[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-461689-105":59,"doc-detail-461689-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","chocolate-induced-sinus-tachycardia-a-sweet-surprise","Chocolate-Induced Sinus Tachycardia - A Sweet Surprise","","Sinus tachycardia represents a frequent clinical finding driven by diverse physiological or pathological triggers, making identification of the precipitating cause essential for safe and appropriate treatment. A 63-year-old man presented with palpitations and dizziness without chest pain, syncope, or dyspnea. ECG confirmed sinus tachycardia; inflammatory markers, thyroid studies, and cardiac enzymes were normal. Detailed history revealed excessive nightly dark chocolate intake (about 180–200 g/day) for two weeks. Symptoms resolved after bisoprolol, intravenous fluids, and dietary counselling.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/chocolate-induced-sinus-tachycardia-a-sweet-surprise/461689/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/chocolate-induced-sinus-tachycardia-a-sweet-surprise/461689.png","ImageObject",300,407,{"name":92,"@type":93},"ahduag","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-07","2026-09-30",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What caused the sinus tachycardia in this case?","Question",{"text":112,"@type":113},"The case attributes sinus tachycardia to excessive chocolate intake, which contains methylxanthines such as caffeine and theobromine that can increase heart rate and blood pressure.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What diagnostic findings were reported on arrival?",{"text":117,"@type":113},"Electrocardiography showed sinus tachycardia without additional abnormalities. Laboratory tests, including inflammatory markers, thyroid function, and cardiac enzymes (including D-dimer and troponin), were within normal limits.",{"name":119,"@type":110,"acceptedAnswer":120},"How was the patient treated and what was the result?",{"text":121,"@type":113},"The patient received intravenous fluids and a single dose of bisoprolol, along with dietary counselling. This led to resolution of palpitations and dizziness.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},461689,1790762165,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":19,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":52,"preview_page_count":4},3985747870414,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","Review began 11/22/2025  \nReview ended 12/05/2025  \nPublished 12/10/2025  \n© Copyright 2025  \nRabi et al. This is an open access article distributed under the terms of the Creative Commons Attribution License CC-BY 4.0. , which permits unrestricted use , distribution , and reproduction in any medium , provided the original author and source are credited.  \nDOI: 10.7759/cureus.98908  \nOpen Access Case Report  \nChocolate-Induced Sinus Tachycardia: A Sweet Surprise  \nMeena Rabi 1 , Luna Khan 2 , Adil Rabi 3  \n1. Cardiology, Royal Bolton Hospital, Bolton, GBR 2. Emergency Department, Lancaster University, Blackpool, GBR 3. Emergency Medicine, Blackpool Victoria Hospital, Blackpool, GBR  \nCorresponding author: Meena Rabi, [meena.rabi@icloud.com](meena.rabi@icloud.com)  \nAbstract  \nSinus tachycardia is a common clinical presentation caused by various physiological or pathological factors and triggers. Determining the underlying cause of this presentation is crucial for providing effective and appropriate management.  \nWe report the case of a 63-year-old male who presented to the emergency department with palpitations and dizziness. He had no associated symptoms such as chest pain, syncope, or breathlessness. Electrocardiography showed sinus tachycardia without any additional abnormalities. Laboratory investigations, including inflammatory markers, thyroid function tests, and cardiac enzymes such as d-dimerand troponin, were within normal limits. Additionally, a detailed history revealed excessive chocolate consumption of approximately 180 grams nightly for two weeks. He was treated with bisoprolol, intravenous fluids, and dietary counselling, which led to the resolution of his symptoms.  \nChocolate contains methylxanthines, such as caffeine and related stimulants, which can increase heart rate and blood pressure, and may induce arrhythmias by stimulating the sympathetic nervous system. These effects can occur even in individuals without pre-existing cardiovascular disease. Consequently, dietary factors should not be overlooked during the evaluation of unexplained tachycardia, as they may play a significant role in its aetiology.  \nThis case highlights the importance of considering dietary factors, like chocolate and caffeine intake, when assessing patients with tachycardia. Identifying reversible, lifestyle-related causes can prevent unnecessary investigations and ensure the initiation of effective management.  \nCategories: Cardiology, Emergency Medicine, Medical Education  \nKeywords: caffeine, cardiac arrythmia, chocolate, dietary factors, methylxanthines, palpitations, sinus tachycardia, theobromine  \nIntroduction  \nSinus tachycardia is a common presentation and electrocardiographic finding. It is defined as a regular heart rhythm and rate faster than 100 beats per minute with normal P-wave morphology and axis [1] . This can occur in response to various factors, including anxiety, exercise, infection, endocrine abnormalities, or the use of certain medications. The heart rate increases when the sinoatrial node accelerates electrical signals to the atrioventricular node. This then transmits these impulses through the bundle of His to the ventricles of the heart [2] . The list of differential diagnoses is extensive, and prompt identification of the underlying cause is essential for timely investigation and management.  \nCaffeine and theobromine, found in chocolate, energy drinks, and other caffeinated drinks such as coffee and tea, are stimulants known to increase heart rate and cardiac output [3,4] . This case describes isolated sinus tachycardia associated with excessive chocolate consumption in an otherwise healthy adult, highlighting the importance of a thorough dietary history when investigating unexplained tachycardia.  \nCase Presentation  \nWe present the case of a 63-year-old man with no prior cardiac history who presented to the Emergency Department at 10:00 a.m. with palpitations that began at 01:00 a.m. He reported dizzines","cbCailCqYuyTaYVK","https://ap.wps.com/l/cbCailCqYuyTaYVK","pdf",1020152,"English","# Abstract\n# Introduction\n# Case Presentation\n# Laboratory Investigations\n# ECG Findings\n# Treatment and Outcome","[{\"question\":\"What caused the sinus tachycardia in this case?\",\"answer\":\"The case attributes sinus tachycardia to excessive chocolate intake, which contains methylxanthines such as caffeine and theobromine that can increase heart rate and blood pressure.\"},{\"question\":\"What diagnostic findings were reported on arrival?\",\"answer\":\"Electrocardiography showed sinus tachycardia without additional abnormalities. Laboratory tests, including inflammatory markers, thyroid function, and cardiac enzymes (including D-dimer and troponin), were within normal limits.\"},{\"question\":\"How was the patient treated and what was the result?\",\"answer\":\"The patient received intravenous fluids and a single dose of bisoprolol, along with dietary counselling. This led to resolution of palpitations and dizziness.\"}]","Chocolate-Induced Sinus Tachycardia - A Sweet Surprise | PDF"]