A. M. HARRIS, M.D.
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To the Editor: With reference to the recent letter (Ann. Intern. Med. 69: 846, 1968) by Dr. Azam Ansari on the article entitled "Auscultatory Clicks Produced by Pacemaker Catheters," I would like to point out to these authors that this subject was fully dealt with by me in an article entitled "Pacemaker Heart Sound" published in the British Heart Journal in July 1967. This sound is due to intercostal muscle contraction, and in fact it was abolished by suxamethonium chloride.
HARRIS AM. PACEMAKER CLICKS CLARIFIED. Ann Intern Med. ;70:234. doi: 10.7326/0003-4819-70-1-234_1
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Published: Ann Intern Med. 1969;70(1):234.
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