{"id":54925,"date":"2025-07-25T15:57:38","date_gmt":"2025-07-25T10:27:38","guid":{"rendered":"https:\/\/www.iquanta.in\/blog\/?p=54925"},"modified":"2025-07-25T15:57:48","modified_gmt":"2025-07-25T10:27:48","slug":"covid-vaccines-responsible-for-cardiovascular-issues","status":"publish","type":"post","link":"https:\/\/www.iquanta.in\/blog\/covid-vaccines-responsible-for-cardiovascular-issues\/","title":{"rendered":"Are COVID-19 Vaccines Responsible for the Recent Surge in Cardiovascular Issues?"},"content":{"rendered":"\n<p>What if the safety measures you take turn out to be costing you a lot more? This is exactly what the world is talking about right now? But, all that is being said is not true until proven with definite facts. The onset of the pandemic brought along with it an avalanche of information- some was accurate, some was conflicting, and some was outright confusing. This blog unpacks a popular myth regarding COVID-19 vaccines. Among the numerous swirling debates, one question that continues to echo loudly is, \u201cAre COVID-19 vaccines responsible for an increase in cardiovascular problems like strokes, arrhythmia, and heart attacks?\u201d<\/p>\n\n\n\n<p>The short answer? No, they\u2019re not the culprit, but not completely innocent either. Let\u2019s dig deeper!<\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/chat.whatsapp.com\/KsCMibLBeZyJzc3KthhDQ1?mode=ac_t\" target=\"_blank\" rel=\"noreferrer noopener\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"134\" src=\"https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/01\/WhatsApp-Image-2025-01-06-at-2.24.34-PM-1024x134.jpeg\" alt=\"\" class=\"wp-image-39547\" srcset=\"https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/01\/WhatsApp-Image-2025-01-06-at-2.24.34-PM-1024x134.jpeg 1024w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/01\/WhatsApp-Image-2025-01-06-at-2.24.34-PM-300x39.jpeg 300w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/01\/WhatsApp-Image-2025-01-06-at-2.24.34-PM-768x100.jpeg 768w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/01\/WhatsApp-Image-2025-01-06-at-2.24.34-PM-1536x201.jpeg 1536w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/01\/WhatsApp-Image-2025-01-06-at-2.24.34-PM-150x20.jpeg 150w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/01\/WhatsApp-Image-2025-01-06-at-2.24.34-PM-696x91.jpeg 696w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/01\/WhatsApp-Image-2025-01-06-at-2.24.34-PM-1068x140.jpeg 1068w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/01\/WhatsApp-Image-2025-01-06-at-2.24.34-PM.jpeg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<p><em><mark><strong>Join the free NEET whatsapp group for latest NEET updates and other important information<\/strong><\/mark><\/em><\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_77 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.iquanta.in\/blog\/covid-vaccines-responsible-for-cardiovascular-issues\/#A_Pandemic_of_Massive_Scale_%E2%80%93_What_Did_It_Leave_Behind\" >A Pandemic of Massive Scale &#8211; What Did It Leave Behind\u00a0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.iquanta.in\/blog\/covid-vaccines-responsible-for-cardiovascular-issues\/#Could_the_COVID-19_Vaccines_be_Harming_the_Heart\" >Could the COVID-19 Vaccines be Harming the Heart?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.iquanta.in\/blog\/covid-vaccines-responsible-for-cardiovascular-issues\/#What_the_Science_Says-_Its_Complicated_but_Not_Alarming\" >What the Science Says- It&#8217;s Complicated, but Not Alarming<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.iquanta.in\/blog\/covid-vaccines-responsible-for-cardiovascular-issues\/#A_Meta-Analysis_That_Took_It_All_Into_Account\" >A Meta-Analysis That Took It All Into Account<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.iquanta.in\/blog\/covid-vaccines-responsible-for-cardiovascular-issues\/#What_About_The_Other_Two_%E2%80%93_Myocarditis_and_Pericarditis\" >What About The Other Two &#8211; Myocarditis and Pericarditis<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.iquanta.in\/blog\/covid-vaccines-responsible-for-cardiovascular-issues\/#COVID-19_Infection_or_COVID-19_Vaccination_Lets_Talk_About_The_Real_Cardiac_Threat\" >COVID-19 Infection or COVID-19 Vaccination: Let&#8217;s Talk About The Real Cardiac Threat<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.iquanta.in\/blog\/covid-vaccines-responsible-for-cardiovascular-issues\/#So_Whats_Really_Behind_the_Surge_in_Heart_Problems\" >So What\u2019s Really Behind the Surge in Heart Problems?