Related Experiment Videos
Diastolic filling properties in different forms of left ventricular hypertrophy, assessed by 2-D echocardiography
K Ruffmann1, H Kücherer, A Mandelbaum
1Department of Internal Medicine (Cardiology) Heidelberg University, F.R.G.
Insights
Left ventricular diastolic function is impaired by increased mass relative to volume, not systolic dysfunction. Hypertrophic cardiomyopathy shows varied diastolic function due to additional factors.
Area of Science:
- Cardiology
- Echocardiography
- Physiology
Background:
- Left ventricular hypertrophy (LVH) can affect cardiac function.
- Different types of LVH may influence diastolic filling patterns uniquely.
- Understanding these patterns is crucial for managing heart conditions.
Purpose of the Study:
- To investigate how different types of left ventricular hypertrophy impact left ventricular filling patterns.
- To determine the relationship between left ventricular mass/volume ratio and diastolic function.
- To explore factors influencing diastolic function in hypertrophic cardiomyopathy.
Main Methods:
- Studied 20 patients with various LVH conditions (dilated cardiomyopathy, hypertension, end-stage renal disease, hypertrophic cardiomyopathy) and 5 controls.
- Utilized M-mode and pulsed 2D-Doppler echocardiography.
- Calculated left ventricular dimensions, volumes, mass, and diastolic filling parameters from mitral inflow Doppler measurements.
Main Results:
- Left ventricular diastolic function impairment correlated significantly with increased left ventricular mass/volume ratio.
- No significant relation was found between diastolic function and impaired left ventricular systolic function.
- Diastolic function parameters in hypertrophic cardiomyopathy patients were highly variable, suggesting other influencing factors.
Conclusions:
- The ratio of left ventricular mass to volume is a key determinant of diastolic dysfunction in LVH.
- Systolic function impairment does not directly predict diastolic dysfunction.
- Hypertrophic cardiomyopathy's diastolic dysfunction is complex and influenced by factors beyond mass/volume ratio.
Abstract:
In order to study the influence of various kinds of left ventricular hypertrophy on left ventricular filling pattern, 20 patients (five dilated cardiomyopathy, five hypertension, five end-stage renal disease, five hypertrophic cardiomyopathy), and five normals were studied by M-mode and pulsed 2D-Doppler echocardiography. Left ventricular dimensions, volumes and mass were derived from standard M-mode echocardiograms. Doppler velocity measurements of mitral inflow provided calculation of left ventricular diastolic filling parameters. While left ventricular diastolic function bore no relation to the impairment of left ventricular systolic function, there was a statistically significant correlation of left ventricular mass/volume ratio and impairment of left ventricular diastolic function. In patients with hypertrophic cardiomyopathy, the parameters varied widely, and additional factors seem to determine left ventricular diastolic function in this group.