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The Human Research Facility Holter Monitor (Holter) is a battery-powered, noninvasive electrocardiogram (ECG) device that accurately measures the heart rate of crew members 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.〔http://www.nasa.gov/mission_pages/station/science/experiments/Holter.html〕 ==Description== Facility Summary : * The Human Research Facility Holter Monitor (Holter) is a modified commercial off-the-shelf (COTS) device that accurately records the electrical activity of a crew-member's heart over an extended period of time (up to 24 or 48 hours). This noninvasive electrocardiogram (ECG) device is available to support future experiments. * 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. The Human Research Facility Holter Monitor (Holter) measures and records the electrical activity of a crew member's heart. The Holter is a battery-powered digital recorder that is capable of recording the electrocardiogram (ECG) data continuously for up to 24 or 48 hours. The Holter currently in use on the International Space Station is manufactured by Spacelabs Healthcare, Incorporated, of Issaquah, Washington. The Holter measures heart rates ranging from 0 to 240 beats per minute (bpm) at a sampling rate of 128 or 256 Hz. It measures ECG signals ranging from -2.5 to +2.5 mV (normal mode) and -5 to +5 mV (half-gain mode) at a sampling rate of 128 Hz or 256 Hz with an accuracy of +/- 2 percent of full range. 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Human Research Facility Holter Monitor」の詳細全文を読む スポンサード リンク
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