The dual displacement and velocity ballistocardiograph apparatus

Pordy, L; Chesky, Kenneth; Mastér, Arthur M.; Taymor, Robert C.; Moser, Marvin

doi:10.1016/0002-8703(52)90149-x

Cited by 10 publications

(2 citation statements)

References 19 publications

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“…This method has been described elsewhere. ", 16 Tracings were recorded on either a single channel, direct writing electrocardiograph records of both the photoelectric (displacement) and electromagnetic (velocity) types may be recorded either simultaneously or successively.…”

Section: Methodsmentioning

confidence: 99%

“…The crossbar is then placed on the shins between the light source above and the photocell below. Standard The ballistocardiographic apparatus used was devised by one of us (L. P.) 16 The hinges described by Dock' alone in six cases and a low I wave in combination with a notched J wave in seven patients. Angina pectoris after infarction was noted much more frequently in the patients with abnormal ballistocardiograms than in those with normal ballistocardiographic records.…”

Section: Methodsmentioning

confidence: 99%

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The Ballistocardiogram in Myocardial Infarction: A Study of One Hundred Cases

et al. 1952

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In the presence of previous myocardial infarction, the direct ballistocardiogram is abnormal in approximately 80 per cent of the cases. Following the coronary occlusion, a normal ballistocardiogram is relatively rare in patients with angina pectoris as compared with those who are asymptomatic. There is no correlation between the ballistocardiographic patterns and the persistence of electrocardiographic evidence of myocardial infarction. The prognostic significance of the ballistic findings reported will be determined by long-term follow-up studies.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

The Ballistocardiogram in Myocardial Infarction: A Study of One Hundred Cases

et al. 1952

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The physical rationale of ballistocardiography

Kesselman¹,

Grishman²

1957

Bulletin of Mathematical Biophysics

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Optical Vibrocardiography: A Novel Tool for the Optical Monitoring of Cardiac Activity

et al. 2006

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We present an optical non-contact method for heart beat monitoring, based on the measurement of chest wall movements induced by the pumping action of the heart, which is eligible as a surrogate of electrocardiogram (ECG) in assessing both cardiac rate and heart rate variability (HRV). The method is based on the optical recording of the movements of the chest wall by means of laser Doppler interferometry. To this aim, the ECG signal and the velocity of vibration of the chest wall, named optical vibrocardiography (VCG), were simultaneously recorded on 10 subjects. The time series built from the sequences of consecutive R waves (on ECG) and vibrocardiographic (VV) intervals were compared in terms of heart rate (HR). To evaluate the ability of VCG signals as quantitative marker of the autonomic activity, HRV descriptors were also calculated on both ECG and VCG time series. HR and HRV indices obtained from the proposed method agreed with the rate derived from ECG recordings (mean percent difference <3.1%). Our comparison concludes that optical VCG provides a reliable assessment of HR and HRV analysis, with no statistical differences in term of gender are present. Optical VCG appears promising as non-contact method to monitor the cardiac activity under specific conditions, e.g., in magnetic resonance environment, or to reduce exposure risks to workers subjected to hazardous conditions. The technique may be used also to monitor subjects, e.g., severely burned, for which contact with the skin needs to be minimized.

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The dual displacement and velocity ballistocardiograph apparatus

Cited by 10 publications

References 19 publications

The Ballistocardiogram in Myocardial Infarction: A Study of One Hundred Cases

The Ballistocardiogram in Myocardial Infarction: A Study of One Hundred Cases

The physical rationale of ballistocardiography

Optical Vibrocardiography: A Novel Tool for the Optical Monitoring of Cardiac Activity

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