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.iquanta.in\/blog\/covid-vaccines-responsible-for-cardiovascular-issues\/#What_Do_Researchers_Have_to_Say\" >What Do Researchers Have to Say?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.iquanta.in\/blog\/covid-vaccines-responsible-for-cardiovascular-issues\/#How_Risky_is_Severe_COVID_for_the_Heart\" >How Risky is Severe COVID for the Heart?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-a-pandemic-of-massive-scale-what-did-it-leave-behind\"><span class=\"ez-toc-section\" id=\"A_Pandemic_of_Massive_Scale_%E2%80%93_What_Did_It_Leave_Behind\"><\/span><strong>A Pandemic of Massive Scale &#8211; What Did It Leave Behind\u00a0<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Let\u2019s first set the stage. The World Health Organization reported over 771 million confirmed cases of COVID-19 worldwide. The cost of the pandemic was the lives of 6.9 million people. In response, over 11.8 billion vaccine doses have been administered globally. The world calls it a historic medical achievement. But with this vast scale came valid public health concerns. The chief among them is whether the COVID-19 vaccine is taking a toll on our hearts!&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-could-the-covid-19-vaccines-be-harming-the-heart\"><span class=\"ez-toc-section\" id=\"Could_the_COVID-19_Vaccines_be_Harming_the_Heart\"><\/span><strong>Could the COVID-19 Vaccines be Harming the Heart?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Several studies have taken a magnifying glass to the cardiovascular effects of COVID-19 vaccines, but their findings have not all been in agreement. Let&#8217;s look into multiple aspects in detail:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-what-the-science-says-it-s-complicated-but-not-alarming\"><span class=\"ez-toc-section\" id=\"What_the_Science_Says-_Its_Complicated_but_Not_Alarming\"><\/span><strong>What the Science Says- It&#8217;s Complicated, but Not Alarming<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Research showed that, after vaccination,&nbsp; there was a noticeable increase in cardio related incidents like myocardial infarction, commonly known as heart attack, along with stroke and arrhythmia, a condition that disbalances the heart beat rate. However, on the brighter side, similar studies found no such link. Few studies have claimed a protective effect, especially after the third vaccine dose.<\/p>\n\n\n\n<p><em>So, who\u2019s right?<\/em><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-a-meta-analysis-that-took-it-all-into-account\"><span class=\"ez-toc-section\" id=\"A_Meta-Analysis_That_Took_It_All_Into_Account\"><\/span><strong>A Meta-Analysis That Took It All Into Account<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Given the ongoing noise and tension surrounding the implications of COVID-19 vaccines, researchers conducted a Bayesian multivariate meta-analysis. It looked across 15 studies using advanced statistical modelling. One of the methods used is Markov Chain Monte Carlo method.<\/p>\n\n\n\n<p>It resulted in four key outcomes:<\/p>\n\n\n\n<p>Coronary Artery Disease (CAD), Stroke, Myocardial Infarction and Arrhythmia.<\/p>\n\n\n\n<p>Here are the findings:<\/p>\n\n\n\n<ul>\n<li>There was a slight increase in Coronary Artery Disease (CAD) after vaccination.<\/li>\n\n\n\n<li>The overall CAD risk was <strong>OR 1.70 (95% CrI: 1.11-2.57)<\/strong><\/li>\n\n\n\n<li>After the second dose of Pfizer (BNT162b2), the CAD risk was recorded to be higher at <strong>OR 3.44<\/strong>.<\/li>\n\n\n\n<li>For other cardiovascular diseases like Stroke, Heart Attack and Arrhythmia, there was no increased risk. Instead, it led to improved results.