Abstract

A case of auricular fibrillation in which the interval between QRS and the first heart sound was much longer after a short diastole is described. Two more cases were studied, in one of which the same phenomenon occurred. The length of systole changed in proportion to that of the preceding diastole in the two cases in which the interval between the electric and acoustic phenomena was variable. Measurement of the pulse wave speed by means of the heart sounds does not change the known fact that smaller waves have a slower speed in cases of auricular fibrillation.

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