{"id":6729,"date":"2012-11-21T20:47:12","date_gmt":"2012-11-22T01:47:12","guid":{"rendered":"http:\/\/insidesurgery.com\/?p=6729"},"modified":"2012-11-21T20:58:51","modified_gmt":"2012-11-22T01:58:51","slug":"long-qt-syndrome","status":"publish","type":"post","link":"https:\/\/insidesurgery.com\/2012\/11\/long-qt-syndrome\/","title":{"rendered":"Long QT Syndrome"},"content":{"rendered":"
Long QT syndrome (LQTS) is an episode arrhythmia usually first presenting in childhood. The average age of first syncopal episode is 14 years with a one year mortality of 20% after first presentation.<\/p>\n
<\/p>\n
A high degree of suspicion is required if the QTc or corrected QT interval is > .44 seconds. When evaluating for long QTc it is important that the calculation from the beginning of the QRS wave to the end of the T wave be performed manually and not taken from the autocalculation supplied by the ECG machine.<\/p>\n
The LQTS syncopal episode can be precipitated by emotional and psychological stress (e.g. fright, anger, pain), during physical exercise, and after sudden startling. The classic scenario is a child who dives into a cold lake or pond with onset of arrhythmia, syncope, and risk of drowning.<\/p>\n
Although most cases of LQTS occur as an isolated condition, Jervell and Lange-Nielsen syndrome is a rare autosomal recessive congenital syndrome marked by sensory deafness and LQTS. Any child with deafness and syncopal episodes must be worked up for presence of this condition.<\/p>\n","protected":false},"excerpt":{"rendered":"
Long QT syndrome (LQTS) is an episode arrhythmia usually first presenting in childhood. The average age of first syncopal episode is 14 years with a one year mortality of 20% after first presentation.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[5080,5108],"tags":[5112,5110,5106,5109,5113,5111,2986],"yoast_head":"\n