Bradycardia

Sinus bradycardia occurs on an ECG when there is a normal upright P wave in lead II ― sinus P wave ― preceding every QRS complex with a ventricular rate of less than 60 beats per minute.

A bifascicular block on ECG is defined by the combination of a right bundle branch block and either a left anterior fascicular block or left posterior fascicular block.

Sick sinus syndrome (SSS) occurs from sinoatrial node dysfunction and may manifest in multiple different ways.

Beta blocker overdose can be life threatening. The three main features include bradycardia, hypotension and hypoglycemia.

The Bezold-Jarisch Reflex can occur after coronary reperfusion.