A 67 year old male suffers a large myocardial infarction complicated by sustained ventricular tachycardia. He is started on a lidocaine infusion. He subsequently develops shock liver from hypotension during the ventricular tachycardia and his serum lidocaine levels become significantly elevated. Which of the following is a manifestation of lidocaine toxicity?
C. Renal failure
D. Congestive heart failure