{"id":1599,"date":"2010-03-12T18:19:39","date_gmt":"2010-03-12T12:49:39","guid":{"rendered":"http:\/\/www.pgblazer.com\/?p=1599"},"modified":"2024-02-12T15:43:47","modified_gmt":"2024-02-12T10:13:47","slug":"pulsus-paradoxus","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/general\/pulsus-paradoxus\/","title":{"rendered":"Pulsus paradoxus"},"content":{"rendered":"<h2><span style=\"color: #008000;\">Pulsus paradoxus<\/span><\/h2>\n<ul>\n<li>Refers to the decrease in systolic blood pressure by more than 10 mm Hg during inspiration<\/li>\n<li>Seen in\n<ul>\n<li>Cardiac tamponade<\/li>\n<li>Effusive constrictive pericarditis<\/li>\n<li>Obstructive pulmonary disease<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>The reason for the decrease in systolic blood pressure during inspiration is explained in this article : <a href=\"http:\/\/www.pgblazer.com\/2010\/03\/inspiratory-decrease-in-systolic-blood-pressure-and-pulse-volume-mechanism.html\">Inspiratory decrease in systolic blood pressure and pulse volume \u2013 Mechanism<\/a><\/p>\n<h4><span style=\"color: #0000ff;\"><strong>Mechanism of pulsus paradoxus:<\/strong><\/span><\/h4>\n<ol>\n<li>In cardiac tamponade\n<ul>\n<li>Tense fluid in the pericardial sac impairs ventricular filling<\/li>\n<li>Also, the negative intrathoracic pressure is not well transmitted to the pericardial sac<\/li>\n<li>Fall in pulmonary venous pressure is more than the fall in left atrial pressure<\/li>\n<li>Hence filling of the left atrium and in turn the left ventricle is decreased resulting in decrease in stroke volume more than normal<\/li>\n<\/ul>\n<\/li>\n<li>In obstructive pulmonary disease\n<ul>\n<li>There is exaggeration of the inspiratory decrease in intrathoracic pressure<\/li>\n<li>Hence the fall in stroke volume and blood pressure is more<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h4><span style=\"color: #0000ff;\"><strong>What is the paradox?<\/strong><\/span><\/h4>\n<p>Pulsus paradoxus is an exaggeration of the normal variation in the systolic blood pressure and hence it is not truly paradoxical. Some say it is the absence of pulse when heart sounds are audible, though muffled.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pulsus paradoxus Refers to the decrease in systolic blood pressure by more than 10 mm Hg during inspiration Seen in Cardiac tamponade Effusive constrictive pericarditis Obstructive pulmonary disease The reason for the decrease in systolic blood pressure during inspiration is explained in this article : Inspiratory decrease in systolic blood pressure and pulse volume \u2013 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21525,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[7],"tags":[182,239,323,943,976,1124],"class_list":["post-1599","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general","tag-blood-pressure","tag-cardiac-tamponade","tag-constrictive-pericarditis","tag-negative-intrathoracic-pressure","tag-obstructive-pulmonary-disease","tag-pulsus-paradoxus"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pulsus paradoxus - What is the paradox? - What is the mechanism?<\/title>\n<meta name=\"description\" content=\"Pulsus paradoxus: It refers to the decrease in the systolic blood pressure by more than 10 mm Hg during inspiration. 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