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Related Concept Videos

Exercise Stress Test01:26

Exercise Stress Test

Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
Angina III: Clinical Manifestations and Assessment01:29

Angina III: Clinical Manifestations and Assessment

Angina manifests as chest pain, tightness, or squeezing discomfort typically located behind the breastbone. It can radiate to the neck, jaw, shoulders, and inner aspects of the upper arms, most commonly the left arm. Patients may experience shortness of breath, fatigue, profuse sweating, dizziness, indigestion, heartburn, palpitations, anxiety, and vomiting as accompanying symptoms. This pain often lasts a few minutes and is triggered by physical exertion, emotional stress, heavy meals, or cold...
Atherosclerosis II: Clinical Manifestations and Diagnostic Tests01:27

Atherosclerosis II: Clinical Manifestations and Diagnostic Tests

Atherosclerosis is a progressive disorder that leads to the thickening and narrowing of arterial walls due to plaque buildup. This condition can cause various symptoms depending on the arteries affected:Coronary Artery Disease (CAD): This condition affects the coronary arteries and may lead to chest pain (angina), shortness of breath (dyspnea), heart attacks, and other heart disease symptoms.Cerebrovascular Disease: This affects blood flow to the brain, causing transient ischemic attacks (TIAs)...

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Related Experiment Video

Updated: Jun 26, 2026

Primary Outcome Assessment in a Pig Model of Acute Myocardial Infarction
14:19

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Published on: October 14, 2016

Localizing coronary artery obstructions with the exercise treadmill test.

D B Mark, M A Hlatky, K L Lee

    Annals of Internal Medicine
    |January 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    ST elevation during exercise tests reliably indicates coronary artery lesions, unlike ST depression which is not a reliable indicator. This finding aids in diagnosing coronary artery disease location.

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    Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function

    Published on: March 15, 2022

    Area of Science:

    • Cardiology
    • Diagnostic Imaging
    • Exercise Physiology

    Background:

    • Exercise stress testing is crucial for diagnosing coronary artery disease (CAD).
    • Interpreting electrocardiogram (ECG) changes during exercise, specifically ST segment shifts, is key to localizing coronary lesions.
    • The diagnostic value of ST depression versus ST elevation in pinpointing lesion location requires further clarification.

    Purpose of the Study:

    • To evaluate the reliability of ST segment depression and elevation patterns during exercise testing for identifying the location of coronary artery lesions.
    • To differentiate the diagnostic utility of ST elevation versus ST depression in patients with one-vessel coronary artery disease.

    Main Methods:

    • A study of 452 consecutive patients with one-vessel coronary artery disease who underwent treadmill testing.
    • Classification of exercise-induced ST segment changes into elevation or depression.
    • Analysis of ST changes based on the specific ECG lead groups involved.

    Main Results:

    • ST depression during exercise was commonly observed in leads V5 or V6, irrespective of the affected coronary artery.
    • Anterior ST elevation accurately predicted left anterior descending coronary artery disease in 93% of cases.
    • Inferior ST elevation accurately predicted lesions in or proximal to the posterior descending artery in 86% of cases.
    • Anterior ST elevation patterns correlated with stenosis severity and occlusion status of the left anterior descending artery.

    Conclusions:

    • ST elevation during exercise testing, though infrequent, serves as a dependable indicator for the location of underlying coronary artery lesions.
    • ST depression during exercise testing is not a reliable indicator for localizing coronary artery lesions.