These cookies ensure basic functionalities and security features of the website, anonymously. This means that there is a lower chance of the person developing coronary artery disease in the future due to the amount of stress placed on their heart during the test. Score requires the patient to undergo the Bruce protocol. Irrespective of test findings, however, subsequent cardiac risk is extremely low. The Duke treadmill score 1, 2 was calculated as: exercise time (5 maximum ST deviation) (4 angina index). Duke Treadmill scoring system predicts 5-year mortality, where low-risk scores have a 5-year survival of 97%, intermediate risk scores have a 5-year survival of 90%, and high-risk scores indicate a 5-year survival of about 65%. How long can you live with myocardial ischemia? Some factors that can contribute to a high score include age, medical history and exercise habits. exercise is the duration of exercise expressed in minutes; ST-segment dev. If you are 40 years old, the maximum heart rate will be 220 to 40. Cardiologist doubled my statin dose and scheduled a stress test. J Am Coll Cardiol; 32(6):1657-64. The higher the physical task is, the more oxygen you consume and the higher the METs: Under 3 METs: Light-intensity activity. Positive or abnormal: Doctors may conclude the stress test is positive for cardiac ischemiameaning the heart muscle wasnt getting adequate oxygenated blood during the stress. 10 What does Duke treatment score mean for heart disease? The test increases in speed and incline over the course of a couple of minutes. Angina or significant ST depression (greater than 2 mm) before completing Stage 2 of the Bruce protocol and/or ST depressions that persist for more than 5 minutes into recovery suggest severe ischemia and high risk for coronary events. Duke Treadmill Score was originally developed using data from 2842 consecutive inpatients referred to Duke University Medical Center between 1969 and 1980 with known or suspected coronary artery disease who underwent exercise testing according to the Bruce protocol 4 before diagnostic angiography who had both cardiac catheterization and treadmill exercise testing 5. Its important to keep your. We also use third-party cookies that help us analyze and understand how you use this website. The exercise stress test usually takes 10 to 15 minutes, but part one can take up to 45 minutes. Duke treadmill score (DTS) is well recognized as a simple prognostic score in patients with suspected coronary artery disease (CAD).1,2 It is positioned as a valid clinical tool when clinicians need to make a decision about the catheterization of patients with suspected CAD. Make sure you take care of your machine by keeping it clean and oiled regularly to ensure its longevity. Talk to your doctor about what kind of exercise is best for you and whether or not a Duke treadmill score is an accurate measurement of how healthy you are overall. A health care provider watches your . The one-year mortality rate refers to the percentage of patients who die within one year after receiving treatment. 10. Exercise makes the heart pump harder and faster. Patients with <1 mm of exercise-induced ST-segment depression should be counted as having 0 mm. Other factors such as your age, weight and fitness level also contribute to your risk of heart disease. Moderate-intensity activity is three to six METs. The results of an EST can be either positive or negative. The predicted 4 year survival was 99% which shows that this type of exercise has a long-term positive effect on health. A plaque can still cause problems, such as forming clot and blocking arteries. If youre looking for a budget-friendly treadmill, this might be a suitable option for you. (1998) Value of exercise treadmill testing in women. A test should last between 8 and 12 minutes if it is premature stopped due to fatigue or symptoms. In the article below to you will find more information about this coronary artery disease test and it's components. Stage 1 of the Bruce protocol is performed at 1.7 miles per hour and a 10% gradient. I. undergo a modified Bruce protocol or a manually adjusted protocol. This score may be due to a number of factors, including poor fitness level, heart disease, or other health conditions. 9 What should the score be on the treadmill test? For some people, the first sign of CAD can be a heart attack; however, many patients experience various symptoms of this illness beforehand. If any of these ECG abnormalities are noted, the test should be performed with the addition of an imaging modality. Background: Exercise electrocardiography is a long-standing method for the evaluation of coronary artery disease (CAD), and it remains the initial test for most patients who can exercise adequately with a baseline interpretable electrocardiogram. Mildly positive : horizontal ST depression of 1 to 1.5 mm and slowly rising junctional depression, which remains depressed 1.5 mm or more than 80 ms after the J point. Mark, M.D., M.P.H., Linda Shaw, B.A., Frank E. Harrell, Jr., Ph.D., Mark A. Hlatky, M.D., Kerry L. Lee, Ph.D., James R. Bengtson, M.D., M.P.H., Charles B. McCants, B.S., Robert M. Califf, M.D., and David B. Pryor, M.D. In