{"id":21348,"date":"2016-05-17T09:13:05","date_gmt":"2016-05-17T03:43:05","guid":{"rendered":"https:\/\/cardiophile.org\/?p=21348"},"modified":"2021-12-20T22:45:07","modified_gmt":"2021-12-20T17:15:07","slug":"concertina-effect-cardiology-mcq","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/concertina-effect-cardiology-mcq\/","title":{"rendered":"Concertina effect – Cardiology MCQ"},"content":{"rendered":"

Concertina effect is seen in:<\/strong>
\na) WPW syndrome
\nb) Deployed stents
\nc) Both of the above
\nd) None of the above
\nCorrect answer: c) Both of the above<\/strong>
\nConcertina effect in WPW Syndrome<\/em><\/strong>
\nVarying QRS width in WPW syndrome due to varying degrees of pre-excitation is known as concertina effect in WPW syndrome. The more the pre-excitation, the shorter the PR interval and wider the QRS duration.
\nProgressive decrease\u00a0in PR interval with reciprocal increase in QRS width due to changing degree of pre-excitation has been termed concertina effect in WPW syndrome. It may be noted that the PJ interval (from the beginning of P wave to the end of QRS remains constant.1<\/sup> It has been mentioned that those manifesting concertina effect is likely to have higher accessory pathway refractory period.2<\/sup>
\nConcertina effect with stents<\/strong><\/em>
\nConcertina effect is longitudinal deformation of the proximal segments of a deployed due to force from the guide catheter or other equipment.3<\/sup>
\nReferences<\/strong><\/p>\n

    \n
  1. Giraud G, Latou H, Puech P, RouJon J. Rhythm disorders of the WPW syndrome, endocavitary electrocardiographic analysis. Montpellier Med. 49: 101, 1956.<\/li>\n
  2. Singla V, Singh B, Singh Y, Ravindranath KS. Concertina effect: a subtle but specific marker.\u00a0BMJ Case Rep. 2013 Apr 30;2013. pii: bcr2013009328. doi: 10.1136\/bcr-2013-009328.<\/li>\n
  3. Foin N, Di Mario C, Francis DP, Davies JE. Stent flexibility versus concertina effect: mechanism of an unpleasant trade-off in stent design and its implications for stent selection in the cath-lab.\u00a0Int J Cardiol. 2013 Apr 15;164(3):259-61.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    Concertina effect is seen in:
    \na) WPW syndrome
    \nb) Deployed stents
    \nc) Both of the above
    \nd) None of the above<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[3,5],"tags":[],"class_list":["post-21348","post","type-post","status-publish","format-standard","hentry","category-cardiology-mcq","category-dm-dnb-cardiology-entrance"],"yoast_head":"\nConcertina effect - Cardiology MCQ - 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\/concertina-effect-cardiology-mcq\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Concertina effect - Cardiology MCQ - All About Cardiovascular System and Disorders\" \/>\n<meta property=\"og:description\" content=\"Concertina effect is seen in: a) WPW syndrome b) Deployed stents c) Both of the above d) None of the above\" \/>\n<meta property=\"og:url\" content=\"https:\/\/johnsonfrancis.org\/professional\/concertina-effect-cardiology-mcq\/\" \/>\n<meta property=\"og:site_name\" content=\"All About Cardiovascular System and Disorders\" \/>\n<meta property=\"article:published_time\" content=\"2016-05-17T03:43:05+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-12-20T17:15:07+00:00\" \/>\n<meta name=\"author\" content=\"Johnson Francis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Johnson Francis\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/concertina-effect-cardiology-mcq\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/concertina-effect-cardiology-mcq\\\/\"},\"author\":{\"name\":\"Johnson Francis\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"headline\":\"Concertina effect – Cardiology MCQ\",\"datePublished\":\"2016-05-17T03:43:05+00:00\",\"dateModified\":\"2021-12-20T17:15:07+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/concertina-effect-cardiology-mcq\\\/\"},\"wordCount\":242,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/#\\\/schema\\\/person\\\/5441d907049b914770f4bd98fb57feec\"},\"articleSection\":[\"Cardiology MCQ\",\"DM \\\/ DNB Cardiology Entrance\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/concertina-effect-cardiology-mcq\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/concertina-effect-cardiology-mcq\\\/\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/professional\\\/concertina-effect-cardiology-mcq\\\/\",\"name\":\"Concertina effect - 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