The first ECG strip below shows a P wave with sinus morphology, thus normal sinus rhythm. If the P wave has a morphology different from the typical sinus morphology, it is termed ectopic ...

it will conduct back through the normal AV nodal conduction pathway since it will no longer be refractory and a reentrant circuit will be created. See the ECG strip below which shows a PVC ...

there are a variety of atypical ECG patterns, often called 'normal variants', that can occur in perfectly normal individuals. SCD is most often due to an extremely rapid and uncoordinated cardiac ...