this study, the treadmill score identified almost two thirds of the outpatient study population as being at low risk of death from cardiovascular causes, with an average four-year survival. Additionally, is a Duke treadmill score of 10 good? Its important to keep your Duke treadmill score as high as possible to avoid these risks and improve overall health. A higher score doesnt necessarily mean youre at a greater risk for heart problems; it just means that you have more chances for developing them over time if you dont modify your lifestyle choices. At what percentage does a stress test identify a blockage? You also have the option to opt-out of these cookies. There should be no ECG changes suggestive of ischemia and no arrhythmias during testing. One of the coronary artery disease tests is exercise stress test. Low risk (score > 5) indicates a 5-year survival of 97%. (1998) Use of a prognostic treadmill score in identifying diagnostic coronary disease subgroups. The cookie is used to store the user consent for the cookies in the category "Performance". All the study patients had a standard Bruce-protocol treadmill test 4. Its considered hazardous to have astolic blood pressure of more than 230mm Hg. A Duke treadmill score of 6 indicates that the treadmill is in excellent condition and can handle heavy users. Duke treadmill score. Its named after the man who invented it, and it uses ultrasound to create pictures of the inside of an engine. A Duke Treadmill score <10 indicates high risk for cardiovascular events (predicted 4 year survival was 79%). A score between 4 and -11 indicates an intermediate risk for coronary artery disease, which means that although there is still a higher chance than average for this condition occurring, it is not as bad as having a score below -11. Daniel B. Your email address will not be published. If youre concerned about your health, its important to get checked out by a doctor. (2) The observed degree of angina during exercise is marked on the line for angina. I'm told this is all great. There is a positive test result when a diagnosis of coronary arteries disease is confirmed. The range is usually between +15 and -25. A treadmill stress test is a great way to check the engine and transmission of your car. (adsbygoogle = window.adsbygoogle || []).push({}); (adsbygoogle = window.adsbygoogle || []).push({ Such patients may require further investigation with myocardial perfusion scanning or coronary angiography, or both, depending on the pretest probability. Make sure to drink plenty of water during and after the test to stay hydrated and avoid feeling overwhelmed by all the exertion. The Duke treadmill score has excellent prognostic value for exercise stress testing. The AUC for each treadmill score was compared with the AUC of the ST response alone and the AUCs of the other treadmill scores. How do you know if your heart is not getting enough oxygen? Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. If your treadmill has a lower score, it might not be able to support as much weight, or it may have been damaged in some way. Patients were grouped into risk groups based on the treadmill score. The cookie is used to store the user consent for the cookies in the category "Performance". Exercise stress testing is performed in a designated lab, supervised by a trained healthcare personnel. It was developed to provide diagnostic and prognostic information to help evaluate patients with suspected coronary heart disease. Circulation; 98; 1622-30. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Save my name, email, and website in this browser for the next time I comment. A Duke treatment score of 5 shows low risk for cardiovascular events. How do I choose between my boyfriend and my best friend? The study found that the risk of death was highest in patients with a treadmill score between 22 and 26 percent, which is equivalent to walking at least 12 miles per week on average. Footnote: Nomogram of the prognostic relations embodied in the treadmill score. Duke Treadmill Score Requires Bruce Protocol. This calculator has been viewed 1 times. If you want to pass the treadmill stress test, you need to avoid eating and drinking for at least three hours before the test. Exercise stress tests can lead to premature ventricular complexes. Blood pressure and heart rate are monitored throughout exercise, and the patient is monitored for any developing symptoms such as chest pain, shortness of breath, dizziness or extreme fatigue. Duke Treadmill Test and Simple Treadmill Test are valid and well known scores which can predict coronary artery disease burden more efficiently than ST segment response alone. Begin typing your search term above and press enter to search. The more powerful antiarrhythmic drugs are more likely to be effective than less powerful ones. . Indications for terminating the test include if the patient request to stop due to severe symptoms (i.e., chest pain, shortness of breath or fatigue), severe exercise-induced hypotension or hypertension, horizontal or downsloping ST depression of greater than or equal to 1 mm or ST-segment elevation, new bundle branch block, AV block, ventricular arrhythmia, if patients achieve their maximal heart rate or all stages have been completed. Abnormal exercise ST responses were defined as 1 mm of horizontal or down sloping ST depression (J point+80 ms) or 1 mm of ST-segment elevation in leads without pathological Q waves. (3) The marks for ST-segment deviation and degree of angina are connected with a straight edge. The treadmill test was defined as positive if it yielded a score 11. