Studies on the estimation of cardiac ouptut in man, and of abnormalities in cardiac function, from the heart's recoil and the blood's impacts; the ballistocardiogram

doi:10.1152/AJPLEGACY.1939.127.1.1

Journal Article•DOI•

Studies on the estimation of cardiac ouptut in man, and of abnormalities in cardiac function, from the heart's recoil and the blood's impacts; the ballistocardiogram

Isaac Starr, A. J. Rawson, Henry A. Schroeder, N. Joseph

31 Jul 1939-American Journal of Physiology (American Physiological Society)-Vol. 127, Iss: 1, pp 1-28

About: This article is published in American Journal of Physiology.The article was published on 1939-07-31. It has received 382 citations till now. The article focuses on the topics: Cardiac function curve.

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Journal Article•DOI•

The effects of altered arterial tensions of carbon dioxide and oxygen on cerebral blood flow and cerebral oxygen consumption of normal young men

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Seymour S. Kety¹, Carl F. Schmidt•Institutions (1)

University of Pennsylvania¹

01 Jul 1948-Journal of Clinical Investigation

TL;DR: Evidence bearing on the intrinsic control of the human cerebral circulation as revealed by quantitative measurements is derived.

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Abstract: A method for measuring quantitatively the volume of cerebral blood flow in man by inhalation of nitrous oxide (1) found its first application in a study of the cerebral circulatory effects of low CO2 tension achieved by hyperventilation; of high CO2 tension, and of high and low 02 tensions obtained by inhalation of appropriate gas mixtures (2). Only the first part of this study, the effects of active and passive hyperventilation, has been published in detail (3). The purpose of the present paper is to present the remainder of these findings and to derive from them, together with those of the hyperventilation experiments, evidence bearing on the intrinsic control of the human cerebral circulation as revealed by quantitative measurements.

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1,768 citations

Cites methods from "Studies on the estimation of cardia..."

...These were used for calculation of a value for cardiac output from the formula of Starr and associates (6), using the correction factor of 1....
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Journal Article•DOI•

Toward Ubiquitous Blood Pressure Monitoring via Pulse Transit Time: Theory and Practice.

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Ramakrishna Mukkamala¹, Jin-Oh Hahn², Omer T. Inan³, Lalit Keshav Mestha⁴, Chang-Sei Kim², Hakan Toreyin³, Survi Kyal⁴ - Show less +3 more•Institutions (4)

Michigan State University¹, University of Maryland, College Park², Georgia Institute of Technology³, PARC⁴

05 Jun 2015-IEEE Transactions on Biomedical Engineering

TL;DR: This review explains the conventional BP measurement methods and their limitations; presents models to summarize the theory of the PTT-BP relationship; outlines the approach while pinpointing the key challenges; and discusses realistic expectations for the approach.

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Abstract: Ubiquitous blood pressure (BP) monitoring is needed to improve hypertension detection and control and is becoming feasible due to recent technological advances such as in wearable sensing. Pulse transit time (PTT) represents a well-known potential approach for ubiquitous BP monitoring. The goal of this review is to facilitate the achievement of reliable ubiquitous BP monitoring via PTT. We explain the conventional BP measurement methods and their limitations; present models to summarize the theory of the PTT-BP relationship; outline the approach while pinpointing the key challenges; overview the previous work toward putting the theory to practice; make suggestions for best practice and future research; and discuss realistic expectations for the approach.

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648 citations

Cites background from "Studies on the estimation of cardia..."

...Contact Methods: Ballistocardiography (BCG) measures the reactionary forces of the body in response to cardiac ejection of blood into the aorta [99]–[101]....
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Proceedings Article•DOI•

Detecting Pulse from Head Motions in Video

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Guha Balakrishnan¹, Frédo Durand¹, John V. Guttag¹•Institutions (1)

Massachusetts Institute of Technology¹

23 Jun 2013

TL;DR: This method tracks features on the head and performs principal component analysis (PCA) to decompose their trajectories into a set of component motions and chooses the component that best corresponds to heartbeats based on its temporal frequency spectrum.

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Abstract: We extract heart rate and beat lengths from videos by measuring subtle head motion caused by the Newtonian reaction to the influx of blood at each beat. Our method tracks features on the head and performs principal component analysis (PCA) to decompose their trajectories into a set of component motions. It then chooses the component that best corresponds to heartbeats based on its temporal frequency spectrum. Finally, we analyze the motion projected to this component and identify peaks of the trajectories, which correspond to heartbeats. When evaluated on 18 subjects, our approach reported heart rates nearly identical to an electrocardiogram device. Additionally we were able to capture clinically relevant information about heart rate variability.

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580 citations

Additional excerpts

...The idea of exploiting Newton’s Third Law to measure cardiac activity dates back to at least the 1930’s, when the ballistocardiogram (BCG) was invented [15]....
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Journal Article•DOI•

Ballistocardiography and Seismocardiography: A Review of Recent Advances

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Omer T. Inan¹, Pierre-François Migeotte², Kwang Suk Park³, Mozziyar Etemadi⁴, Kouhyar Tavakolian⁵, Ramon Casanella⁶, John Zanetti, Jens Tank⁷, I.I. Funtova, G. Kim Prisk⁸, Marco Di Rienzo - Show less +7 more•Institutions (8)

Georgia Institute of Technology¹, Université libre de Bruxelles², Seoul National University³, University of California, San Francisco⁴, University of North Dakota⁵, Polytechnic University of Catalonia⁶, Hochschule Hannover⁷, University of California, San Diego⁸

01 Jul 2015

TL;DR: The recent advances in modern BCG and SCG research are reviewed, including reduced measurement noise, clinically relevant feature extraction, and signal modeling.

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Abstract: In the past decade, there has been a resurgence in the field of unobtrusive cardiomechanical assessment, through advancing methods for measuring and interpreting ballistocardiogram (BCG) and seismocardiogram (SCG) signals. Novel instrumentation solutions have enabled BCG and SCG measurement outside of clinical settings, in the home, in the field, and even in microgravity. Customized signal processing algorithms have led to reduced measurement noise, clinically relevant feature extraction, and signal modeling. Finally, human subjects physiology studies have been conducted using these novel instruments and signal processing tools with promising results. This paper reviews the recent advances in these areas of modern BCG and SCG research.

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558 citations

Cites background or methods from "Studies on the estimation of cardia..."

...1) Modeling the Recording Device: During the early years of ballistocardiographic research, several different instruments were used to measure BCGs, from beds hanging from the ceiling [84] to tables strongly coupled to ground [1]....
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...surements, representing what was supposed to be the largest projection of the 3-D forces resulting from cardiac ejection [1]....
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...Nearly 60 years later, Starr and colleagues created an instrument in the form of a table with a mobile top surface to measure the BCG in a repeatable scientific manner [1]....
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...ture [1], while the seismocardiogram (SCG) represents the local vibrations of the chest wall in response to the heartbeat [2]....
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...physician would read the recording to make a diagnosis regarding the patient’s cardiovascular health [1], [5]....
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