Human Research Facility Holter Monitor (Holter) - 11.22.16
The Human Research Facility Holter Monitor (Holter) is a battery-powered, noninvasive electrocardiogram (ECG) device that accurately measures the heart rate of crewmembers over an extended period of time (up to 24 or 48 hours). ECG information is stored on a Portable Computer Memory Card International Adapter (PCMCIA) card and downlinked to Earth for analysis after monitoring is complete. Science Results for Everyone
Information Pending Facility Details
Cynthia P. Haven, Johnson Space Center, Houston, TX, United States
NASA Johnson Space Center, Human Research Program, Houston, TX, United States
Sponsoring Space Agency
National Aeronautics and Space Administration (NASA)
Human Exploration and Operations Mission Directorate (HEOMD)
ISS Expedition Duration
April 2006 - October 2009
- The Human Research Facility Holter Monitor (Holter) is a modified commercial off-the-shelf (COTS) device that accurately records the electrical activity of a crewmember's heart over an extended period of time (up to 24 or 48 hours). This noninvasive electrocardiogram (ECG) device supported experiments on the ISS between its launch in Expedition 13 and replacement during Expedition 18.
- The Holter is a three-channel, seven-lead ECG that can be placed in a variety of configurations, powered by one, two, or three 9V alkaline batteries, depending on the length of recording and desired sampling rate.
- The Holter contains a removable Portable Computer Memory Card International Adapter (PCMCIA) card that allows the data to be stored, downloaded to a personal computer, and downlinked.
- When in use, the Holter is placed in a Nomex pouch that is strapped around the crewmember's waist.
- An event marker on the monitor allows the subject to mark the time at which symptoms or specific activities take place. The Holter's input voltage is 5 mV (±2.5 mV from baseline) at x1.0 gain and 10 mV (±5 mV from baseline) at x0.5 gain.
- At the end of a session using the Holter, the crewmember deactivates, doffs, and stows the hardware. To download data, the crewmember removes the Portable Computer Memory Card International Adapter (PCMCIA) card, plugs the card into the Human Research Facility personal computer, and activates the data download.
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NASA Image: JSC2006E01969 - Astronaut Clayton Anderson trains for Expedition 14 Holter operations with instructor Ashley Weaver at the Johnson Space Center in Houston.
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