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[Ventricular interdependence reflected in interventricular septal motion: with special reference to right ventricular
Journal of Cardiography. Supplement
|January 1, 1984
Summary
Right ventricular pressure overload alters interventricular septum dynamics, causing leftward septal bowing in early diastole. This deformity correlates with the bi-ventricular systolic pressure ratio in patients with conditions like atrial septal defect.
Area of Science:
- Cardiology
- Physiology
Context:
- The interventricular septum's dynamic behavior is crucial for cardiac function.
- Right ventricular (RV) pressure overload can significantly impact septal motion and ventricular interaction.
Purpose:
- To investigate the influence of RV pressure overload on the dynamic features of the interventricular septum using two-dimensional echocardiography.
- To quantify septal motion and LV configuration using a deformity index.
Summary:
- Echocardiography was used to study 52 patients with conditions causing RV pressure overload, including atrial septal defect (ASD) and pulmonary hypertension (PH).
- A deformity index quantified left ventricular (LV) shape distortion, revealing distinct septal motion patterns in ASD with and without PH.
- In RV pressure overload, the septum became convex to the LV in early diastole due to transient RV pressure exceeding LV pressure, correlating with the bi-ventricular systolic pressure ratio.
Impact:
- Provides insights into the mechanical consequences of RV pressure overload on ventricular interdependence.
- Highlights the utility of echocardiography in assessing subtle septal dynamic changes.
- Establishes a correlation between RV pressure overload severity and specific echocardiographic findings of septal deformation.