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Inspiratory impairment in right ventricular performance during acute asthma
F Jardin1, O Dubourg, A Margairaz
1Respiratory Intensive Care Unit, Ambroise Paré Hospital, Boulogne, France.
Chest
|November 1, 1987
Summary
Asthmatic patients experience reduced right ventricular function during acute attacks. Deep inspiration impairs right ventricular ejection due to negative intrathoracic pressure, affecting cardiac output.
Area of Science:
- Cardiology
- Pulmonary Medicine
- Medical Imaging
Background:
- Asthma exacerbations can impact cardiovascular function.
- Right ventricular (RV) performance is crucial for overall hemodynamics.
Purpose of the Study:
- To investigate RV function in asthmatic patients during acute attacks.
- To correlate hemodynamic and echocardiographic parameters with respiratory phases.
Main Methods:
- Simultaneous bedside right heart catheterization and two-dimensional echocardiography (2DE) were performed.
- Data acquisition occurred across four respiratory cycle phases: inspiration, early, mid, and late expiration.
- Seven asthmatic patients during acute attacks were studied.
Main Results:
- Inspiration led to significant increases in RV end-systolic and end-diastolic areas.
- Inspiratory period showed reduced RV stroke area and pulmonary artery pulse pressure.
- A decrease in RV developed pressure and fractional area contraction occurred during inspiration.
Conclusions:
- Deep inspiratory efforts in asthma transiently depress RV function.
- Negative intrathoracic pressure during inspiration likely impairs RV systolic motion and ejection.
- This RV dysfunction may contribute to altered hemodynamics during asthma attacks.