Total ambulatory ECG system

nel fixed memory mode (precordial or armpit electrodes) or as a memory loop device (1 or 2 channels). All memories are 70 seconds and feature adjustable partitions for loop mode use. Other characteristics include 0.05 Hz frequency response, 150- to 300hour loop battery running time, pacemaker compatibility, 90-second timed live transmissions, automatic delayed memory erase circuits, silent or sound record mode options, and calibration and event markers to permit multichannel playback alignment. SURVIVAL TECHNOLOGY, INC., BETHESDA, MD Circle 290 on Reader Service Card

using HP’s custom ambulatory ECG software and the results are printed on the HP Laserjet printer. HEWLETT PACKARD MEDICAL PRODUCTS GROUP, ANDOVER, MA Circle 225 on Reader Service Card

/ cords 8 full 20-mm wide channels at frequencies to 5 KHz in a variety of real-time modes on 8’/2-inch chart paper, printing both the waveform data and the chart grid simultaneously. Mating cables permit simple, direct replacement in existing equipment, allowing a system’soriginal amplifiers to be used with no change in calibration and retraining of personnel.

Cardiographic Versatility After years of steady technologic improvements, Hewlett-Packard is offering two PageWriter II cardiographs with faster and more accurate interpretation. The HP 4755A basic model takes conventional 12-lead or custom-formatted elecrocardiograms, has a 20-ECG storage capacity and includes operator prompting, quick-change pen and noise-measuring bar. The HP 4765A intelligent variant adds built-in measurement, interpretation, adult an& pediatric analysis and full editing capabilities.

ASTRO-MED, INC., WEST WAR WICK, RI Circle 106 on Reader Service Card

Multi-Purpose

Electrocardiograph

The EK-41 is a fully automatic 12-lead electrocardiograph that also includes a heart rate meter and event recorder for documenting single- and multiple-beat HEWLETT PACKARD MEDICAL heart rhythm changes. PRODUCTS GROUP, Record quality is aided by automatic ANDOVER, MA standardization, baseline centering and Circle 195 on Reader Service Card impedance measuring. Noisy traces due to poor contact and loose lead wires are detected before recording. Additional Total Ambulatory ECGSystem features include drop-in paper loading, The HP 43420A system includes a light weight and optional battery operasmall, portable patient analyzer that tion. performs a beat-by-beat analysis of 2 PPG BIOMEDICAL SYSTEMS, channels of ECG during the 24-hour monitoring period, using a specially-de- INC., PLEASANTVILLE, NY veloped arrhythmia algorithm. The an- Circle 160 on Reader Service Card alyzer detects abnormal and normal events, processesthem and saves6-second strip examples in memory (the op- New (I-Channel Recorder tional HP 43405A memory module cap- The MT-8800 direct writing 8-channel tures every beat for the entire 24-hour recorder designed for the cath lab, carmonitoring period). Then, the analyzer diac care, OR and ICU monitoring uses is attached to the HP Vectra personal thermal paper and operates without computer, the recordings are processed pens, styli or other moving parts. It reTHE AMERICAN

JOURNAL

Expandable Multichannel

ECG

Designed to accept future upgraded components or new options, the MC6400 model is a 3/6 channel digital computer ECG with manual, automatic with simultaneous 12-channel data acquisition, 3/6-channel sequential or si-

OF CARDIOLOGY

OCTOBER

1,1988

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