When the duration is between 0.10 and 0.12 seconds, it is intermediate or slightly prolonged. A QRS duration of greater than 0.12 seconds is considered abnormal. The QRS duration will lengthen ...

demonstrated that baseline QRS duration was not predictive for clinical ... If interatrial asynchrony is prolonged with a short PQ time, there will be a coincidence of delayed left atrial ...

However, this was largely not reiterated in the case report literature where 11 cases of PR interval prolongation ... Studies investigating QRS-complex abnormalities in association with cocaine ...