A customer contacted physio-control to report that their device was used to provide a synchronized shock to a patient during a cardioversion procedure.
After the delivery of the synchronized shock, the patient's rhythm converted from stable ventricular tachycardia to ventricular fibrillation.
The customer advised that the sense markers did not appear regularly on each qrs complex, and medical personnel were concerned that the patient had received a shock on the t-wave.
Physio-control contacted the customer in order to obtain additional information about the patient, including the patient outcome; however, no response has been received.
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