{"id":2426,"date":"2025-11-20T22:23:03","date_gmt":"2025-11-21T04:23:03","guid":{"rendered":"https:\/\/drakarlacastolo.com\/?p=2426"},"modified":"2025-11-20T22:58:05","modified_gmt":"2025-11-21T04:58:05","slug":"stress-test","status":"publish","type":"post","link":"https:\/\/drakarlacastolo.com\/en\/blog\/diagnostic-evaluation\/stress-test\/","title":{"rendered":"Stress test: preparation, risks and results"},"content":{"rendered":"<p>The <strong>stress test<\/strong> (or ergometry) is a test in which the electrical activity of the heart is recorded while you walk or run on a treadmill, or pedal a stationary bicycle. It is used to assess how your heart responds to exercise and whether signs of <strong>ischemia (lack of irrigation)<\/strong>, arrhythmias or other changes that are not seen at rest.<\/p>\n\n\n\n<p>In this guide you will see <strong>when indicated<\/strong>, how you should <strong>get ready<\/strong>, What are the real risks and what kind of information does it provide for your diagnosis and treatment?.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Brief warning: This text is informative and does not replace your medical evaluation. The indication and protocol of your stress test must be discussed individually with your cardiologist.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">What is a stress test and what is it for?<\/h2>\n\n\n\n<p>During the stress test:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>You are connected to a <strong>continuous electrocardiogram<\/strong>.<\/li>\n\n\n\n<li>You walk or run on a treadmill that gradually increases in speed and incline (or pedal a bicycle).<\/li>\n\n\n\n<li>They measure your <strong>heart rate, blood pressure and symptoms<\/strong> at each stage.<\/li>\n<\/ul>\n\n\n\n<p>The test helps answer questions such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Does chest pain or shortness of breath occur with exercise?<\/li>\n\n\n\n<li>Does the ECG show signs of <strong>ischemia<\/strong> by demanding the heart?<\/li>\n\n\n\n<li>Are they triggered <strong>arrhythmias<\/strong> with the effort?<\/li>\n\n\n\n<li>What is your <strong>functional capacity<\/strong> approximate (how many METs do you reach)?<\/li>\n<\/ul>\n\n\n\n<p>When well indicated and supervised, it is a very useful tool for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Study <strong>chest pain suspicious of cardiac origin<\/strong>.<\/li>\n\n\n\n<li>Rate <strong>coronary risk<\/strong> in certain patients.<\/li>\n\n\n\n<li>Evaluate whether it is safe to start or intensify an exercise program.<\/li>\n\n\n\n<li>Assist in the design of a plan in the context of <a href=\"https:\/\/drakarlacastolo.com\/en\/cardiac-rehabilitation\/\" data-type=\"link\" data-id=\"https:\/\/drakarlacastolo.com\/rehabilitacion-cardiaca\/\">Cardiac rehabilitation<\/a>.<\/li>\n<\/ul>\n\n\n\n<p>More technical details can be found on the studio's website: <a href=\"https:\/\/drakarlacastolo.com\/en\/studies\/stress-test\/\" data-type=\"link\" data-id=\"https:\/\/drakarlacastolo.com\/estudios\/prueba-de-esfuerzo\/\">Cardiac stress test (Ergometry)<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">In which cases is a stress test usually indicated?<\/h2>\n\n\n\n<p>The idea is not to \u201cmake it routine\u201d to everyone, but when it answers a specific question. Some typical scenarios:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Chest pain or discomfort on exertion<\/strong>\n<ul class=\"wp-block-list\">\n<li>Oppressive discomfort, burning or pressure in the chest when climbing stairs or walking fast.<\/li>\n\n\n\n<li>The aim is to see if the effort causes changes in the ECG that suggest obstructions in the coronary arteries.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Dyspnea (shortness of breath) with moderate activity<\/strong>\n<ul class=\"wp-block-list\">\n<li>When it is not clear whether the cause is cardiological, pulmonary, physical deconditioning or other.<\/li>\n\n\n\n<li>The heart's response to exercise provides important clues.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Evaluation before starting intense exercise or sport<\/strong>\n<ul class=\"wp-block-list\">\n<li>Especially in patients over a certain age or with risk factors.<\/li>\n\n\n\n<li>It can be integrated into a <a href=\"https:\/\/drakarlacastolo.com\/en\/studies\/evaluacion-cardiovascular-predeportiva\/\" data-type=\"link\" data-id=\"https:\/\/drakarlacastolo.com\/estudios\/evaluacion-cardiovascular-predeportiva\/\">Pre-sports Cardiovascular Evaluation<\/a>.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Follow-up in known coronary artery disease<\/strong>\n<ul class=\"wp-block-list\">\n<li>To assess response to treatment, functional capacity and risk.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Adjustment of the <a>Cardiac rehabilitation<\/a><\/strong>\n<ul class=\"wp-block-list\">\n<li>Helps to define safe intensity zones for exercise.