/p>\n<figure id=\"attachment_52924\" aria-describedby=\"caption-attachment-52924\" style=\"width: 1200px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-52924\" src=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2017\/12\/PR-segment-depression.jpg\" alt=\"PR segment depression\" width=\"1200\" height=\"928\" srcset=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2017\/12\/PR-segment-depression.jpg 1200w, https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2017\/12\/PR-segment-depression-300x232.jpg 300w, https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2017\/12\/PR-segment-depression-1024x792.jpg 1024w, https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2017\/12\/PR-segment-depression-768x594.jpg 768w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption id=\"caption-attachment-52924\" class=\"wp-caption-text\">PR segment depression<\/figcaption><\/figure>\n<p align=\"LEFT\"><span style=\"color: #000000;\">In inferior wall infarction with which atrial infarction is usually associated, there can be ST elevation and PR depression in inferior leads. <\/span><\/p>\n<figure id=\"attachment_52925\" aria-describedby=\"caption-attachment-52925\" style=\"width: 1200px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-52925\" src=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2017\/12\/PR-ST-dissociation.jpg\" alt=\"PR-ST dissociation\" width=\"1200\" height=\"903\" srcset=\"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2017\/12\/PR-ST-dissociation.jpg 1200w, https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2017\/12\/PR-ST-dissociation-300x226.jpg 300w, https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2017\/12\/PR-ST-dissociation-1024x771.jpg 1024w, https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2017\/12\/PR-ST-dissociation-768x578.jpg 768w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><figcaption id=\"caption-attachment-52925\" class=\"wp-caption-text\">PR-ST dissociation<\/figcaption><\/figure>\n<p align=\"LEFT\"><span style=\"color: #000000;\">Jim MH et evaluated the prognostic implication of PR segment depression in inferior leads in acute inferior wall infarction [1]. They noted profound PR segment depression (1.2 mm or more) in 9 of 463 consecutive patients presenting with inferior wall myocardial infarction. They noted that patients with atrial ischemia as indicated by PR segment depression tended to present earlier and had a higher frequency of first degree AV block and supraventricular arrhythmias. They noted higher incidence of cardiac free wall rupture and in hospital mortality, which had a high statistical significance \u2013 p=0.001 and 0.015 respectively. Lu ML and colleagues found that PR segment depression in inferior leads was associated with increased one year mortality patients with ST elevation myocardial infarction [2].<\/span><\/p>\n<p align=\"LEFT\"><span style=\"color: #000000;\">PR segment depression was noted in 45.5% of 79 patients with pericardial disease referred for surgery [3]. They noted that PR segment depression was associated with elevated inflammatory markers, purulent content of pericardial fluid, calcification, features of compression \u2013 either tamponade or constriction, arrhythmias and unfavorable outcome.<\/span><\/p>\n<p align=\"LEFT\"><span style=\"color: #000000;\">Asymptomatic pericardial effusion can also be associated with PR segment depression according to Kudo Y et al [4]. PR segment depression was noted in 40 of their 176 asymptomatic patients referred for echocardiography. ST elevation was noted in 8 of these patients (PR-ST dissociation).<\/span><\/p>\n<p align=\"LEFT\"><span style=\"color: #0000ff;\"><b>References<\/b><\/span><\/p>\n<ol>\n<li>\n<p align=\"LEFT\"><span style=\"color: #000000;\">Jim MH et al. Prognostic implications of PR-segment depression in inferior leads in acute inferior myocardial infarction. Clin Cardiol. 2006 Aug;29(8):363-8.<\/span><\/p>\n<\/li>\n<li>\n<p align=\"LEFT\"><span style=\"color: #000000;\">Lu ML et al. Prognostic significance of abnormal P wave morphology and\u00a0PR-segment\u00a0displacement after ST-elevation myocardial infarction. Int J Cardiol.\u00a02015 Oct 15;197:216-21.<\/span><\/p>\n<\/li>\n<li>\n<p align=\"LEFT\"><span style=\"color: #000000;\">Kudaiberdiev T et al. Electrocardiographic abnormalities in patients with pericardial disease&#8211;Association of\u00a0PR\u00a0segment\u00a0depression\u00a0with arrhythmias and clinical signs: Experience of cardiac surgery center. J Electrocardiol.\u00a02016 Jan-Feb;49(1):29-36.<\/span><\/p>\n<\/li>\n<li>\n<p align=\"LEFT\"><span style=\"color: #000000;\">Kudo Y et al. Clinical correlates of\u00a0PR-segment\u00a0depression\u00a0in asymptomatic patients with pericardial effusion. J Am Coll Cardiol.\u00a02002 Jun 19;39(12):2000-4.<\/span><\/p>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>PR segment depression and PR-ST dissociation PR segment depression can occur in pericarditis and atrial infarction. Dissociation between PR and ST segments (PR-ST dissociation) can occur in pericarditis. In inferior wall infarction with which atrial infarction is usually associated, there can be ST elevation and PR depression in inferior leads. Jim MH et evaluated the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":52925,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[6],"tags":[],"class_list":["post-22754","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ecg-electrophysiology"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PR segment depression and PR-ST dissociation - All About Cardiovascular System and Disorders<\/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:\/\/johnsonfrancis.org\/professional\/pr-segment-depression-and-pr-st-dissociation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PR segment depression and PR-ST dissociation - All About Cardiovascular System and Disorders\" \/>\n<meta property=\"og:description\" content=\"PR segment depression and PR-ST dissociation PR segment depression can occur in pericarditis and atrial infarction. Dissociation between PR and ST segments (PR-ST dissociation) can occur in pericarditis. In inferior wall infarction with which atrial infarction is usually associated, there can be ST elevation and PR depression in inferior leads. 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