関連する実験動画

Updated: Jul 8, 2026

Cardiac Catheterization in Mice to Measure the Pressure Volume Relationship: Investigating the Bowditch Effect
07:38

Cardiac Catheterization in Mice to Measure the Pressure Volume Relationship: Investigating the Bowditch Effect

Published on: June 14, 2015

人における右心室血動力学が,左心室の透析圧-体積関係に及ぼす影響

P A Ludbrook, J D Byrne, R C McKnight

    Circulation
    |January 1, 1979
    PubMed
    まとめ

    ニトログリセリンは,左心室の充填圧と全身阻害を効果的に軽減し,心臓の機能を改善します. アミルニトリートは動脈圧を下げるが,静脈圧と体積の関係を大きく変えない.

    さらに関連する動画

    Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction09:20

    Lumped-Parameter and Finite Element Modeling of Heart Failure with Preserved Ejection Fraction

    Published on: February 13, 2021

    Cardiac Loading using Passive Left Atrial Pressurization and Passive Afterload for Graft Assessment08:49

    Cardiac Loading using Passive Left Atrial Pressurization and Passive Afterload for Graft Assessment

    Published on: August 2, 2024

    関連する概念動画

    Regulation of Stroke Volume01:27

    Regulation of Stroke Volume

    The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
    Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
    Imbalances in Cardiac Output01:26

    Imbalances in Cardiac Output

    The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
    CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
    Pressure Relationships in Thoracic Cavity01:24

    Pressure Relationships in Thoracic Cavity

    Breathing, otherwise known as pulmonary ventilation, is the process of air movement into and out of the lungs. The main mechanisms propelling pulmonary ventilation are atmospheric pressure (Patm), intra-pulmonary (Ppul ) or intra-alveolar pressure (Palv) within the alveoli, and intrapleural pressure (Pip) within the pleural cavity.
    Breathing Mechanisms
    Both intra-alveolar and intrapleural pressures rely on specific lung properties. The ability to breathe—allowing air to enter the lungs during...
    Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

    Cardiac Output II: Effect of Stroke Volume on Cardiac Output

    Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
    Preload
    Preload refers to the initial elongation of the cardiac myocytes before contraction and is related to the volume of blood filling the heart at the end of diastole, or end-diastolic volume. The...
    Mitral Regurgitation I: Introduction01:20

    Mitral Regurgitation I: Introduction

    Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
    Mitral Stenosis I: Introduction01:22

    Mitral Stenosis I: Introduction

    Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...