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X Demographics
Mendeley readers
Attention Score in Context
| Title |
Left ventricular function: time-varying elastance and left ventricular aortic coupling
|
|---|---|
| Published in |
Critical Care, September 2016
|
| DOI | 10.1186/s13054-016-1439-6 |
| Pubmed ID | |
| Authors |
Keith R. Walley |
| Abstract |
Many aspects of left ventricular function are explained by considering ventricular pressure-volume characteristics. Contractility is best measured by the slope, Emax, of the end-systolic pressure-volume relationship. Ventricular systole is usefully characterized by a time-varying elastance (ΔP/ΔV). An extended area, the pressure-volume area, subtended by the ventricular pressure-volume loop (useful mechanical work) and the ESPVR (energy expended without mechanical work), is linearly related to myocardial oxygen consumption per beat. For energetically efficient systolic ejection ventricular elastance should be, and is, matched to aortic elastance. Without matching, the fraction of energy expended without mechanical work increases and energy is lost during ejection across the aortic valve. Ventricular function curves, derived from ventricular pressure-volume characteristics, interact with venous return curves to regulate cardiac output. Thus, consideration of ventricular pressure-volume relationships highlight features that allow the heart to efficiently respond to any demand for cardiac output and oxygen delivery. |
X Demographics
The data shown below were collected from the profiles of 23 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Malaysia | 3 | 13% |
| Mexico | 3 | 13% |
| Italy | 2 | 9% |
| United Kingdom | 2 | 9% |
| India | 1 | 4% |
| Norway | 1 | 4% |
| Ecuador | 1 | 4% |
| Turkey | 1 | 4% |
| Thailand | 1 | 4% |
| Other | 3 | 13% |
| Unknown | 5 | 22% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 12 | 52% |
| Practitioners (doctors, other healthcare professionals) | 9 | 39% |
| Science communicators (journalists, bloggers, editors) | 2 | 9% |
Mendeley readers
The data shown below were compiled from readership statistics for 288 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | <1% |
| Denmark | 1 | <1% |
| Italy | 1 | <1% |
| South Africa | 1 | <1% |
| Unknown | 284 | 99% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 38 | 13% |
| Student > Bachelor | 34 | 12% |
| Student > Ph. D. Student | 33 | 11% |
| Other | 29 | 10% |
| Student > Master | 28 | 10% |
| Other | 66 | 23% |
| Unknown | 60 | 21% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 131 | 45% |
| Engineering | 43 | 15% |
| Biochemistry, Genetics and Molecular Biology | 9 | 3% |
| Agricultural and Biological Sciences | 6 | 2% |
| Nursing and Health Professions | 5 | 2% |
| Other | 18 | 6% |
| Unknown | 76 | 26% |
Attention Score in Context
This research output has an Altmetric Attention Score of 15. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 18 June 2019.
All research outputs
#2,368,151
of 25,373,627 outputs
Outputs from Critical Care
#2,061
of 6,554 outputs
Outputs of similar age
#39,399
of 335,125 outputs
Outputs of similar age from Critical Care
#58
of 119 outputs
Altmetric has tracked 25,373,627 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 90th percentile: it's in the top 10% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 6,554 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 20.8. This one has gotten more attention than average, scoring higher than 68% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 335,125 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 88% of its contemporaries.
We're also able to compare this research output to 119 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 51% of its contemporaries.