DIGITALIS HEART BLOCK.

Partial Heart Block Due to Digitalis.

Amongst a series of cases of partial heart block, collected over a period of years, there were some in which treatment with digitalis was mainly or partly responsible. This group involves some special problems that seem worth separate consideration. The slow pulse, even as slow as 35 in a minute, after the administration of digitalis was one of the original observations of Withering (1785). Muc...

Digitalis in experimental, surgically induced heart block.

Digitalis and intractable heart failure.

Digitalis and atrial tachycardia with block.

Atrial tachycardia with block is usually considered to be caused by digitalis intoxication. We have reviewed 44 episodes in 3I patients seen during the past three years. None of the patients fulfilled Lown's criteria for considering digitalis to be the common aetiological factor in atrial tachycardia with block. In our patients the concentration of serum digitoxin was between i5 and 25 nglml in...

Hyperkalemia-induced complete heart block

Background: Potassium, as an extracellular ion, plays an important role in the electrophysiologic function of the myocardium and any change in extracellular concentration of this ion might have a marked impression upon myocyte electrophysiologic gain. High serum potassium levels are thought to impair pulse conduction in Purkinje fibers and ventricles more than that in the Atrio...