Telemetry of human electrocardiograms in aerial and aquatic environments

Utsuyama, N; Yamaguchi, Hisao; Obara, Shigeru; Tanaka, Hiroyuki; Fukuta, Shoji; Nakahira, Jun; Tanabe, Shingo; Bando, Eizo; Miyamoto, Hiroshi

doi:10.1109/10.7297

Cited by 14 publications

(7 citation statements)

References 9 publications

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“…The ECG electrodes (VL-00-S, MEDICOTEST, Denmark) were attached according to the routine CM5 lead (Utsuyama et al 1988). The ECG signal was calibrated by four pulses of 1, 2, 3 and 4 mV at the cardiac electrodes.…”

Section: Measurements Of Blood Velocity and Ecgmentioning

confidence: 99%

Blood flow in the carotid artery during breath-holding in relation to diving bradycardia

Pan

Kinouchi

et al. 1997

European Journal of Applied Physiology

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The present study investigated the mechanism of diving bradycardia. A group of 14 healthy untrained male subjects were examined during breath-holding either out of the water (30-33 degrees C), in heat-out immersion, or in whole-body submersion (27-29 degrees C) in a diving pool. Blood velocity, blood volume flow in the carotid artery, diastolic blood pressure and electrocardiogram were measured and recorded during the experiments. The peak blood velocity increased by 13.6% (P < 0.01) and R-wave amplitude increased by 57.1% (P < 0.005) when the subjects entered water from air. End-diastolic blood velocity (Ved) in the carotid artery increased significantly during breath-holding, e.g. Ved increased from 0.20 (SD 0.02) m.s-1 at rest to 0.33 (SD 0.04) m.s-1 (P < 0.001) at 50.0 s in breath-hold submersion to a 2.0-m depth. Blood volume flow in the carotid artery increased by 26.6% (P < 0.05) at 30 s and 36.6% (P < 0.001) at 40 s in breath-hold submersion to a 2.0-m depth. Diastolic blood pressure increased by 15.4% (P < 0.01) at 60 s during breath-holding in head-out immersion. Blood volume flow, Ved and diastolic blood pressure increased significantly more and faster during breath-holding in submersion than out of the water. There was a good negative correlation with the heart rate: the root mean square correlation coefficient r was 0.73 (P < 0.001). It was concluded that an increased accumulation of blood in the aorta and arteries at end-diastole and decreased venous return, caused by an increase in systemic peripheral resistance during breath-holding, underlies diving bradycardia.

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Section: Measurements Of Blood Velocity and Ecgmentioning

confidence: 99%

Blood flow in the carotid artery during breath-holding in relation to diving bradycardia

Pan

Kinouchi

et al. 1997

European Journal of Applied Physiology

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“…The early portable EEG/ECG monitoring devices are based on extensive usage of discrete components [1], [2] or thick-film technology [3] in the AFE design. Although these methodologies benefit short design time in conjunction with a wide choice of discrete analog components, they are bulky for system realization and consume high power dissipation.…”

Section: Afe Implementations For Portable Monitoring Applicationsmentioning

confidence: 99%

“…T HE realization of a portable device for electroencephalograph/electrocardiogram (EEG/ECG) recording is important for monitoring human or nonhuman subjects without restricting their mobility [1]- [7]. With such devices, successful monitoring of a patient's EEG/ECG had been performed on out-field physiological studies [1], [2]. In portable applications, there is a constant demand for reduced device size and weight without impacting recording quality.…”

Section: Introductionmentioning

confidence: 99%

“…The ultimate goal is to make the subject of study unconscious of the existence of the recording device while the EEG/ECG monitoring process is taking place. A feasible solution [2] is to integrate most of the analog front-end (AFE) circuitry onto an IC and perform telemetry on the bio-potential signal to a remote computer. Recently, there has been a few reported AFE implementations using the IC approach [4]- [7] for single bio-potential measurement.…”

Section: Introductionmentioning

confidence: 99%

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A CMOS analog front-end IC for portable EEG/ECG monitoring applications

Chan

2005

IEEE Trans. Circuits Syst. I

183

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A new digital programmable CMOS analog front-end (AFE) IC for measuring electroencephalograph or electrocardiogram signals in a portable instrumentation design approach is presented. This includes a new high-performance rail-to-rail instrumentation amplifier (IA) dedicated to the low-power AFE IC. The measurement results have shown that the proposed biomedical AFE IC, with a die size of 4.81 mm 2 , achieves a maximum stable ac gain of 10 000 V/V, input-referred noise of 0.86 V rms (0.3 Hz-150 Hz), common-mode rejection ratio of at least 115 dB (0-1 kHz), input-referred dc offset of less than 60 V, input common mode range from 1 5 V to 1.3 V, and current drain of 485 A (excluding the power dissipation of external clock oscillator) at a 1.5-V supply using a standard 0.5-m CMOS process technology.

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“…The primary goal is to process the ECG/EEG monitoring system in the absence of consciousness of the biological subject [9]- [12]. It can be accomplished by using an integration of IC , and combining with Analog circuitry used at the front end and a remote computer can be used to perform the telemetry operation on the bio-potential signals [10]. In order to measure a single bio-potential signal, a few researchers [12]- [15] have been reported the implementation of AFE using the IC approach.…”

Section: Introductionmentioning

confidence: 99%

Impact on Gain and Noise : ECG Amplifier & Comb Filter Design using OTA

B¹,

Prasad²,

Kamaraju³

2019

IJEAT

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The research paper ventures a novel modelling strategy of finite gain and noise of an electrocardiogram (ECG) amplifier at 0.18, 0.5 and 0.9 micron standard CMOS technologies respectively. An active comb filter is used to design the amplifier for removing the selected frequencies of numerous signals. The presented filter is configured with only Operational Transconductance Amplifiers (OTAs) and capacitors that makes it apt for implementation of monolithic integrated circuits (ICs). The relevance of this analog circuit is verified for a suitable test signal of 60 Hz as in the ECG signal. Using Cadence Virtuoso analog design environment, the effect of transistor channel length and width is examined for analysis of noise and bandwidth. It is observed that the performance in terms of noise and gain considerably increases for advanced technology node. However, for a suitable supply of bias current, a portable ECG system can also provide an improved bandwidth performance of advanced CMOS technology

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Telemetry of human electrocardiograms in aerial and aquatic environments

Cited by 14 publications

References 9 publications

Blood flow in the carotid artery during breath-holding in relation to diving bradycardia

Blood flow in the carotid artery during breath-holding in relation to diving bradycardia

A CMOS analog front-end IC for portable EEG/ECG monitoring applications

Impact on Gain and Noise : ECG Amplifier & Comb Filter Design using OTA

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