The characteristic patterns of the multiple Premature Beats that are interupted by normal cycles are: Bigeminy — where every other beat is a PB Trigeminy — where every third beat is a PB and Quadrigeminy — where every fourth beat is a PB Depending on to which level belongs the focus that starts to generate impulses we distinguish Atrial, Junctional and Ventricular Multiple Premature Beats. #doctor #nurse #medicine #medico #medical #medicalstudent #medschool #usmle #nclex #medicina