Related Experiment Videos
[Analysis of the hemodynamics in patients with artificial mitral valve insufficiency]
Insights
Artificial mitral incompetence can severely reduce cardiac output, leading to rapid left ventricular exhaustion. This study quantifies regurgitation to assess the severity of this hemodynamic disorder.
Area of Science:
- Cardiovascular Medicine
- Medical Imaging
- Hemodynamics
Context:
- Hemodynamic disorders in patients with artificial mitral incompetence.
- Utilized catheterization and cine-angiocardiography findings for analysis.
- Focused on 12 patients with this specific condition.
Purpose:
- To analyze hemodynamic disorders associated with artificial mitral incompetence.
- To develop and apply a method for estimating regurgitant volume.
- To determine the degree of artificial incompetence based on relative regurgitation.
Summary:
- A novel method using single-plane ventriculograms accurately estimates regurgitant volume into the left atrium.
- Relative regurgitation is calculated by dividing regurgitant flow by total ventricular ejection volume.
- Artificial mitral incompetence severity correlates with reduced effective cardiac output (33-50% of normal).
Impact:
- Highlights the "malignancy" of artificial mitral incompetence due to significant cardiac output reduction.
- Demonstrates rapid exhaustion of the left ventricular myocardium as a consequence.
- Provides a quantitative method for assessing the severity of this condition.
Abstract:
Hemodynamic disorders which developed in 12 patients with artificial mitral incompetence were studied. A method developed in the clinic of analysing the findings of catheterization and cine-angiocardiography was used. The method of analysis of single-plane ventriculograms makes it possible to estimate the volume of blood regurgitated into the left atrium to an accuracy of several millilitres. The degree of artificial incompetence is determined from the relative regurgitation which is estimated by dividing the volume of returned blood flow by the total volume of ventricular ejection. It is concluded that the "malignancy" of the course of artificial incompetence is determined by a sharp reduction of the effective cardiac output (to 33--50% of the normal volume) against the background of rapid rapid exhaustion of the left ventricular myocardum.