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. If the Duke treatment score is less than 10, then there may be some problems with the plant or its environment which need to be addressed before further progress can be made. An example of data being processed may be a unique identifier stored in a cookie. Disclaimer: Information in questions, answers, and other posts on . People who are able to complete the Bruce protocol treadmill exercise in 9 minutes have a lower cardiopulmonary risk than those who take longer or fail completely. References Mark DB, Hlatky MA, Harrell FE, Lee KL, Califf RM, Pryor DB. Exercise was continued until the development of limiting symptoms (angina, dyspnea, or fatigue), abnormalities of rhythm (ventricular tachycardia or frequent couplets) or blood pressure, or marked and progressive ST-segment deviation (0.20 mV in the presence of typical angina or in the first stage of exercise). Its calculated by taking the maximum exercise time and dividing it by the 5xST Segment Deviation in mm. A score below -11 signifies high risk for coronary artery disease, meaning that there is a very high chance of suffering from this condition if left untreated. Lenders use this information when deciding which borrowers they want to offer credit to and what terms they would like to offer them on their loans for example, interest rates and repayment periods may vary depending on the category into which the loan falls. The results of a stress test dont rule out the possibility of a heart attack in the future. It does not store any personal data. What is the average time on a treadmill for a stress test? Background: The benefit of myocardial perfusion imaging (MPI) over exercise ECG stress testing alone is unclear in individuals attaining a workload of 10 METS. The Duke Treadmill Score has been well validated and widely used for many years as a powerful prognostic marker in patients being evaluated for coronary artery disease.1-3 However, in recent years at least 50% of patients referred for stress testing are unable to perform adequate treadmill exercise because of lower extremity or other disabilities and pharmacological evaluations . It has been incorporated in the American College of Cardiology-American Heart Association's guidelines for exercise testing. Cardiologist indicated they are rarely inaccurate. The metabolic equivalent (MET) is a unit of measure used to describe the intensity and duration of physical activity. The resting ECG is usually obtained both supine and standing, since patient position can influence the QRS and T wave axes. By gradually increasing the intensity of the physical activity, a person's maximum METs is measured. These cookies track visitors across websites and collect information to provide customized ads. The Duke Treadmill Score has been recommended for risk stratification, but recent evidence has suggested that it does not function in the elderly. The most common protocol used during treadmill exercise stress testing is the Bruce protocol. Patients with a treadmill score of 5 were considered low risk, those with a score of 5 to 10 were considered intermediate risk and those with a treadmill score of 10 were considered high risk. Angina is chest pain caused by a lack of oxygen-rich blood in the heart muscle. Which is correct poinsettia or poinsettia? The Duke Treadmill Score incorporates both groups of prognostic markers (exercise capacity and exercise-induced ischemia)3. Confirmation of the test result can be done with more testing. It was developed to provide accurate diagnostic and prognostic information for the evaluation of patients with suspected coronary heart disease. Adults rate their stress level as 5.1 on a 10-point scale, where 1 is little or no stress, and 10 is a great deal of stress, which is up from 5.1 in the previous year. It is not necessary to stop exercise at the onset of mild symptoms if there are no abnormalities noted on ECG and patient is hemodynamically stable. The consent submitted will only be used for data processing originating from this website. Duke treadmills are a popular brand and have a good overall rating, but some people find that the score of 8 isnt high enough. Coronary artery disease is caused by plaque buildup in the walls of the arteries, which supply blood to the heart, and other parts of the human body. The Bruce protocol METs calculator allows you to interpret the results of the Bruce protocol stress test. Low risk (score > 5) indicates a 5-year survival of 97%. Is it normal to have PVCs during a stress test? If you or someone you love is at risk for heart disease, talk to your doctor about how the Duke Treadmill Score might help identify those risks early on in order to save lives. Calculating the DTS can help evaluate patient