Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Assessment of Ventilation I: Respiratory Rate01:20

Assessment of Ventilation I: Respiratory Rate

Assessment of Ventilation
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
Factors Influencing Heart Rate01:30

Factors Influencing Heart Rate

The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

Cardiac Output I:Effect of Heart Rate on Cardiac Output

Cardiac Output
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart rate...
Ventilatory Modes01:14

Ventilatory Modes

Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
Exercise and Cardiac Output01:17

Exercise and Cardiac Output

Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be met...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

[Surgical emphysema reduction: A viable alternative in the era of endobronchial valves].

Revue des maladies respiratoires·2025
Same author

[Giant Ossifiant Fibrome Of The Mandibule In The Adolescent At The National Center D'odonto-Stomatologie Of Bamako].

Le Mali medical·2024
Same author

[Prescription And Delivery's Survey Of Benzodiazepines In The Occurrence Of Addictions At Mbour's District].

Le Mali medical·2022
Same author

CGRP and Shh Mediate the Dental Pulp Cell Response to Neuron Stimulation.

Journal of dental research·2022
Same author

[Congenital analbuminemia complicated by relapsing acute coronary syndrome : A case report and literature review].

Annales de cardiologie et d'angeiologie·2021
Same author

Detection of Crimean-Congo hemorrhagic fever virus in blood-fed Hyalomma ticks collected from Mauritanian livestock.

Parasites & vectors·2021

Related Experiment Video

Updated: May 8, 2026

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
09:24

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

Published on: January 28, 2020

Early ventilation-heart rate breakpoint during incremental cycling exercise.

G Gravier1, S Delliaux1, A Ba2

  • 1UMR MD2 Faculty of Medicine, Aix Marseille University, Marseille, France.

International Journal of Sports Medicine
|August 16, 2013
PubMed
Summary

Early exercise reveals transient hypoxia, triggering distinct heart rate (HR) and ventilation breakpoints before significant lactate accumulation or ventilatory threshold during incremental cycling.

More Related Videos

Assessment of Pulmonary Capillary Blood Volume, Membrane Diffusing Capacity, and Intrapulmonary Arteriovenous Anastomoses During Exercise
07:09

Assessment of Pulmonary Capillary Blood Volume, Membrane Diffusing Capacity, and Intrapulmonary Arteriovenous Anastomoses During Exercise

Published on: February 20, 2017

Impedance Pneumography for Minimally Invasive Measurement of Heart Rate in Late Stage Invertebrates
08:25

Impedance Pneumography for Minimally Invasive Measurement of Heart Rate in Late Stage Invertebrates

Published on: April 4, 2020

Related Experiment Videos

Last Updated: May 8, 2026

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
09:24

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

Published on: January 28, 2020

Assessment of Pulmonary Capillary Blood Volume, Membrane Diffusing Capacity, and Intrapulmonary Arteriovenous Anastomoses During Exercise
07:09

Assessment of Pulmonary Capillary Blood Volume, Membrane Diffusing Capacity, and Intrapulmonary Arteriovenous Anastomoses During Exercise

Published on: February 20, 2017

Impedance Pneumography for Minimally Invasive Measurement of Heart Rate in Late Stage Invertebrates
08:25

Impedance Pneumography for Minimally Invasive Measurement of Heart Rate in Late Stage Invertebrates

Published on: April 4, 2020

Area of Science:

  • Exercise Physiology
  • Cardiopulmonary Responses
  • Metabolic Stress

Background:

  • Transient hypoxia may occur at the onset of incremental exercise.
  • Investigating early physiological responses during exercise is crucial for understanding performance limitations.

Purpose of the Study:

  • To determine if ventilatory and heart rate (HR) breakpoints occur concurrently with transient hypoxia at exercise onset.
  • To compare the timing of these early breakpoints with established markers like the ventilatory threshold and lactate threshold.

Main Methods:

  • 33 subjects performed maximal incremental cycling exercise.
  • Continuous monitoring of HR, ventilation (VE), tidal volume (VT), VT/Ti, and end-tidal gases (PETO2, PETCO2).
  • In a subset (n=10), transcutaneous PtcO2 and blood lactate (LA) were measured.

Main Results:

  • A transient decrease in PETO2 and PtcO2 was observed at exercise onset.
  • Significant increases in VE, VT, VT/Ti, and HR occurred at the PO2 nadir, indicating early breakpoints.
  • These HR and ventilatory breakpoints appeared significantly earlier (33% VO2max) than the ventilatory threshold (67% VO2max) and lactate threshold (45-50% VO2max).

Conclusions:

  • Heart rate and ventilatory breakpoints coincide with transient hypoxia at the start of incremental exercise.
  • These early physiological events precede the development of the ventilatory and lactate thresholds.
  • This suggests an early adaptive response to modest hypoxia and hypercapnia during exercise initiation.