. Materia medica : pharmacology, therapeutics and prescription writing for students and practitioners. Fig. 10.—From same case as Fig. fourth beat is premature. Topline jugular; middle, apex; lower, radial. i6o PHARMACOLOGY AND THERAPEUTICS tions occur at the rate of several hundred per minute, and theireffect upon the ventricle is to make it beat in a rapid, irregular,and disorderly manner. In a pulse-tracing of this conditionunmodified by drugs—(a) No two sections are alike, the radialpulse being irregular and disorderly; (b) the height of the pulsewave has no definite relation to th
. Materia medica : pharmacology, therapeutics and prescription writing for students and practitioners. Fig. 10.—From same case as Fig. fourth beat is premature. Topline jugular; middle, apex; lower, radial. i6o PHARMACOLOGY AND THERAPEUTICS tions occur at the rate of several hundred per minute, and theireffect upon the ventricle is to make it beat in a rapid, irregular,and disorderly manner. In a pulse-tracing of this conditionunmodified by drugs—(a) No two sections are alike, the radialpulse being irregular and disorderly; (b) the height of the pulsewave has no definite relation to the length of the preceding pause;. Fig. ii. Fif r>K. * ,• VA k AAMfMAHA* T&rcuta^ Khf Gf*l3//i, Rite, loo Fig. 13.—Auricular fibrillation and complete heart-block developing in a caseof cirrhosis of liver, with weak heart, but with normal rhythm. Digipuratum,\]/2 grains three times a day, was given from April 17th to 20th, whentracing showed auricular fibrillation and complete heart-block, rate 42. Thedrug was stopped, and two days later tracing 12 showed auricular fibrillationalone, rate about 135. Tracing 13 taken the next day showed return to normalrhythm, rate 100. Similar phenomena followed the administration of digitalisa month Inter. and (c) the jugular tracing shows absence of the normal auricularwaves, and in most instances numerous small fibrillation waves. Auricular fibrillation may exist without serious symptoms,but it is usually serious, is one of the most frequent causes oflack of compensation, and may be the precursor of ventricularfibrillation and death. DIGITALIS l6l (c) In paroxysmal tachyc
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