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Related Concept Videos

Asthma-IV: Diagnostic and Management01:30

Asthma-IV: Diagnostic and Management

The diagnosis and management of asthma are comprehensive, encompassing clinical assessments, lung function tests, and pharmacological interventions. Here's an overview:
Clinical Assessment for Asthma:
This is the first step in diagnosing and managing asthma. It includes:
Asthma III: Clinical Manifestations01:13

Asthma III: Clinical Manifestations

Asthma presents with a characteristic pattern of episodic respiratory symptoms that reflect underlying airway inflammation, bronchoconstriction, and mucus hypersecretion. Although severity varies among individuals, certain clinical manifestations are considered hallmarks of the disorder and often guide diagnosis and assessment.Respiratory SymptomsA persistent cough is one of the most common early features of asthma. It is frequently dry and tends to worsen at night or in the early morning,...
Asthma-I: Introduction01:29

Asthma-I: Introduction

Asthma is a chronic respiratory ailment that requires careful management due to its varying symptoms and influencing factors. It is characterized by airway inflammation, bronchial hyperresponsiveness, and reversible airflow obstruction, leading to symptoms like wheezing, shortness of breath, chest tightness, and coughing. The symptom frequency and intensity may vary considerably over time. It is also linked to immune system responses to allergens and irritants, highlighting the complex...
Asthma I: Introduction01:28

Asthma I: Introduction

Asthma is a chronic inflammatory disorder of the airways characterized by variable airflow obstruction and heightened bronchial responsiveness to a wide range of triggers. The underlying inflammation leads to airway swelling, mucus hypersecretion, and smooth muscle constriction, all of which narrow the airway lumen and impede airflow. Clinically, asthma presents with recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing, symptoms that typically vary in intensity and...
Asthma: Pathogenesis and Management01:20

Asthma: Pathogenesis and Management

Asthma is a chronic pulmonary condition involving inflammation of the airways, hyper-reactivity, and reversible obstruction of the airways. This condition can significantly impact a person's quality of life, making breathing difficult and leading to distressing symptoms.
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
Asthma-II: Pathophysiology and Classification01:26

Asthma-II: Pathophysiology and Classification

Asthma is a prevalent chronic respiratory condition marked by inflammation and hyperresponsiveness of the airways. Its pathophysiology involves complex interactions among inflammatory pathways, immune responses, and neural mechanisms.
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:

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Related Experiment Video

Updated: May 24, 2026

Home-Based Prescribed Pulmonary Exercise in Patients with Stable Chronic Obstructive Pulmonary Disease
07:10

Home-Based Prescribed Pulmonary Exercise in Patients with Stable Chronic Obstructive Pulmonary Disease

Published on: August 24, 2019

How to diagnose exercise induced asthma?

Zarqa Ali1

  • 1Copenhagen University, Denmark. zarqa_ali@hotmail.com

Asian Journal of Sports Medicine
|March 1, 2012
PubMed
Summary

Exercise induced asthma (EIA) is diagnosed using the eucapnic voluntary hyperpnea (EVH) test. This sensitive and specific method accurately measures airway obstruction, outperforming the methacholine challenge test.

Area of Science:

  • Pulmonology
  • Exercise Physiology
  • Diagnostic Medicine

Background:

  • Exercise induced asthma (EIA) causes temporary airway resistance after intense physical activity, indicated by reduced forced expiratory volume in one second (FEV1).
  • Triggers for EIA include increased training intensity and breathing cold, dry air.

Purpose of the Study:

  • To evaluate the diagnostic efficacy of the eucapnic voluntary hyperpnea (EVH) challenge test for exercise induced asthma.
  • To compare the EVH test with the methacholine challenge test for diagnosing EIA.

Main Methods:

  • The eucapnic voluntary hyperpnea (EVH) test simulates EIA by having patients hyperventilate dry gas.
  • This method aims to replicate the airway obstruction experienced during exercise in cold, dry air conditions.
Keywords:
Asthma Exercise-InducedAthletesBronchospasmDiagnosisExercise

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Murine Model of Allergen Induced Asthma
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Murine Model of Allergen Induced Asthma

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Last Updated: May 24, 2026

Home-Based Prescribed Pulmonary Exercise in Patients with Stable Chronic Obstructive Pulmonary Disease
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Published on: August 24, 2019

Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber
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Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber

Published on: March 3, 2023

Murine Model of Allergen Induced Asthma
08:05

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Published on: May 14, 2012

Main Results:

  • The EVH test demonstrated high sensitivity and specificity in diagnosing exercise induced asthma.
  • The EVH test effectively induces airway obstruction comparable to exercise in cold, dry air.

Conclusions:

  • The eucapnic voluntary hyperpnea (EVH) test is a highly sensitive and specific method for diagnosing exercise induced asthma.
  • The EVH test is a superior diagnostic tool for EIA compared to the traditional methacholine challenge test.