Video Experimental Relacionado

Updated: Aug 1, 2026

Breathing-controlled Electrical Stimulation (BreEStim) for Management of Neuropathic Pain and Spasticity
11:34

Breathing-controlled Electrical Stimulation (BreEStim) for Management of Neuropathic Pain and Spasticity

Published on: January 10, 2013

Eficacia del propranolol en el control de la actividad ectópica ventricular inducida por el ejercicio o aumentada

J V Nixon, W Pennington, W Ritter

    Circulation
    |January 1, 1978
    PubMed
    Resumen

    El propranolol redujo efectivamente la ectopia ventricular inducida por el ejercicio en la mayoría de los pacientes, incluidos aquellos con enfermedad arterial coronaria. Las diferentes vías de administración mostraron una eficacia similar, y los niveles plasmáticos no se correlacionaron con los resultados.

    Más Videos Relacionados

    Bladder Smooth Muscle Strip Contractility as a Method to Evaluate Lower Urinary Tract Pharmacology10:26

    Bladder Smooth Muscle Strip Contractility as a Method to Evaluate Lower Urinary Tract Pharmacology

    Published on: August 18, 2014

    In Vivo Luminal Measurement of Distension-Evoked Urothelial ATP Release in Rodents09:17

    In Vivo Luminal Measurement of Distension-Evoked Urothelial ATP Release in Rodents

    Published on: September 7, 2022

    Videos de Conceptos Relacionados

    Physiological Control of Respiration01:23

    Physiological Control of Respiration

    Introduction
    Breathing, a seemingly passive process, is regulated by the respiratory center in the brainstem. This center coordinates the involuntary control of respirations, which means it occurs without conscious effort, ensuring a smooth and uninterrupted pattern.
    Regulation of Ventilation
    The body maintains ventilation by monitoring levels of carbon dioxide (CO2), oxygen (O2), and hydrogen ion concentration (pH) in the arterial blood. Among these factors, the level of CO2 plays a crucial...
    Mechanism of Breathing III: The Accessory Muscles01:21

    Mechanism of Breathing III: The Accessory Muscles

    The Role of Accessory Muscles in the Respiratory System
    The respiratory system is a complex network that relies on primary respiratory muscles like the diaphragm, but also involves accessory muscles to enhance lung expansion and airflow during both inhalation and exhalation.
    Enhancing Inhalation with Accessory Muscles:
    Accessory muscles such as the sternocleidomastoid, scalene, intercostal, and abdominal muscles are crucial when additional respiratory effort is required, such as during deep...
    Direct-Acting Cholinergic Agonists: Pharmacological Actions00:59

    Direct-Acting Cholinergic Agonists: Pharmacological Actions

    Direct-acting cholinergic agonists exert their pharmacological actions by mimicking the effects of acetylcholine on postsynaptic muscarinic receptors to generate parasympathetic responses. These agents elicit a range of physiological responses, including cardiovascular effects. For example, activation of muscarinic receptors induces bradycardia, decreased cardiac output, reduced peripheral resistance, and consequent hypotension. In the eye, stimulation of M3 receptors leads to smooth muscle...
    Pulmonary Ventilation: Inhalation01:24

    Pulmonary Ventilation: Inhalation

    Pulmonary ventilation is a vital process that ensures the exchange of oxygen and carbon dioxide in the lungs. It refers to the movement of air into and out of the lungs, enabling the body to obtain oxygen and remove waste carbon dioxide. In this article, we will explore the intricacies of pulmonary ventilation, including its underlying principles, mechanisms, and the interplay of pressures within the respiratory system.
    Boyle's law becomes particularly pertinent when examining respiratory...
    Pulmonary Cycle: Exhalation01:17

    Pulmonary Cycle: Exhalation

    In terms of human respiration, the act of expelling air, known as exhalation (or expiration), operates on the principle of pressure gradients. During expiration, the pressure within the lungs exceeds that of the surrounding atmosphere. Under normal conditions, quiet breathing involves passive exhalation and is free of muscular contractions. This is because the exhalation process is driven by the natural elastic recoil of the lungs and chest wall, both of which have an inherent tendency to...
    Other Factors Affecting Respiration Centers01:17

    Other Factors Affecting Respiration Centers

    Breathing is primarily an involuntary activity regulated by the brainstem respiratory centers. However, it can also be consciously controlled, allowing us to hold our breath or take deeper breaths when needed. This voluntary control is facilitated by the cerebral motor cortex, which bypasses the medullary centers to stimulate the respiratory muscles directly.
    However, the ability to hold one's breath voluntarily is not limitless. When the CO2 concentration in the blood reaches a critical level,...