The rhythmic, regular beating of the heart is controlled by a natural pacemaker--a small patch of cells at the top of the right atrium called the sinus node which sends rhythmic electric impulses along specific conducting fibers to the heart muscles,...

1911-1999 American Cardiologist Paul M. Zoll introduced the first cardiac pacemaker in 1952. He was also a pioneer in the use of heart monitors, which he introduced in 1955, and of external countershock defibrillators, which he first used in 1956. Zoll...

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A pacemaker (or artificial pacemaker, so as not to be confused with the heart's natural pacemaker) is a medical device which uses electrical impulses, delivered by electrodes contacting the heart muscles, to regulate the beating of the heart. The...

The computer-assisted reading of the electrocardiogram (ECG) in Figure 1 tells the truth, but not the whole truth. Crucial data are omitted: the atria are fibrillating and the firing of the ventricular pacemaker is not only rapid, but irregular. [FIGURE 1 OMITTED]...

VERA LAWLOR, STAFF WRITER The Record (Bergen County, NJ) 08-29-2003 The pacemaker -- At Goshen Historic Track, harness racing has been the champion since 1838 By VERA LAWLOR, STAFF WRITER Date: 08-29-2003, Friday Section: GO! Edtion: All Editions.=.Two Star B. Two Star...