[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-1-en-105":3,"doc-seo-571436-105":53,"doc-detail-571436-en":127},{"code":4,"msg":5,"data":6},0,"success",[7,14,19,24,29,34,39,44,49],{"id":8,"doc_module":9,"doc_module_name":10,"category_name":11,"show_sort_weight":12,"slug":13},11,1,"Template","Presentations",90,"presentations",{"id":15,"doc_module":9,"doc_module_name":10,"category_name":16,"show_sort_weight":17,"slug":18},12,"Resumes",80,"resumes",{"id":20,"doc_module":9,"doc_module_name":10,"category_name":21,"show_sort_weight":22,"slug":23},14,"Invoices",70,"invoices",{"id":25,"doc_module":9,"doc_module_name":10,"category_name":26,"show_sort_weight":27,"slug":28},15,"Posters",60,"posters",{"id":30,"doc_module":9,"doc_module_name":10,"category_name":31,"show_sort_weight":32,"slug":33},16,"Social Media",50,"social-media",{"id":35,"doc_module":9,"doc_module_name":10,"category_name":36,"show_sort_weight":37,"slug":38},17,"Forms",40,"forms",{"id":40,"doc_module":9,"doc_module_name":10,"category_name":41,"show_sort_weight":42,"slug":43},18,"Letters",30,"letters",{"id":45,"doc_module":9,"doc_module_name":10,"category_name":46,"show_sort_weight":47,"slug":48},21,"Paper Templates",5,"papers-templates",{"id":50,"doc_module":9,"doc_module_name":10,"category_name":51,"show_sort_weight":4,"slug":52},158,"General","general-158",{"code":4,"msg":54,"data":55},"ok",{"site_id":56,"language":57,"slug":58,"title":59,"keywords":60,"description":61,"schema_data":62,"social_meta":120,"head_meta":122,"extra_data":124,"updated_unix":126},105,"en","ecg-interpretation-tachy-or-brady-rhythm-axis-intervals-st-segment-tu-waves","ECG Interpretation - Tachy or Brady, Rhythm, Axis, Intervals, ST Segment, T/U Waves","","ECG Interpretation cheat sheet covering key ECG components and how to categorize abnormalities. It guides readers through rhythm classification (regular, irregularly irregular), rate assessment (tachycardia vs bradycardia), cardiac axis deviation using S greater than R rules, and interval/wave analysis including P-QRS relationships for AF, flutter, tachycardia with block, junctional tachycardia, and conduction blocks. It also summarizes Q and QRS wave significance, ST segment depression/elevation patterns for demand vs supply ischemia, and T and U wave interpretations for infarct timing, hyperkalemia, hypokalemia, and related patterns such as Wolff-Parkinson-White.",{"@graph":63,"@context":119},[64,80,102],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":51,"@type":70,"position":76},"https://docshare.wps.com/template/general/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/ecg-interpretation-tachy-or-brady-rhythm-axis-intervals-st-segment-tu-waves/571436/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/ecg-interpretation-tachy-or-brady-rhythm-axis-intervals-st-segment-tu-waves/571436.png","ImageObject",442,249,{"name":88,"@type":89},"Chumphorn","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-25","2026-10-13",true,{"@type":98,"interactionType":99,"userInteractionCount":101},"InteractionCounter",{"@type":100},"ViewAction",6,{"@type":103,"mainEntity":104},"FAQPage",[105,111,115],{"name":106,"@type":107,"acceptedAnswer":108},"How do you interpret ECG rhythm and rate from this sheet?","Question",{"text":109,"@type":110},"Rhythm is classified as regular, regularly irregular, or irregularly irregular. Rate is assessed as tachy or brady.","Answer",{"name":112,"@type":107,"acceptedAnswer":113},"How do you determine cardiac axis deviation using lead comparisons?",{"text":114,"@type":110},"If S is greater than R in lead I, it indicates RIGHT axis. If S is greater than R in lead II, it indicates LEFT axis.",{"name":116,"@type":107,"acceptedAnswer":117},"What does ST segment depression vs elevation indicate?",{"text":118,"@type":110},"ST depressed corresponds to demand ischemia, while ST elevated corresponds to supply ischemia.","https://schema.org",{"og:url":78,"og:type":121,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":123,"canonical":78},"index,follow",{"doc_id":125,"site_id":56},571436,1792122288,{"code":4,"msg":5,"data":128},{"doc_id":125,"user_id":129,"nickname":88,"user_avatar":130,"doc_module":9,"category_id":50,"category_name":51,"doc_title":59,"doc_description":61,"doc_content":131,"file_id":132,"file_url":133,"file_type":134,"file_size":135,"view_count":101,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":9,"language":136,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":137,"faqs":138,"seo_title":139,"seo_description":61,"update_tm":140,"read_time":4},2336475401981,"https://ap-avatar.wpscdn.com/avatar/22000c94efd8d5204d?x-image-process=image/resize,m_fixed,w_180,h_180&k=1786935347598174694","put together by Alex Yartsev: Sorry if i used your images  \nor data and forgot to reference you. Tell me who you are.  \n[aleksei.igorevich@gmail.com](aleksei.igorevich@gmail.com)  \nECG Interpretation  1) RHYTHM:  \nregular, regularly irregular, irregularly irregular  \n2) RATE:  \ntachy or brady  \n4) CARDIAC AXIS DEVIATION:  \nS greater than R in lead I = RIGHT AXIS  \nS greater than R in lead II = LEFT AXIS  \nMax QRS = 3 small squares  \nPR = 1 big square  \n3) P wave =atria depolarising  \nshould be 1 P for every QRS:  \nHow many Ps per QRS?  \nHow long is the PQ interval?  \nirregular P with irregular rhythm QRS = AF absent P with wide QRS = Ventricular Tachy absent P with narrow QRS = Junctional Tachy continuos undulating sawtooth baseline P = Atrial Flutter continuos with 2P per 1 QRS = Atrial Tachy with block  \nbifid Long P waves = LA enlargement  \npeaked tall P waves = RA enlargement  \nnormal rate, 2Ps per QRS = second degree block Progressive PQ lengthening = second degree block Long PQ interval = first degree block  \nPs don’t match to QRS, very brady = complete block No P wave but a solitary QRS = ventricular extrasystole  \n4) Q wave =septum depolarising or hole in conduction pattern  \nHOW BIG? Normal unless large,  \nBig Q wave = Infarct in the direction of THAT LEAD  \n5) QRS =ventricles depolarising;  \nHOW BIG? Normal under 25mm,  \nHOW WIDE? Hyperkalemia, BBB  \nDEFORMED QRS?  \nHuge tall QRS = LV hypertrophy  \nWeak little QRS = old infarcted muscle  \nRSR pattern (“M”) in V1 = Right Bundle Branch Block SRS pattern (“W”) in V1= Left Bundle Branch Block  \nA “Delta”wave (gently up-sloping R) =  \n= Wolff-Parkinson-White Syndrome  \n6) ST SEGMENT:  \nDEPRESSED OR ELEVATED? Biggest ST points to the lesion  \nDepressed = demand ischaemia, elevated = supply ischaemia  \nV1 V6  \nP is the HEART BLOCK WAVE  \nP is also the ENLARGED ATRIUM WAVE Q is the INFARCT WAVE  \nQRS is the CARDIAC AXIS COMPASS ST is the ISCHAEMIA SEGMENT  \nT is the HYPERKALEMIA WAVE U wave is the HYPOKALEMIA WAVE Long P = LAH; RSR = RBBB;  \nST Depression = Demand ischaemia  \nRBBB  \nLBBB  \nLead II looks from the NORMAL DIRECTION II, III, aVF 􀀁 inf. view V1, V2 = Rt Heart V3, V4 = Septum V5, V6 = Lt Heart  \nEvolution of an infarct:  \nST􀀁 Q wave 12hrs later 􀀁 T inversion  \nQRS in lead I is smaller and in lead II is bigger on inspiration  \nDown-sloping ST = Digoxin therapy  \nCONCAVE ST elevation in all leads, with elevated PR in aVR 􀀁 pericarditis 7) T wave =ventricles repolarising  \nTALL? INVERTED?? WITH “U” WAVE???  \ninverted = infarct in last 24-48 hrs; without Q waves = Subendocardial infarct continuously painlessly inverted = LV hypertrophy  \nwith U wave = HYPOKALEMIA  \nTall T waves, Wide QRS, no ST segment = HYPERKALEMIA  \n9) U wave  \njust a little bump on the end of the T wave = HYPOKALEMIA 􀀁  \nWolff-Parkinson-White syndrome","cbCaic8ouEnUBWwN","https://ap.wps.com/l/cbCaic8ouEnUBWwN","pdf",137144,"English","# ECG Interpretation\n## Rhythm and Rate\n## Cardiac Axis and Intervals\n## P Wave and Conduction Blocks\n## Q Wave and QRS Complex\n## ST Segment\n## T Wave and U Wave","[{\"question\":\"How do you interpret ECG rhythm and rate from this sheet?\",\"answer\":\"Rhythm is classified as regular, regularly irregular, or irregularly irregular. Rate is assessed as tachy or brady.\"},{\"question\":\"How do you determine cardiac axis deviation using lead comparisons?\",\"answer\":\"If S is greater than R in lead I, it indicates RIGHT axis. If S is greater than R in lead II, it indicates LEFT axis.\"},{\"question\":\"What does ST segment depression vs elevation indicate?\",\"answer\":\"ST depressed corresponds to demand ischemia, while ST elevated corresponds to supply ischemia.\"}]","ECG Interpretation - Tachy or Brady, Rhythm, Axis, Intervals, ST Segment, T/U Waves | PDF",1791917500]