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SIMULATING INTERPOLATED EXTRASYSTOLES OF SUPRAVENTRICULAR ORIGIN

WILLIAM D. REID, M.D.

Arch Intern Med. 1927;39(4):596-600.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

An electrocardiogram (fig. 1) was recently obtained, which on first examination appeared to contain interpolated extrasystoles of supraventricular origin. Since such an occurrence, as far as I am aware, has not been demonstrated and furthermore is theoretically impossible, the tracing has been examined more carefully, and a different interpretation has been made.

In an article on interpolated extrasystoles, Myers and White¹ state:

An interpolated beat is a premature contraction of the ventricles which is not followed by a compensatory pause and does not disturb the dominant rhythm of the heart. It is impossible for auricular beats to be interpolated, because auricular premature beats are bound to disturb the dominant rhythm.

One must take exception to the latter phrase, for occasionally one finds auricular premature beats followed by a full compensatory pause.² In these instances the auricular premature beat must be so late, and the point from which it rises so . . . [Full Text PDF of this Article]

Author Affiliations
BOSTON

From the Evans Memorial.

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