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A COMPARISON OF SIMULTANEOUS POLYGRAPH AND MICROGRAPH TRACINGS
From a study of the accompanying tracings we may conclude that: 1. The delicate mechanism of the micrograph registers the movements in the heart and blood-vessels more accurately than does the polygraph. 2. The inertia of the polygraph lever and diaphragm distorts the tracing. The difference between...
Autores principales: | , , |
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Formato: | Texto |
Lenguaje: | English |
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The Rockefeller University Press
1912
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2124972/ https://www.ncbi.nlm.nih.gov/pubmed/19867573 |
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author | Meara, Frank S. Coffen, T. Homer Crehore, Albert C. |
author_facet | Meara, Frank S. Coffen, T. Homer Crehore, Albert C. |
author_sort | Meara, Frank S. |
collection | PubMed |
description | From a study of the accompanying tracings we may conclude that: 1. The delicate mechanism of the micrograph registers the movements in the heart and blood-vessels more accurately than does the polygraph. 2. The inertia of the polygraph lever and diaphragm distorts the tracing. The difference between the results obtained with the two instruments is shown by the records made simultaneously with the micrograph and the polygraph. 3. The micrograph is particularly useful for recording heart sounds. Some records illustrating this are shown. We are directing especial attention to this and will report the results in a subsequent paper. 4. While the micrograph will not supersede the polygraph or electrocardiograph, we feel that it has distinct possibilities as a clinical instrument. |
format | Text |
id | pubmed-2124972 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1912 |
publisher | The Rockefeller University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-21249722008-04-18 A COMPARISON OF SIMULTANEOUS POLYGRAPH AND MICROGRAPH TRACINGS Meara, Frank S. Coffen, T. Homer Crehore, Albert C. J Exp Med Article From a study of the accompanying tracings we may conclude that: 1. The delicate mechanism of the micrograph registers the movements in the heart and blood-vessels more accurately than does the polygraph. 2. The inertia of the polygraph lever and diaphragm distorts the tracing. The difference between the results obtained with the two instruments is shown by the records made simultaneously with the micrograph and the polygraph. 3. The micrograph is particularly useful for recording heart sounds. Some records illustrating this are shown. We are directing especial attention to this and will report the results in a subsequent paper. 4. While the micrograph will not supersede the polygraph or electrocardiograph, we feel that it has distinct possibilities as a clinical instrument. The Rockefeller University Press 1912-09-01 /pmc/articles/PMC2124972/ /pubmed/19867573 Text en Copyright © Copyright, 1912, by The Rockefeller Institute for Medical Research New York This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/). |
spellingShingle | Article Meara, Frank S. Coffen, T. Homer Crehore, Albert C. A COMPARISON OF SIMULTANEOUS POLYGRAPH AND MICROGRAPH TRACINGS |
title | A COMPARISON OF SIMULTANEOUS POLYGRAPH AND MICROGRAPH TRACINGS |
title_full | A COMPARISON OF SIMULTANEOUS POLYGRAPH AND MICROGRAPH TRACINGS |
title_fullStr | A COMPARISON OF SIMULTANEOUS POLYGRAPH AND MICROGRAPH TRACINGS |
title_full_unstemmed | A COMPARISON OF SIMULTANEOUS POLYGRAPH AND MICROGRAPH TRACINGS |
title_short | A COMPARISON OF SIMULTANEOUS POLYGRAPH AND MICROGRAPH TRACINGS |
title_sort | comparison of simultaneous polygraph and micrograph tracings |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2124972/ https://www.ncbi.nlm.nih.gov/pubmed/19867573 |
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