Partial Heart Block Due to Digitalis.

Atrial tachycardia with block treated with digitalis.

ATRIAL TACHYCARDIA with atrioventricular block was first described by Sir Thomas Lewis in 1909.1 In recent years, Lown, Levine, and co-workers2-5 have emphasized the importance of digitalis intoxication as a cause of this arrhythmia. Other authors have also supported this concept.6' 7 Two large series describing the arrhythmia were published in 1943. Barker and coworkers8 found that digitalis w...

The use of digitalis in spite of the presence of ventricular tachycardia.

T HE presence of ventricular tachycardia has been regarded as one of the major contraindications to the use of digitalis.'-8 Our clinical observations, however, have led us to use digitalis somewhat more freely in cardiac disease in general than is usually recommended.9-10 The four observations on three patients presented in this paper illustrate instances of the intensive use of digitalis in t...

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...

Influence of Reserpine and £?TM 10 on Digitalis- Induced Ventricular Arrhythmia

• Roberts and co-workers have concluded that ventricular rhythmicity is related, at least in part, to the action of endogenous catecholamines on ventricular pacemakers.' It is likely, therefore, that changes in ventricular rhythm induced by cardioactive agents may be a consequence of an action involving catecholamines. Digitalis glycosides were examined to test this hypothesis. Evidence was pre...

Digitalis induced paroxysmal atrial tachycardia with AV block.