Related Experiment Video
Updated: Aug 15, 2026

Measuring Cardiac Autonomic Nervous System (ANS) Activity in Children
Published on: April 29, 2013
[Comparative study of the vegetative reactivity of the cardiovascular system in carotid-sinus and exercise tests]
Abstract:
The sinocarotid test test was used to study the vegetative supply and reactivity in 111 practically normal subjects aged 20 to 29 years. The vegetative supply was also examined with the aid of the standard equally graded submaximal exercise test. As regards the evaluation of the vegetative equilibrium in the cardiovascular system, the most informative was the time-course of Kerdo's index as compared with the time-course of the increments of the blood minute volume (BMV) under exercise. Dissociation of the time-course of the vegetative index exercise. Dissociation of the time-course of the vegetative index and BMV suggests the presence of disorders in the vegetative nervous system. Inadequate reaction to the standard exercise is observed in subjects with excess parasympathetic or sympathetic effects before exercise.
Related Concept Videos
Exercise and Cardiovascular Response
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 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...
Assessment of the Cardiovascular System III: Palpation
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above the...
Exercise Stress Test
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

