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RALPH B. BERNSTEIN, MD; ROBERT M. STANZLER, MD

Arch Intern Med. 1966;118(2):154-157.

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

THE IMPORTANCE of paroxysmal atrial tachycardia with latent block in the early diagnosis of digitalis toxicity has not been sufficiently emphasized. The arrhythmia is identified by an alteration in P-wave contour and increase in rate, but differs from paroxysmal atrial tachycardia with overt block in that the P-R interval is normal and atrioventricular (AV) block is induced only by carotid sinus pressure. This arrhythmia was originally described by Lown and Levine.^{1,p 87} Two cases illustrating this problem are presented below.

Report of Cases

CASE 1.

—A 47-year-old white man was admitted to the Boston City Hospital on Dec 7, 1964, with abdominal pain. One year previously, a pelvic exenteration with sigmoid colostomy and ileal loop bladder had been done for carcinoma of the rectum. There was no previous history of cardiac illness.

Physical examination revealed signs of peritonitis and intestinal obstruction. The electrocardiogram was within normal limits aside from . . . [Full Text PDF of this Article]

Author Affiliations
BOSTON

From the I and III (Tufts) Medical Services, and the Tufts Circulation Laboratory, Boston City Hospital. Dr. Stanzler is a fellow of the National Heart Institute.

Footnotes
Received for publication Feb 15, 1966; accepted May 27.

Reprint requests to 818 Harrison Ave, Boston 02118 (Dr. Bernstein).

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