Sinus Bradycardias

• Characterised as a normal sinus rhythm with an abnormally slow heart rate

• Caused by: pathologic conditions, drug reactions, physiologic conditions: athletic animals, calm animals, sleeping animals

Treatment: Usually unnecessary unless clinical signs due to reduced cardiac output remain

• Treat the underlying condition

• Drugs used to treat sinus bradycardias: atropine, isoprenaline, glycopyrrolate