In total, 8465 adult patients undergoing cardiac operations on cardiopulmonary bypass (CPB) and with cold antegrade crystalloid
cardioplegic arrest were consecutively enrolled in a database. Patients with VF after removal of the aortic clamp were given
20 mmol potassium, and if needed an extra 10 mmol, in the perfusion line and the conversion rate was registered. Preoperative and
intraoperative factors possibly related to the occurrence of post-ischaemic VF were assessed.