<\/li>\n\n\n\n<li>After the third vaccine dose, the risk of Stroke significantly dropped to <strong>OR 0.19<\/strong>.<\/li>\n\n\n\n<li>There was a sudden fall of Heart Attack risk to <strong>OR 0.003<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p><strong>Analysis:<\/strong><\/p>\n\n\n\n<ul>\n<li>Coronary Artery Disease (CAD): Slightly increased risk&nbsp;<\/li>\n\n\n\n<li>Stroke:&nbsp; Risk dropped significantly (after 3rd dose)<\/li>\n\n\n\n<li>Myocardial Infarction (Heart Attack): Risk Dropped Instantly&nbsp;<\/li>\n\n\n\n<li>Arrhythmia: No increased risk.<\/li>\n<\/ul>\n\n\n\n<p>The<strong> <\/strong>overall<strong> <\/strong>takeaway is reassuring with a slightly increased risk for Coronary Artery Disease (CAD), but decrease in risk for Stroke and Heart Attack. No increased risk was recorded for Arrhythmia.<\/p>\n\n\n\n<p>Thus, we can conclude that COVID-19 vaccines are <strong>not<\/strong> driving a cardiovascular crisis.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-what-about-the-other-two-myocarditis-and-pericarditis\"><span class=\"ez-toc-section\" id=\"What_About_The_Other_Two_%E2%80%93_Myocarditis_and_Pericarditis\"><\/span>What About The Other Two &#8211; Myocarditis and Pericarditis<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Pericarditis is the inflammation of heart lining and Myocarditis is the inflammation of heart muscle. The reason behind these mentions are a bit concerning. After the second dose of mRNA vaccine, the diagnosis of Myocarditis and Pericarditis increased among younger males.<\/p>\n\n\n\n<p><strong>How serious is it? <\/strong>The cases exist, but on the rare end!<\/p>\n\n\n\n<ul>\n<li>In every 100,000 recipients, 2-12 such cases were found.<\/li>\n\n\n\n<li>Approximately 10 in every 100,000 vaccine receipent was diagnosed with one of these.<\/li>\n\n\n\n<li>The diagnosis was highest in males aged 16-29.<\/li>\n\n\n\n<li>The severity of the diagnosis was mild and treatable. It is often resolved with complications.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-covid-19-infection-or-covid-19-vaccination-let-s-talk-about-the-real-cardiac-threat\"><span class=\"ez-toc-section\" id=\"COVID-19_Infection_or_COVID-19_Vaccination_Lets_Talk_About_The_Real_Cardiac_Threat\"><\/span><strong>COVID-19 Infection or COVID-19 Vaccination: Let&#8217;s Talk About The Real Cardiac Threat<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Let&#8217;s state the fact first! COVID-19 virus is far more dangerous for your heart than COVID-19 vaccination. Here&#8217;s why-<\/p>\n\n\n\n<p>In a massive review across 40 health systems for individuals aged 5+, the cardiovascular complications was higher post-COVID when compared to post-vaccine period. Furthermore, in a study conducted in Israel, the risk of inflammation in heart muscle as a result of COVID-19 infection was 5+ times higher than from COVID-19 vaccines.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-so-what-s-really-behind-the-surge-in-heart-problems\"><span class=\"ez-toc-section\" id=\"So_Whats_Really_Behind_the_Surge_in_Heart_Problems\"><\/span><strong>So What\u2019s Really Behind the Surge in Heart Problems?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Despite online speculation, there\u2019s no evidence of a broad increase in heart disease tied to vaccines. If anything, experts say increases in cardiovascular events during the pandemic are more likely due to:<\/p>\n\n\n\n<ul>\n<li>COVID-19 infections themselves<\/li>\n\n\n\n<li>Delayed routine checkups and treatments<\/li>\n\n\n\n<li>Increased stress, poor diet, and inactivity during lockdowns<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-what-do-researchers-have-to-say\"><span class=\"ez-toc-section\" id=\"What_Do_Researchers_Have_to_Say\"><\/span><strong>What Do Researchers Have to Say?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Researchers confirm that severe COVID infection, and not COVID\u201119 vaccination, is behind the rise in cardiovascular risks.<\/p>\n\n\n\n<p><strong>Statement: COVID\u201119 dramatically increases heart risks.<\/strong><\/p>\n\n\n\n<p><br><strong>Proof: <\/strong>In a study, comprising 10,000 non-vaccinated adults in 2020 and 2,00,000 uninfected adults, it was found that COVID-19 raised the risk of cardiovascular ailments like stroke, heart attack and even death by more than two times, lasting up to 3 years post-infection. It is also said that those hospitalized with COVID-19 had four times higher risk compared to the uninfected.<\/p>\n\n\n\n<p><strong>Statement:<\/strong> <strong>ABO blood type matters<\/strong>:<br><\/p>\n\n\n\n<p><strong>Proof:<\/strong>Individuals with <strong>A, B, or AB<\/strong> blood types had a <strong>65% higher chance<\/strong> of heart attack or stroke compared to those with type O<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-how-risky-is-severe-covid-for-the-heart\"><span class=\"ez-toc-section\" id=\"How_Risky_is_Severe_COVID_for_the_Heart\"><\/span><strong>How Risky is Severe COVID for the Heart?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Turns out, it\u2019s just as dangerous as having major health conditions like diabetes or artery disease. In fact, being hospitalized with COVID is now seen as a heart disease risk equivalent just like having diabetes increases your chances of a heart attack, so does severe COVID.<\/p>\n\n\n\n<p><strong>But why does this happen?<\/strong><\/p>\n\n\n\n<p>When COVID hits hard, it triggers intense inflammation in the body. This can:<\/p>\n\n\n\n<ul>\n<li>Speed up plaque buildup in your arteries<\/li>\n\n\n\n<li>Increase the chances of blood clots<\/li>\n\n\n\n<li>Lead to heart attacks, strokes, or lung clots (pulmonary embolism)<\/li>\n<\/ul>\n\n\n\n<p><strong>The worst part?<\/strong><\/p>\n\n\n\n<p>This heart risk doesn\u2019t disappear after recovery. People who were hospitalized or in the ICU still carry this higher risk for years.<\/p>\n\n\n\n<p>As an end-note, severe COVID sets off a chain reaction, inflammation, clotting, artery damage, which can leave long-term scars on your heart. The recent rise in heart issues? It\u2019s not the vaccines causing it. It\u2019s the virus itself.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.iquanta.in\/details\/neet-full-course-2026\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Join iQuanta NEET 2026 Batch<\/strong><\/a><\/p>\n\n\n\n<figure class=\"wp-block-image\"><a href=\"https:\/\/www.iquanta.in\/details\/neet-full-course-2026\"><img decoding=\"async\" width=\"1024\" height=\"396\" src=\"https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/NEETNtapasya-1024x396.jpg\" alt=\"\" class=\"wp-image-52015\" srcset=\"https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/NEETNtapasya-1024x396.jpg 1024w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/NEETNtapasya-300x116.jpg 300w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/NEETNtapasya-768x297.jpg 768w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/NEETNtapasya-150x58.jpg 150w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/NEETNtapasya-696x269.jpg 696w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/NEETNtapasya-1068x413.jpg 1068w, https:\/\/www.iquanta.in\/blog\/wp-content\/uploads\/2025\/06\/NEETNtapasya.jpg 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>What if the safety measures you take turn out to be costing you a lot more? This is exactly what the world is talking about right now? But, all that is being said is not true until proven with definite facts. The onset of the pandemic brought along with it an avalanche of information- some [&hellip;]<\/p>\n","protected":false},"author":533,"featured_media":54939,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1098],"tags":[1125,1121],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.4 (Yoast SEO v21.9.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Are COVID-19 Vaccines Responsible for the Recent Surge in Cardiovascular Issues? - iQuanta<\/title>\n<meta name=\"description\" content=\"The onset of the pandemic brought along with it an avalanche of information- some was accurate, some was conflicting, and some was outright confusing. 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