Objective: Interruption of chest compressions should be minimizedbecause of its negative effects on survival. This randomized,controlled, cross-over study aimed to analyze the effectiveness ofMacintosh, Miller, McCoy and McGrath laryngoscopes duringwith or without chest compressions in the scope of a simulatedcardiopulmonary resuscitation scenario.Methods: The time required for successful tracheal intubation,number of attempts, dental trauma severity and the need for optimizationmanoeuvres were recorded during cardiopulmonary resuscitationwith and without chest compressions. The experiencewith computer games during the last 10 years were asked to theparticipants and recorded.Results: McCoy laryngoscope yielded the shortest time for successfultracheal intubation both in the presence of and withoutchest compressions. During the use of McCoy laryngoscopes, fewertracheal intubation attempts, lower incidence of dental traumaand lower visual analogue scale scores on the ease of intubationwere recorded. Participants who are experienced computer gameplayers using Macintosh, McCoy and McGrath achieved successfultracheal intubation in a significantly shorter time during resuscitationwithout chest compressions. Dental trauma incidenceand number of tracheal intubation attempts did not show anysignificant difference between the four laryngoscopes being relatedto the rate of playing computer games.Conclusion: McGrath video laryngoscopes do not appear to haveadvantages over direct laryngoscopes for securing a smooth andsuccessful tracheal intubation during rhythmic chest compressions.We believe that as McCoy laryngoscope provided trachealintubation in a shorter time and with fewer attempts, this laryngoscopemay increase the success rate of resuscitation.