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JAMA. 1967;199(4):261-264.

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

On June 27, 1962, the first synchronous pacer with myocardial electrodes was implanted in man.¹ This type of pacer functions by picking up the atrial signal and, after a delay roughly equivalent to a normal P-R interval, provides a stimulus to the ventricles. The concept of electronic atrioventricular sequential activation was first reported by Folkman and Watkins² and later by Stephenson et al^3-5 and Kahn et al.⁶ These early investigators successfully produced atrioventricular synchrony for short periods in dogs. Each added changes and refinements to the circuitry permitting closer simulation of the normal parameters of the heart by producing, electronically, a P-R interval and a blocking circuit for the limitation of ventricular rates in supraventricular tachycardia. Endocardial synchronous pacing was first accomplished by Battye and Weale⁷ using twin electrodes: one serving as the atrial lead, the other for ventricular stimulation. The electronics of such a . . . [Full Text PDF of this Article]

Footnotes
For a list of participants see page 264.

Reprint requests to 4300 Alton Rd, Miami Beach. Fla 33140 (Dr. Nathan).

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