Pericarditis

Pericarditis: An inflammation of the membrane covering the heart.
Peritonitis: An inflammation of the membrane covering the abdominal cavity. Also referred to as periodontal disease.

Heart Sac Inflammation (Pericarditis) in Cats
Heart Tumors in Cats
Heart Valve Infection (Infective Endocarditis) in Cats ...

See also: Mange, Cancer, Virus, Uterus, Asthma