Why is my dog losing weight with a fast heart and a hissing sound?

Question

my aunt dog is loosing wright and his heart is beating fast with a hissing sound....what could it be

C. Rathjens, DVM · Accepted Answer

From this description, I'm worried about a heart murmur. An heart murmur is turbulent blood flow in the heart and if it's severe enough you can actually hear it or feel it from the outside. This can lead to congestive heart failure. I would recommend scheduling a vet appointment tomorrow morning, or going to an emergency clinic if he is breathing rapidly (more than 30 breaths a minute while resting) very lethargic, or his gums look pale. Best of luck

Why is my dog losing weight with a fast heart and a hissing sound?

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