{"id":31057,"date":"2020-04-13T15:47:23","date_gmt":"2020-04-13T10:17:23","guid":{"rendered":"https:\/\/johnsonfrancis.org\/professional\/?p=31057"},"modified":"2020-04-13T15:47:23","modified_gmt":"2020-04-13T10:17:23","slug":"tissue-doppler-derived-atrial-conduction-time-pa-tdi","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/professional\/tissue-doppler-derived-atrial-conduction-time-pa-tdi\/","title":{"rendered":"Tissue Doppler derived atrial conduction time: PA-TDI"},"content":{"rendered":"<h2><span style=\"color: #008000;\">Tissue Doppler derived atrial conduction time: PA-TDI<\/span><\/h2>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/56KTOIVU0rQ\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"><\/iframe><\/p>\n<p>Total atrial conduction time (TACT) denotes the total period required for atrial activation. Conventionally it is measured using signal averaged electrocardiogram (SA-ECG) as the maximal P wave duration. It has been shown to be powerful predictor of atrial fibrillation. A simpler method which can be done in any echocardiography laboratory without the use of SA-ECG is a<a href=\"https:\/\/johnsonfrancis.org\/professional\/tissue-doppler-imaging-tdi\/\"> tissue Doppler<\/a> and surface ECG combined measurement of atrial activation. PA-TDI is measured from the onset of the P wave on surface ECG to the tissue Doppler derived peak of A wave at the lateral left atrial wall). PA-TDI has been shown to predict new onset atrial fibrillation (AF), recurrence of AF after ablation, AF after acute myocardial infarction and even AF after cardiac surgery [1]. Cardiac surgeries in which PA-TDI has been successfully used to predict AF include coronary artery bypass grafting (CABG), aortic valve replacement (AVR) for aortic stenosis [2] and surgery for mitral regurgitation [3].<\/p>\n<p>In mitral regurgitation, prediction of AF is very important as the left atrium is very large. Onset of AF after relief of mitral regurgitation jet which has a cleansing action on the left atrium may lead to thrombus formation and increase the risk of stroke and other systemic embolism [1].<\/p>\n<p><strong><span style=\"color: #0000ff;\">References<\/span><\/strong><\/p>\n<ol>\n<li>Yuasa T, Imoto Y. <a href=\"https:\/\/www.jstage.jst.go.jp\/article\/circj\/80\/1\/80_CJ-15-1256\/_pdf\">Usefulness of Tissue Doppler Imaging-Derived Atrial Conduction Time for Prediction of Atrial Fibrillation<\/a>. Circ J. 2016;80(1):58-9.<\/li>\n<li>Takahashi S, Fujiwara M, Watadani K, Taguchi T, Katayama K, Takasaki T, Kurosaki T, Imai K, Sueda T. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/25030299\/\">Preoperative tissue Doppler imaging-derived atrial conduction time can predict postoperative atrial fibrillation in patients undergoing aortic valve replacement for aortic valve stenosis<\/a>. Circ J. 2014;78(9):2173-81.&nbsp;<\/li>\n<li>Takahashi S, Katayama K, Watanabe M, Kodama H, Taguchi T, Kurosaki T, Imai K, Sueda T. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/26538374\/\">Preoperative tissue Doppler imaging-derived atrial conduction time predicts postoperative atrial fibrillation in patients undergoing mitral valve surgery for mitral valve regurgitation<\/a>. Circ J 2016; 80: 101\u2013109.<\/li>\n<\/ol>\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tissue Doppler derived atrial conduction time: PA-TDI Total atrial conduction time (TACT) denotes the total period required for atrial activation. Conventionally it is measured using signal averaged electrocardiogram (SA-ECG) as the maximal P wave duration. It has been shown to be powerful predictor of atrial fibrillation. A simpler method which can be done in any [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":31058,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","footnotes":""},"categories":[8],"tags":[],"class_list":["post-31057","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-echocardiogram-library"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Tissue Doppler derived atrial conduction time: PA-TDI - All About Cardiovascular System and Disorders<\/title>\n<meta name=\"description\" content=\"Tissue Doppler derived atrial conduction time: Measured from onset of P wave to tissue Doppler derived peak of A wave at lateral left atrial wall (PA-TDI).\" \/>\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\/tissue-doppler-derived-atrial-conduction-time-pa-tdi\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tissue Doppler derived atrial conduction time: PA-TDI - 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