Possible causes of heart diseases in cats

Aortic stenosis   Dissecting aneurysm in a cat - clinical case Patent ductus arteriosus  Ventricular premature beats
Atrial fibrillation Endocarditis Pericardial effusion   Ventricular septal defect  
Atrial septal defect FIP -induced pericarditis Peritoneal- pericardial diaphragmatic hernia Ventricular tachycardia
Atrial standstill Heart failure     Pulmonic stenosis   Sinus tachycardia 
Atrial tachycardia Heartworm disease Renal failure Supraventricular premature beats
Aortic thromboembolism   Hemoplasmas Second degree AV block Supraventricular tachycardia
Bacterial pericarditis Hyperthyroidism Sinus bradycardia Tetralogy of Fallot  
Cardiomyopathy - dilated  Hypertension Toxoplasma-induced pericarditis 
Cardiomyopathy - hypertrophic  Hyperthyroidism Third degree AV block
Cardiomyopathy - restricted   Mitral valve dysplasia   Tricuspid dysplasia
Chylous effusion Neoplasia - Mediastinal lymphoma Valvular endocardiosis  

1. Oxygen-poor blood (shown in blue) flows from the body into the right atrium.
2. Blood flows through the right atrium into the right ventricle.
3. The right ventricle pumps the blood to the lungs, where the blood releases waste gases and picks up oxygen.
4. The newly oxygen-rich blood (shown in red) returns to the heart and enters the left atrium.
5. Blood flows through the left atrium into the left ventricle.
6. The left ventricle pumps the oxygen-rich blood to all parts of the body.