Bundle branch blocks are abnormalities of the heart’s conduction system that show up an electrocardiogram (ECG), which is a tracing of the electrical activity in the heart.

E There is a complete right bundle branch block Question 3. You are reviewing a patient with suspected heart failure. There is no cardiac history but the patient does have a longstanding history of ...

Sinus arrhythmia requires some background information on the heartbeat rhythm. The heartbeat is regulated by a natural pacemaker known as the Sinoatrial (SA) node, situated in the right atrium.