B. F. Hoffman, M.D.
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Electrocardiographic records are employed to show the type of disturbance of rhythm or conduction. Such records often indicate the site of ectopic pacemakers, the site of disturbed conduction, or both. However, to obtain information on the mechanism responsible for altered rhythmicity or detailed information on the exact localization and mechanism of conduction disturbances, other techniques are necessary. Two which have been employed with some success in recent years are microelectrode studies of single cardiac fibers in isolated preparations and direct records from the specialized conducting system in intact hearts. Results obtained through use of these techniques are described in an
Hoffman BF. Disturbances of Rhythmicity and Conduction.. Ann Intern Med. 1962;56:667–668. doi: 10.7326/0003-4819-56-4-667_4
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Published: Ann Intern Med. 1962;56(4):667-668.
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