Echocardiography involves examining your dog or cats heart with ultrasound. Most pets will allow this to be completed unsedated, although occasionally it is necessary to sedate them. The patient will lie on a comfortable padded tablet with a small hole cut out of it, allowing the heart to flop down between lung lobes and be examined from underneath. It is an invaluable procedure where your vet suspects heart disease, and will often be done alongside x rays and blood samples. Small patches of fur will need to be clipped to allow the examianation to be completed.