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Related Concept Videos

Exercise Stress Test01:26

Exercise Stress Test

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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
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Electrocardiogram01:29

Electrocardiogram

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An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
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Cardiac Action Potential01:30

Cardiac Action Potential

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Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
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Electrocardiogram Fundamentals01:28

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An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
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An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...
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Assessment of apical radial pulse01:25

Assessment of apical radial pulse

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Apical-Radial (A-R) Pulse Assessment
The A-R pulse assessment involves simultaneous evaluation of the apical and radial pulses. When the apical and radial pulse rates vary, this assessment helps identify a pulse deficit.
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Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

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The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
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Related Experiment Video

Updated: Apr 23, 2026

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
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T-wave reversion in pediatric patients during exercise stress testing.

Walter J Hoyt1, Kipp B Ardoin, Bryan C Cannon

  • 1Department of Pediatrics, Division of Pediatric Cardiology, University of Virginia, Charlottesville, Va, USA.

Congenital Heart Disease
|September 27, 2014
PubMed
Summary

Exercise stress testing (EST) in children with normal hearts and lateral T-wave inversion on resting ECGs shows T-wave reversion in most patients. This suggests EST is safe and effective for evaluating these pediatric cardiac findings.

Keywords:
ECG AbnormalityExercise Stress TestT-wave Inversion

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Area of Science:

  • Pediatric Cardiology
  • Electrocardiography
  • Exercise Physiology

Background:

  • Lateral T-wave inversion on resting electrocardiograms (ECG) in children can be concerning for cardiac pathology.
  • However, many pediatric patients with this finding have structurally normal hearts.
  • Evaluating the significance of resting T-wave abnormalities in this population is crucial.

Purpose of the Study:

  • To assess the T-wave response during exercise stress testing (EST) in pediatric patients.
  • To evaluate children with structurally normal hearts who exhibit lateral-lead T-wave inversion on their resting ECG.
  • To determine the diagnostic utility of EST in this specific pediatric subgroup.

Main Methods:

  • Retrospective review of exercise stress testing (EST) databases from two centers.
  • Inclusion criteria: pediatric patients (<18 years) with normal exam/echocardiogram, no chest pain, and lateral-lead T-wave inversion on resting ECG.
  • Patients underwent treadmill or cycle ergometer EST; T-wave reversion was categorized as complete, partial, or none.

Main Results:

  • 14 pediatric patients (9 female, 5 male; avg. age 16) were identified.
  • Complete T-wave reversion occurred in 79% of patients, partial in 14%, and none in 7%.
  • No complications or adverse outcomes were observed during EST or 2-year follow-up.

Conclusions:

  • Exercise stress testing (EST) is a valuable tool for evaluating pediatric patients with lateral-lead T-wave inversion and normal cardiac structure.
  • The vast majority of these patients demonstrate complete or partial T-wave reversion during EST.
  • EST appears safe and effective in reassuring normal cardiac function in this pediatric population.