Acute shock in severe dengue haemorrhagic fever (DHF) may occur concurrently with accumulation of fluid in serous body spaces such as pleural, peritoneal and pericardia/ cavities. Echocardiography is a non-invasive diagnostic procedure which is sensitive to detect even a small quantity of pericardia/ effusion. The chest radiogram in two reported cases of DHF associated with severe shock revealed that almost half of the pleural cavity was filled with fluid. Although no signs of pericardia/ effusion could be determined on physical examination, ECG and radiological procedures, a small amount of fluid was clearly seen on echocardiogram.
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