Abstract
Acute right heart failure related to pulmonary causes (acute cor pulmonale) is caused mainly by acute pulmonary embolism or acute respiratory distress syndrome (ARDS) requiring mechanical ventilatory support. The echocardiogram is even more useful than right heart catheterization in this situation, because the pulmonary arterial pressure correlates poorly with right ventricular function and cardiac output measurements are often unreliable. The echo also gives information not only on the extent of right ventricular dysfunction and dilation, but also on left ventricular filling and function. Acute cor pulmonale due to massive pulmonary embolism occurs in the majority of pulmonary embolism patients admitted to the ICU and may respond rapidly to thrombolytic therapy. Acute cor pulmonale in patients with ARDS is partly related to positive pressure ventilation and its effect on increasing the impedance of the pulmonary vasculature. Lung-protective ventilatory strategies using limited tidal volumes and plateau pressures can greatly lower the occurrence of acute cor pulmonale in ARDS patients. The therapy for acute cor pulmonale aims at minimizing the pulmonary vascular resistance and optimizing fluid volume. Vasopressor agents should be used in hypotensive patients to maintain coronary perfusion, but inhaled vasodilator agents like inhaled nitric oxide and prostacyclin are seeing increasing use in critical care settings to selectively dilate the pulmonary arterial bed.
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Vieillard-Baron, A., Jardin, F. (2008). Acute Right Ventricular Dysfunction: Focus on Acute Cor Pulmonale. In: Hill, N.S., Farber, H.W. (eds) Pulmonary Hypertension. Contemporary Cardiology™. Humana Press. https://doi.org/10.1007/978-1-60327-075-5_17
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DOI: https://doi.org/10.1007/978-1-60327-075-5_17
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