AZAM ANSARI, M.D.
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To the Editor: In their paper "Auscultatory Clicks Produced by Pacemaker Catheters" (Ann. Intern. Med. 68: 1320, 1968), Murdock, Meyers, and Bacos attempted to prove that these clicks were produced by the contractions of the intercostal muscles. Despite failing to record these clicks by electromyography, they stated that this was the most plausible mechanism.
A simple, convincing, and successful method would have been to use a neuromusclar blocking agent like suxamethonium chloride. In my opinion, clicks produced by muscular contractions can be effectively abolished by this method.
ANSARI A. PACEMAKER CLICKS. Ann Intern Med. ;69:846. doi: 10.7326/0003-4819-69-4-846
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Published: Ann Intern Med. 1968;69(4):846.
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