When we lie on the couch watching television and my arm drapes across his chest, I sometimes notice that his heart beats in ...

A veterinary advice column reassured a dog owner that an irregular heartbeat in a relaxed dog may be a normal respiratory sinus arrhythmia, not heart disease. This breathing-linked rhythm change is ...

Heart issues often show up without anyone noticing. They mix in with normal aging or changes in routine. Small shifts in breathing, energy, or appearance can sometimes carry more meaning than they ...