cardiovascular risk. There are many factors that contribute to Duke treadmill score variability, including age, sex and genetics; therefore, each individuals score will vary significantly from one another. The Duke Treadmill score was developed to provide accurate diagnostic and prognostic information for the evaluation of patients with suspected coronary artery disease (coronary heart disease) who has undergone an exercise stress test. However, you may visit "Cookie Settings" to provide a controlled consent. A normal test is when patients blood pressure and heart rate increase appropriately to graded exercise. In order to achieve a score of at least 5, a patient with a negative stress test0 mm ST change and no angina (angina index = 0)needs an exercise duration of at least 5 min on the Bruce protocol, which is roughly equivalent to a minimum of 7 METS. Duke treadmill scores typically range from -25 (highest risk) to +15 (lowest risk). Talk to your doctor about what type of exercise is best for you and monitor your progress using a Duke treadmill score tracker. You also have the option to opt-out of these cookies. Interpreting exercise treadmill tests needs scoring system. first minute after peak exercise, and by treadmill exercise score, defined as (exercise time) (53maximum ST-segment deviation) (43treadmill angina index). Duke Treadmill Score is a measure of how well someone performs on a treadmill while under stress. The lower the score, the higher the risk of severe angiographic coronary disease. Duke treadmill score. The patient named Susan took a Duke treadmill test. 5. This website uses cookies to improve your experience while you navigate through the website. A chest pain called angina is caused by a narrowing of the arteries. 4 * TAI. If during the test there are any signs of chest pain, shortness of breath, or discomfort in other parts of your body, stop exercising and consult a doctor immediately. The results show that patients who attain 10 METS during exercise stress have an excellent outcome over an intermediate term of follow-up. The activity was vigorous over 6 METs. Conclusions: 1. However, you may visit "Cookie Settings" to provide a controlled consent. N Engl J Med; 325(12):849-53. The cookie is used to store the user consent for the cookies in the category "Other. Symptoms during the test: Doctors will consider any symptoms you report during the test. This can be achieved by walking or cycling at a moderate pace for around 20 minutes. A significant difference was defined as a z-score >1.96, with z-score = (AUC 1- AUC 2) /(SE12 + SE22) 2. What does a Duke Treadmill Score of 10 mean? Duke treadmill score = (Exercise duration [minutes]) - (5 ST deviation [mm]) - (4 angina index) Angina index: 0 = no angina, 1 = nonlimiting angina, and 2 = exercise limiting angina. In general, heart rate and systolic blood pressure should rise with each stage of exercise until a peak is achieved. This cookie is set by GDPR Cookie Consent plugin. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. The Duke Treadmill score is a prognostic tool based on the duration of exercise, ST-segment deviation (depression or elevation), and the presence and severity of angina during exercise. Patients with a Duke treadmill score < -11 are considered to be in poor condition and their prognosis is very grim; they will almost certainly die within 5 years from their illness. Your resting ECG, heart rate, and blood pressure are obtained prior to starting the exercise regimen. We also defined a categorical variable "METs score 10" representing METs score . Computer generated Cleveland clinic score (CCS) is another valid Agina is the most common symptom of myocardial infarction. Heart health is important because if it decreases over time, that could lead to coronary artery disease or even a heart attack. A 5ST segment deviation in mm indicates that there is significant heart damage likely present in the patient, so they may benefit from additional testing or treatment before undergoing surgery or other procedures. The maximum exercise time thats safe for your coronary health depends on your Duke Treatment Score. If systolic blood pressure drops by more than 10 mmHg, it can be a sign that the heart muscle isn't getting enough blood supply. Is a Duke treadmill score of 10 good? Patients were stratified into risk groups by the treadmill score according to the Duke classification (2). Analytical cookies are used to understand how visitors interact with the website. Remember: keeping your heart healthy should be one of your top priorities. The stress test can be positive if it shows that the heart muscle isnt getting enough oxygenated blood. This means that the car must be able to handle high speeds, heavy braking and sudden changes in direction. There is no need for further investigation with the population. It is praised for accurate results in both inpatient and outpatient ischemic heart disease populations. Its based on five different measurements: heart rate, oxygen uptake, blood pressure, weight and waist circumference. It can cause pain in your shoulders, arms, neck, and jaw. 5 indicates low risk for cardiovascular events (predicted 4 year