In extreme cases tapping the pericardium with a trocar and cannula to draw off the fluid is resorted to, but the operation requires exact anatomical knowledge.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
After the attack has abated mustard mixed with water may be rubbed well over the left side of the chest to stimulate the absorption of the fluid within the pericardium.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
In most cases the foreign body does not penetrate to the heart, nor even to the pericardium.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler