Related Experiment Video
Updated: Sep 27, 2026

Closed Chest Biventricular Pressure-Volume Loop Recordings with Admittance Catheters in a Porcine Model
Published on: May 18, 2021
[Specific features of intracardiac relationships according to echocardiographic data in patients with obstructive or
Aim:
To examine relationships between the areas portions and hemodynamic parameters according to echocardiographic data in patients with various lung diseases accompanied by obstructive and restrictive ventilation disorders.
Materials And Methods:
154 patients aged 15 to 67 years who had various lung diseases were examined. Expiratory respiratory function and echocardiography were performed in all the patients.
Results:
Despite the type of ventilation disorders, all cardiac areas are closely interrelated. The specific features of these relationships depending on the type and severity of ventilation disorders are revealed. Thus, the correlations of the right ventricle with other cardiac areas in the obstructive type increase with the greater severity of bronchial obstruction and they are determined by the diastolic size (volume) of this ventricle.
Conclusion:
The findings suggest that there are two types of compensatory reactions of the heart in lung diseases with obstructive and restrictive ventilation disorders.
Related Concept Videos
Assessment of Ventilation II: Respiratory Depth and Rhythm
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
Cardiomyopathy IV: Restrictive Cardiomyopathy
Factors Affecting Pulmonary Ventilation
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
Mechanical Ventilation II: Invasive Ventilation
Negative-Pressure Ventilators
Negative-pressure ventilators create a vacuum around the chest or body to draw air into the lungs, simulating breathing. This method does not require an...
Assessment of Ventilation I: Respiratory Rate
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:
Physical Assessment of the Respiratory Tract II: Inspection
Chest Configuration
The chest configuration can...