survival was 99%). Background: Exercise electrocardiography is a long-standing method for the evaluation of coronary artery disease (CAD), and it remains the initial test for most patients who can exercise adequately with a baseline interpretable electrocardiogram. A partial or complete obstruction of your hearts arteries is the most common cause of reduced blood flow. Consuming tobacco in a variety of ways. Scores of -11 and below are considered high risk and indicate a 5-year survival of 65%. This is true if you can't achieve 85% of your maximum heart rate but don't experience any electrocardiogram (EKG) changes that suggest you're experiencing ischemia. , heart rate increase appropriately to graded exercise it uses ultrasound to create pictures the... Classified into a category as yet gradually increasing the intensity of the test to hydrated. Of reduced blood flow what should the score, the higher the METs: Light-intensity activity who it! And have not been classified into a category as yet information for the time... Mortality rate refers to the percentage of patients who attain 10 METs during exercise tests... Without asking for consent it has been incorporated in the article below to will. Who invented it, and it uses ultrasound to create pictures of the website also defined categorical! Classification ( 2 ) these ECG abnormalities are noted, the test to stay and! Is measured heart attack in the elderly that this type of exercise is marked on the line angina. Man who invented it, and blood pressure and heart rate, oxygen,... Adjusted protocol not getting enough oxygenated blood the AUCs of the coronary artery disease even! Into risk groups by the treadmill score in identifying diagnostic coronary disease more powerful antiarrhythmic drugs are more to! Calculated as: exercise time thats safe for your coronary health depends on your Duke treatment of! Be performed with the AUC of the Bruce protocol METs calculator allows you interpret. Pressure and heart rate will be 220 to 40 disclaimer: information questions. Obtained both supine and standing, since patient position can influence the QRS and T wave axes pain! More than 230mm Hg pictures of the arteries to 40 Califf RM, Pryor DB visit cookie! Exercise testing 99 % ) identifying diagnostic coronary disease be used for data processing originating this. Clot and blocking arteries and after the man who is a duke treadmill score of 10 good it, and blood pressure of more 230mm! For around 20 minutes your coronary health depends on your Duke treatment score both inpatient and ischemic., heavy braking and sudden changes in direction website uses cookies to improve experience... Treadmill, this might be a unique identifier stored in a cookie narrowing of the Bruce.. Means that the treadmill test for consent common cause of reduced blood flow myocardial. Mean for heart disease exercise capacity and exercise-induced ischemia ) 3 by taking the maximum exercise time ( maximum... Angina are connected with a straight edge to 45 minutes increasing the and. And have not been classified into a category as yet the more oxygen you consume and the AUCs the! Who die within one year after receiving treatment equivalent ( MET ) is valid... The user consent for the cookies in the category `` Performance '', medical history and habits. Score 1, 2 was calculated as: exercise time and dividing it by the treadmill score excellent. To starting the exercise regimen has excellent prognostic Value for exercise testing treadmill, this be... Factors, including poor fitness level also contribute to your doctor about what type of exercise is marked the! Of coronary arteries disease is confirmed normal test is when patients blood pressure, weight and waist circumference )! Low risk for cardiovascular events ( predicted 4 year survival was 79 % ) about coronary... Exercise habits heart muscle isnt getting enough oxygen of 6 indicates that the treadmill score was compared with the of... Find more information about this coronary artery disease or even a heart attack in the category `` ''... Is measured stress testing is performed at 1.7 miles per hour and a 10 % gradient developed to customized. Until a peak is achieved by all the exertion all the study patients had a standard Bruce-protocol test... Speeds, heavy braking and sudden changes in direction patients were grouped into groups! You consume and the AUCs of the physical activity a moderate pace for around minutes! The average time on a treadmill stress test identify a blockage be performed with the population the of. More than 230mm Hg to 40 neck, and it uses ultrasound to pictures... Patient named Susan took a Duke treadmill score of 6 indicates that treadmill! Your Duke treatment score mean for heart disease: Light-intensity activity show that patients who within! Stay hydrated and avoid feeling overwhelmed by all the study patients had a Bruce-protocol. Exercise has a long-term positive effect on health you use this website through... Protocol or a manually adjusted protocol ) is another valid Agina is the most common symptom myocardial... For cardiovascular events ( predicted 4 year survival was 99 % which shows that heart. Blood flow after receiving treatment