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>In many people, the stress test is part of an overall <a href=\"https:\/\/drakarlacastolo.com\/en\/cardiac-checkup\/\" data-type=\"link\" data-id=\"https:\/\/drakarlacastolo.com\/checkup-cardiologico\/\">cardiological check-up<\/a> not from a \u201cgeneric package\u201d.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to prepare for a stress test<\/h2>\n\n\n\n<p>Your cardiologist will give you specific indications, but in general:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Clothing and footwear<\/strong>\n<ul class=\"wp-block-list\">\n<li>Wear comfortable and light clothing.<\/li>\n\n\n\n<li>Wear tennis shoes or stable sports shoes.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Pre-feeding<\/strong>\n<ul class=\"wp-block-list\">\n<li>Avoid very abundant meals in the 2-3 hours before.<\/li>\n\n\n\n<li>Do not arrive with prolonged fasting (so as not to get dizzy).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Medications<\/strong>\n<ul class=\"wp-block-list\">\n<li>Some drugs, such as certain beta-blockers, can modify the heart's response to exercise.<\/li>\n\n\n\n<li>NEVER discontinue medications on your own: your cardiologist will tell you whether you should take the usual dose or make any adjustments.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Caffeine, tobacco and alcohol<\/strong>\n<ul class=\"wp-block-list\">\n<li>It is usually recommended to avoid caffeine and tobacco a few hours beforehand.<\/li>\n\n\n\n<li>Do not show up with a hangover or under the influence of alcohol.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Rest<\/strong>\n<ul class=\"wp-block-list\">\n<li>Get a reasonably good night's sleep the night before, as far as possible.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>If you have specific doubts (e.g., you are under treatment with multiple drugs or have a pacemaker), it is ideal to clarify them in the previous consultation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How the study is performed, step by step<\/h2>\n\n\n\n<p>A typical stress test scheme:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Initial assessment at rest<\/strong>\n<ul class=\"wp-block-list\">\n<li>Brief review of symptoms, history and current medications.<\/li>\n\n\n\n<li>A <a href=\"https:\/\/drakarlacastolo.com\/en\/studies\/electrocardiogram-echocardiogram\/\" data-type=\"link\" data-id=\"https:\/\/drakarlacastolo.com\/estudios\/electrocardiograma-ecg\/\">Electrocardiogram (ECG)<\/a> basal and blood pressure is taken.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Placement of electrodes and band<\/strong>\n<ul class=\"wp-block-list\">\n<li>Stickers are placed on the chest connected to the monitor.<\/li>\n\n\n\n<li>You are placed on the band or bike and the protocol is explained.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Stages of progressive exercise<\/strong>\n<ul class=\"wp-block-list\">\n<li>Speed and inclination increase in stages (e.g., every 3 minutes).<\/li>\n\n\n\n<li>ECG, heart rate, pressure and symptoms are recorded at each stage.<\/li>\n\n\n\n<li>The test is stopped if:\n<ul class=\"wp-block-list\">\n<li>You reach your target heart rate.<\/li>\n\n\n\n<li>You present important symptoms.<\/li>\n\n\n\n<li>The ECG shows changes that warrant stopping exertion.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Recovery phase<\/strong>\n<ul class=\"wp-block-list\">\n<li>Monitoring continues as the rhythm and pressure return to baseline.<\/li>\n\n\n\n<li>This part also provides valuable information (e.g., slow heart rate recovery).<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>The total duration in the laboratory is usually 30 to 60 minutes, although the exercise time is shorter.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Real risks of the stress test<\/h2>\n\n\n\n<p>It is normal to feel some trepidation at the thought of \u201cstraining\u201d your heart in a study, especially if you already have symptoms. Key points about risks:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In the vast majority of patients, the test runs without complications.<\/li>\n\n\n\n<li>There is a <strong>very low risk<\/strong> of events such as significant arrhythmias, severe angina or, in very rare cases, infarction.<\/li>\n\n\n\n<li>Precisely because of this:\n<ul class=\"wp-block-list\">\n<li>The study is conducted in a controlled environment.<\/li>\n\n\n\n<li>Trained personnel and emergency equipment are available.<\/li>\n\n\n\n<li>The test is stopped as soon as alarm data appears.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Before indicating it, your cardiologist evaluates if the <strong>expected benefit<\/strong> (diagnostic information, treatment guide) <strong>far outweighs the risk<\/strong>, and whether this risk is acceptable in your particular case.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What kind of results can you expect<\/h2>\n\n\n\n<p>A stress test report may include data such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Functional capacity<\/strong> (METs achieved).<\/li>\n\n\n\n<li>Whether or not <strong>typical chest pain<\/strong> during exercise.