These have included premature ventricular depolarizations (50%), AV nodal arrhythmias (50%), AV conduction disturbances (36%), wide complex tachycardia (less than 1%), paroxysmal atrial tachycardia with AV block , complete heart block , PR prolongation, and ST segment changes. REFERENCE + Letter: "Digitalis cachexia". Banks T, Ali N N Engl J Med 1974;290:746-7.