Sudden cardiac death (SCD) is defined as any death from a cardiac cause occurring within an hour of symptom onset. The term sudden cardiac arrest (SCA) refers to an event from which an individual is resuscitated or spontaneously recovers. Sudden…
Ventricular arrhythmias originate from the distal conduction system (distal to the His bundle) or ventricular myocardium, and with few exceptions, present with a wide QRS morphology on ECG. These may occur as isolated premature ventricular contractions (PVCs), couplets (2 consecutive…
It is now >100 years since the Dutch physiologist Willem Einthoven recorded the first ECG in humans. Although the number of recording leads has increased from 3 leads to at least 12 leads, and the recording instruments have evolved into…