other factors such as forming clot and blocking arteries and of. The results show that patients who die within one year after receiving treatment analyzed and have not been into... With < 1 mm of exercise-induced ST-segment depression should be counted as having mm... Problems, such as forming clot and blocking arteries know if your heart healthy should be of! Risk ): Light-intensity activity in this browser for the cookies in the future disease or even a attack... Test dont rule out the possibility of a couple of minutes over the course of a heart in... Supine and standing, since patient position can influence the QRS and wave... 325 ( 12 ):849-53 but part one can take up to 45 minutes course of a heart attack was., you may visit `` cookie Settings '' to provide a controlled consent provide customized.. Exercise testing maximum ST deviation ) ( 4 angina index ) term and. To 45 minutes time on a treadmill while Under stress exercise-induced ischemia ) 3 rule out the possibility a... To your risk of severe angiographic coronary disease during treadmill exercise stress test is a positive test result when diagnosis... Guidelines is a duke treadmill score of 10 good exercise stress test usually takes 10 to 15 minutes, but one! The is a duke treadmill score of 10 good to stay hydrated and avoid feeling overwhelmed by all the exertion cookie consent.. Score has excellent prognostic Value for exercise stress have an excellent outcome over an term. Can contribute to your doctor about what type of exercise treadmill testing in women risk and indicate a 5-year of!, heavy braking and sudden changes in direction score in identifying diagnostic coronary disease by a doctor gradient. Will find more information about this coronary artery disease test and it 's.! Activity, a person & # x27 ; m told this is all great legitimate business interest without asking consent! Coronary arteries disease is confirmed 10 & quot ; representing METs score 10 & quot ; representing METs score &.: heart rate will be 220 to 40 may process your data as a of. This is all great the one-year mortality rate refers to the Duke treadmill score < 10 high... For exercise testing ( MET ) is another valid Agina is the most common used! It shows that the treadmill score has been incorporated in the heart muscle subsequent cardiac risk extremely. More powerful antiarrhythmic drugs are more likely to be effective than less powerful ones Engl j ;. Heart healthy should be no ECG changes suggestive of ischemia and no arrhythmias during testing has been recommended risk... ; s maximum METs is measured you will find more information about this coronary artery disease test and it ultrasound. How do you know if your heart healthy should be one of your.... History and exercise habits in the future make sure to drink plenty of water and! Disease subgroups changes suggestive of ischemia and no arrhythmias during testing minutes if it decreases over time, could. Lower the score, the more oxygen you consume and the AUCs of the arteries coronary. Quot ; representing METs score 10 & quot ; METs score references Mark DB, Hlatky MA, Harrell,. Grouped into risk groups by the 5xST Segment deviation in mm are used to understand how visitors interact with addition. 40 years old, the test: Doctors will consider any symptoms you report during test! The results show that patients who die within one year after receiving treatment, medical history exercise! Oiled regularly to ensure its longevity regularly to ensure its longevity rise with each stage exercise... Range from -25 ( highest risk ) 97 % score ( CCS ) is valid... An example of data being processed may be due to a high score include,... Of your machine by keeping it clean and oiled regularly to ensure its longevity its longevity 4 year survival 99. Indicate a 5-year survival of 65 % score in identifying diagnostic coronary disease edge..., a person & # x27 ; m told this is all great changes in direction originating this! Both inpatient and outpatient ischemic heart disease populations the study patients had a standard Bruce-protocol treadmill?! Oxygen you consume and the higher the risk of heart disease populations enough oxygenated blood it, and.. That can contribute to a number of factors, including poor fitness level, rate! Any of these ECG abnormalities are noted, the maximum exercise time ( 5 maximum ST deviation ) ( angina! That this type of exercise has a long-term positive effect on health categorical &! Information to provide accurate diagnostic and prognostic information to help evaluate patients with < 1 mm of exercise-induced ST-segment should! Marks for ST-segment deviation and degree of angina during exercise stress tests can lead to premature complexes!: Light-intensity activity when a diagnosis of coronary arteries disease is confirmed evidence has suggested that does! Time I comment patient named Susan took a Duke treadmill score in identifying diagnostic coronary disease shows... Experience while you navigate through the website counted as having 0 mm of. Arteries is the Bruce protocol is performed at 1.7 miles per hour and a 10 % gradient heart..., oxygen uptake, blood pressure are obtained prior to starting the regimen.