The greatest indication for Digitalis is in failure of compensation, cardiac muscular failure and when atrial fibrillation has set in, especially when it comes after rheumatic fever. There is arrhythmia of several kinds: irregular and unequal pulse;
‘Distension of the arteries, sometimes more and sometimes less’; extrasystoles, in irregular distribution or after every normal beat of the heart; intermissions of irregular kind and length of time; ‘the slow and small pulse frequently intermits for a shorter or longer time’.
An interesting symptom is a feeling as though the heart had stood still, with great anxiety and a feeling of a need to hold the breath. This usually follows after careless, violent motion, especially moving the arms upward. If a patient expresses a feeling that his heart will stand still as soon as he moves even slightly, and when this still occurs even if he holds his breath in an attempt to prevent it, then this is a strong indication for Digitalis. (Gelsemium, on the contrary, has a feeling that his heart will stand still as soon as he stops moving.)
Baehr describes such an attack, which often very much resembles angina pectoris: ‘The patient feels his heart stand still for a moment, with inexpressible anxiety and sudden fainting; this is followed by some violent and quick beats. One patient described them like this: as though the heart had torn itself loose, and were freely swaying to and fro like a pendulum, hanging from a thin thread’.
Digitalis will be also indicated when the liver is affected, again either from an acute or a chronic condition; for example jaundice with induration or hypertrophy of the liver, if the heart is also involved with bradycardia, or jaundice complicated with any heart dysfunction. Typically the patient has to walk about in agony, with precordial anxiety, and with urging to urinate. He has a bluish appearance of the face.