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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
Cardiopulmonary Resuscitation I: Adult01:21

Cardiopulmonary Resuscitation I: Adult

Cardiopulmonary resuscitation, or CPR, is a life-saving emergency procedure performed when a person's heart has stopped beating or they are no longer breathing. The foundation of CPR is Basic Life Support (BLS), which focuses on the early recognition of cardiac arrest, the immediate start of high-quality chest compressions, and the timely use of an automated external defibrillator (AED).Assessing Responsiveness and Checking the Carotid PulseWhen approaching an unresponsive person, first ensure...
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
Introduction Cardiac Emergencies01:30

Introduction Cardiac Emergencies

Cardiac emergencies are critical situations involving the heart that require immediate medical intervention to prevent severe complications or death. These emergencies often arise from underlying heart conditions that impair the heart's ability to function correctly.Types of Cardiac EmergenciesThe most common types of cardiac emergencies include Acute Coronary Syndrome (ACS), myocardial infarction (MI), cardiac arrest, and heart failure.Acute Coronary Syndrome (ACS)Acute Coronary Syndrome (ACS)...
Pyloric Obstruction01:11

Pyloric Obstruction

Pyloric obstruction, also referred to as gastric outlet obstruction, is a condition characterized by narrowing or blockage at the pylorus—the muscular valve regulating the flow of stomach contents into the duodenum. When this passage becomes impaired, the stomach cannot effectively empty its contents into the small intestine. This disruption leads to a range of gastrointestinal symptoms, including early satiety, bloating, epigastric pain, postprandial nausea, persistent vomiting, and...
Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...

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Updated: May 23, 2026

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
14:09

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance

Published on: March 21, 2013

A 9-year-old boy with exertional syncope.

Kathleen E Walsh1, Lindsay K Sanders, Joshua C Ross

  • 1Department of Internal Medicine, Division of Emergency Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin 53792, USA.

The Journal of Emergency Medicine
|March 27, 2012
PubMed
Summary
This summary is machine-generated.

Exertional syncope in children can signal serious heart conditions, not just benign fainting. Early cardiac evaluation is crucial to prevent sudden cardiac death in pediatric patients.

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Last Updated: May 23, 2026

Tilt Testing with Combined Lower Body Negative Pressure: a "Gold Standard" for Measuring Orthostatic Tolerance
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Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
07:26

Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans

Published on: October 17, 2018

Area of Science:

  • Pediatric Cardiology
  • Cardiovascular Disease
  • Clinical Pediatrics

Background:

  • Syncope is common in children, usually benign.
  • A subset of pediatric syncope cases indicate life-threatening cardiac abnormalities.
  • Exertional syncope is a critical symptom requiring thorough cardiac investigation.

Observation:

  • A 9-year-old boy experienced exertional syncope during physical education.
  • This was his second episode of exercise-induced syncope within two years.
  • No family history of sudden cardiac death or cardiac disease was reported.

Findings:

  • Transthoracic echocardiogram revealed an anomalous left coronary artery.
  • Anomalous coronary arteries are a rare but serious cause of pediatric syncope.
  • This condition can present as sudden cardiac death in children.

Implications:

  • Pediatric exertional syncope warrants comprehensive cardiac evaluation.
  • Identifying cardiac etiologies like anomalous coronary arteries is vital.
  • Prompt diagnosis and management can prevent sudden cardiac death in pediatric patients.