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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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Factors Influencing Heart Rate01:30

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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,...
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Hypertension II: Pathophysiology01:29

Hypertension II: Pathophysiology

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Hypertension is a chronic condition in which the blood's force against artery walls is excessively high, posing risks such as heart disease. The condition's underlying mechanisms involve complex interactions among the cardiovascular, kidney, and autonomic nervous systems.Renin-Angiotensin-Aldosterone System (RAAS): This system significantly influences blood pressure regulation. When blood pressure decreases, the kidneys secrete renin. This enzyme transforms angiotensinogen, a plasma protein,...
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Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

Cardiac Output I:Effect of Heart Rate on Cardiac Output

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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...
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Assessment of the Cardiovascular System I: Subjective Data01:23

Assessment of the Cardiovascular System I: Subjective Data

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A thorough health history and physical assessment are essential for identifying cardiovascular disease (CVD) symptoms and distinguishing them from other health issues.
Initial Enquiry
Ask the patient about their primary concern and thoroughly explore all reported symptoms.
Medical History
Investigate past illnesses affecting the cardiovascular system, such as angina, anemia, rheumatic fever, congenital heart disease, stroke, thrombophlebitis, dysrhythmias, varicosities
Inquire about symptoms...
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Hypertension III: Clinical Manifestations and Diagnostic Studies01:30

Hypertension III: Clinical Manifestations and Diagnostic Studies

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Hypertension is asymptomatic and also referred to as the "silent killer" until it progresses to a severe stage or causes target organ disease. Patients may experience symptoms stemming from the strain on blood vessels and tissues in various organs or the heart's increased workload.Physical exams might show no abnormalities other than high blood pressure. Signs of vascular damage, when present, correspond to the organs supplied by the affected vessels, leading to target organ damage. For...
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Related Experiment Video

Updated: Aug 7, 2025

Impact of High-intensity Interval Exercise and Moderate-Intensity Continuous Exercise on the Cardiac Troponin T Level at an Early Stage of Training
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Impact of High-intensity Interval Exercise and Moderate-Intensity Continuous Exercise on the Cardiac Troponin T Level at an Early Stage of Training

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Heart Rate from Progressive Volitional Cycling Test Is Associated with Endothelial Dysfunction Outcomes in

Cristian Alvarez1, Marcelo Tuesta1, Álvaro Reyes1

  • 1Exercise and Rehabilitation Sciences Institute, School of Physical Therapy, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago 7591538, Chile.

International Journal of Environmental Research and Public Health
|March 11, 2023
PubMed
Summary

Heart rate during a progressive cycling test is linked to vascular changes in hypertensive patients. Specifically, higher heart rates in later stages of the Astrand test correlate with reduced carotid-intima media thickness, indicating potential for exercise testing in hypertension management.

Keywords:
arterial hypertensioncarotid-intima media thicknessendothelial dysfunctionexercise testflow-mediated dilationpulse wave velocityvasculature

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Area of Science:

  • Cardiovascular Physiology
  • Exercise Science
  • Hypertension Research

Background:

  • Progressive volitional cycling tests are valuable for exercise prescription in cardiovascular and metabolic diseases.
  • Limited data exists on the relationship between exercise heart rate and endothelial dysfunction markers in hypertensive patients.

Purpose of the Study:

  • To examine the association between endothelial dysfunction markers (FMD, PWVba, cIMT) and heart rate during a cycling test in hypertensive adults.
  • To characterize cardiovascular, anthropometric, and body composition in this population.

Main Methods:

  • A descriptive clinical study involving hypertensive, elevated blood pressure, and normotensive control groups.
  • Participants underwent a progressive cycling test (Astrand test).
  • Primary outcomes included FMD, PWVba, cIMT, and heart rate at specific wattage stages; secondary outcomes included body composition and metabolic measures.

Main Results:

  • No significant association was found between FMD, PWVba, and heart rate across test stages in any group.
  • A significant association was observed between carotid-intima media thickness (cIMT) and heart rate at 75-150 watts in the hypertensive group.
  • A trend towards increasing pulse wave velocity (PWVba) was noted across all groups.

Conclusions:

  • Heart rate during a progressive cycling test is associated with endothelial dysfunction parameter cIMT in hypertensive patients.
  • The Astrand test's later stages show strong predictive capacity for vascular parameters in hypertensive individuals compared to controls.