Heart block (HB) is a recognised complication of acute myocardial infarction (AMI) and is often a marker for increased mortality and morbidity. An appreciation of the anatomical and physiological mechanisms associated with the development of HB in AMI is important for the prediction and management of complications when dealing with such cases. Certain forms of HB are classically linked to infarction of specific anatomical territories in AMI. However, variations in pre-morbid state and anatomy of the coronary vessels provide potential for the development of HB in any patient experiencing AMI, regardless of the territory affected.
Tim Edwards - Senior Lecturer, Paramedic Science, University of Hertfordshire; Paramedic, London Ambulance Service