It was reported the recording system froze and was the only device in use to monitor heart rhythm.A lab system pro ep recording system and a cryoablation catheter were selected for use during a para-hisian kent ablation procedure.Ablation progress was being monitored by reading endocardial signals.The lab system pro was the only device in use to monitor heart rhythm.The physician was ablating when the screen froze; the screen was no longer transmitting information in real time.During this time, the physician was unable to see changes in rhythm.No error messages popped up.The freeze lasted 10 seconds.The freeze was resolved by pressing the f8 button several times to create a new event.When the signals finally updated, the physician saw atrioventricular (av) block; therefore, he stopped ablating and the av block disappeared.It was unknown how long the av block lasted, as it began when the screen was frozen.The av block was transient and did not require intervention.
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