A patient, aged 65 years, was admitted to the hospital after several days of emesis. Shortly after admission, the patient developed an acutearrhythmia which resolved after three rounds of CPR and one shock.
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This is ventricular fibrillation, determined by the absence of identifiable P-waves, QRS complexes, or T-waves, and the irregular deflections of varying amplitude.
To see more cases like this, visit Figure 1.