This text is missing some spaces, please add them: Dogswillusuallyprogresstoahemorrhagicpericarditis(bloodintheheartsac),whichcanleadtoalife-threateningbuildupoffluidintheheartsac,andtamponade(compressionoftheheartbythefluidintheheartsac).
Dogs will usually progress to a hemorrhagic pericarditis (blood in the heart sac), which can lead to a life-threatening buildup of fluid in the heart sac, and tamponade (compression of the heart by the fluid in the heart sac).