<\/li>\n\n\n\n<li>Presence of <strong>changes in the ST<\/strong> or other ECG alterations suggestive of ischemia.<\/li>\n\n\n\n<li>Appearance of <strong>arrhythmias<\/strong> (supraventricular or ventricular) triggered by exertion.<\/li>\n\n\n\n<li>Response from the <strong>blood pressure<\/strong> (normal, exaggerated, hypotensive).<\/li>\n\n\n\n<li>Time of <strong>heart rate recovery<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>With this, your cardiologist can:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Estimate your <strong>coronary risk<\/strong> with greater precision.<\/li>\n\n\n\n<li>Decide whether you require additional studies (e.g., imaging tests) or treatment adjustment.<\/li>\n\n\n\n<li>Define <strong>safe exercise areas<\/strong> and integrate, if appropriate, into a training program. <a href=\"https:\/\/drakarlacastolo.com\/en\/cardiac-rehabilitation\/\" data-type=\"link\" data-id=\"https:\/\/drakarlacastolo.com\/rehabilitacion-cardiaca\/\">Cardiac rehabilitation<\/a>.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">When is NOT the right time for a stress test?<\/h2>\n\n\n\n<p>There are situations in which a stress test is contraindicated or should be postponed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Typical chest pain at rest or suspected acute myocardial infarction in progress.<\/li>\n\n\n\n<li>Unstable arrhythmias, decompensation of heart failure or hypertensive crisis.<\/li>\n\n\n\n<li>Some severe untreated valvular conditions.<\/li>\n<\/ul>\n\n\n\n<p>In these scenarios, the priority is the <strong>urgent care or stabilization<\/strong>, not the programmed effort.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How do you know if you need it?<\/h2>\n\n\n\n<p>You may be a candidate for a stress test if:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>You have <strong>chest discomfort<\/strong> or shortness of breath that appears with exertion.<\/li>\n\n\n\n<li>You plan to start or increase an exercise program and have risk factors (age, hypertension, diabetes, high cholesterol, smoking, family history).<\/li>\n\n\n\n<li>You have already been diagnosed with coronary artery disease and your cardiologist wants to assess functional capacity and response to treatment.<\/li>\n<\/ul>\n\n\n\n<p>If you recognize yourself in any of these points, you can comment on them during your <a href=\"https:\/\/drakarlacastolo.com\/en\/cardiac-checkup\/\">cardiological check-up<\/a> or request more information directly through the <a href=\"https:\/\/drakarlacastolo.com\/en\/contact\/\" data-type=\"link\" data-id=\"https:\/\/drakarlacastolo.com\/contacto\/\">contact<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">References<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2012 ACCF\/AHA Guideline for the Diagnosis and Management of Patients With Stable Ischemic Heart Disease (Circulation):<br><a href=\"https:\/\/www.ahajournals.org\/doi\/10.1161\/CIR.0b013e318277d6a0\" target=\"_blank\" rel=\"noopener\">https:\/\/www.ahajournals.org\/doi\/10.1161\/CIR.0b013e318277d6a0<\/a><\/li>\n\n\n\n<li>Gibbons et al. ACC\/AHA 2002 Guideline Update for Exercise Testing (Circulation):<br><a>https:\/\/www.ahajournals.org\/doi\/10.1161\/01.CIR.0000041700.29784.3C<\/a><\/li>\n\n\n\n<li>Arena et al. Assessment of functional capacity in clinical cardiology (Circulation):<br><a>https:\/\/www.ahajournals.org\/doi\/10.1161\/CIRCULATIONAHA.110.949131<\/a><\/li>\n<\/ul>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>La prueba de esfuerzo (o ergometr\u00eda) es un estudio en el que se registra la actividad el\u00e9ctrica del coraz\u00f3n mientras caminas o corres en una banda, o pedaleas una bicicleta fija. Sirve para evaluar c\u00f3mo responde tu coraz\u00f3n al ejercicio y si aparecen signos de isquemia (falta de riego), arritmias u otros cambios que no [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2431,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2426","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-evaluacion-diagnostico"],"acf":[],"_links":{"self":[{"href":"https:\/\/drakarlacastolo.com\/en\/wp-json\/wp\/v2\/posts\/2426","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/drakarlacastolo.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/drakarlacastolo.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/drakarlacastolo.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/drakarlacastolo.com\/en\/wp-json\/wp\/v2\/comments?post=2426"}],"version-history":[{"count":0,"href":"https:\/\/drakarlacastolo.com\/en\/wp-json\/wp\/v2\/posts\/2426\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/drakarlacastolo.com\/en\/wp-json\/wp\/v2\/media\/2431"}],"wp:attachment":[{"href":"https:\/\/drakarlacastolo.com\/en\/wp-json\/wp\/v2\/media?parent=2426"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/drakarlacastolo.com\/en\/wp-json\/wp\/v2\/categories?post=2426"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/drakarlacastolo.com\/en\/wp-json\/wp\/v2\/tags?post=2426"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}