The image below shows the typical findings of a left bundle branch block in the precordial ECG leads. Note: If the QRS duration is 100 to 119 ms with criteria 2, 3 and 4 of the above, an ...

However, unlike in the presence of a left bundle branch block, myocardial ischemia and infarction can easily be detected on ECG when a RBBB is present. Below is an ECG displaying a right bundle ...

A STEMI is generally defined as an Electrocardiogram (EKG) with ST elevation of greater than 1 mm in 2 or more contiguous leads. It has also been defined as a "new" Left Bundle Branch Block (LBBB ...

The presence of high QRS voltages that fulfil voltage criteria for left or right ventricular hypertrophy in the absence of other ECG or clinical markers suggestive of pathology are considered normal ...