Epidemiology
Etiology
- Idiopathic Degenerative Fibrosis (commonest).
- Ischaemia.
- Cardiomyopathies.
- Infiltrative Diseases e.g. sarcoidosis, haemochromatosis.
- Congenital abnormalities.
Pathophysiology
Clinical features
Diagnostics
Typical ECG findings include bradycardia, sinus pauses (delayed P waves), and sinus arrest (prolonged delay of a P wave such that the P wave is dropped).