As the inventor of pacing technology, Dr. Paul Zoll, a founder of ZOLL Medical Corporation, performed the first human clinical cardiac pacing procedure in 1952. Today, the company named for him leads the way with patented external pacing technology.

Why Pacing Matters

For some well-conditioned athletes, a slow heart rate is normal, but for many people, it can be a serious problem if the heart cannot pump enough oxygen-rich blood to the body. In symptomatic patients whose bradycardia does not respond to drugs, pacing is an integral step in the 2015 American Heart Association ACLS bradycardia algorithm.1 Pacing is also used to treat complete heart block.

How ZOLL Pacing Works

Pacing technology design can greatly impact capture rates and patient survival. The ideal pacer current is the lowest value that maintains capture—usually about 10% above threshold. Typical threshold currents range from 40 to 80 milliamps. ZOLL® defibrillators provide twice the capture at half the current, using a 40-millisecond pulse with constant current. This overcomes disadvantages inherent in other external pacemakers, and results in less patient discomfort.

ZOLL also incorporates a unique technology in its R Series® monitor/defibrillator. Pressing and holding the 4:1 button temporarily withholds pacing stimuli, allowing you to observe the patient’s underlying ECG rhythm and morphology without losing capture. When depressed, this button causes pacing stimuli to be delivered at one-fourth of the indicated pulse-per-minute (ppm) setting.

Pacing waveform comparison

ZOLL’s pacing waveform compared to competitors’.


Electrodes Matter

Proper pacing requires a reliable, high-quality surface ECG signal. ZOLL helps ensure proper pacing with OneStep Pacing electrodes and OneStep™ Complete electrodes. Both electrode types eliminate the need for a separate ECG cable by incorporating ECG electrodes into the anterior electrode.