Related Experiment Video
Updated: Feb 2, 2026
09:31
Hemodynamic Precision in the Neonatal Intensive Care Unit using Targeted Neonatal Echocardiography
Published on: January 27, 2023
1.6K
Relationship between climate and hemodynamics according to echocardiography
Zach Rozenbaum1,2, Yan Topilsky1,2, Shafik Khoury1,2
1Department of Cardiology, Tel Aviv Medical Center , Tel Aviv , Israel.
Journal of Applied Physiology (Bethesda, Md. : 1985)
|November 22, 2018
Summary
Local climate significantly impacts heart function, affecting blood flow and diastolic function in ambulatory patients. Hotter weather is linked to improved hemodynamic measures, including stroke volume and ejection fraction, and reduced pulmonary artery pressure.
Area of Science:
- Cardiovascular Physiology
- Environmental Health
- Medical Climatology
Background:
- Controlled studies indicate environmental heat influences circulatory dynamics.
- The impact of local climate on hemodynamics in ambulatory patients remains less understood.
- Echocardiography provides a non-invasive method to assess hemodynamic parameters.
Purpose of the Study:
- To investigate the association between local climate conditions and hemodynamic parameters measured by echocardiography.
- To determine if seasonal variations in temperature and humidity affect cardiovascular function in a large patient cohort.
- To specifically analyze the influence of thermal stress on diastolic function and pulmonary artery pressure.
Main Methods:
- Retrospective analysis of 11,348 echocardiograms from ambulatory patients (≥18 years) between January 2012 and July 2016.
- Correlation of echocardiographic data with daily climate metrics including discomfort index, apparent temperature, and thermal index.
- Comparison of hemodynamic parameters between hotter months (June-November) and colder months (December-May).
Main Results:
- Climate indices showed direct correlations with stroke volume and mitral e' (a measure of diastolic function), and inverse correlation with systolic pulmonary artery pressure (SPAP).
- Echocardiograms performed during hotter months were associated with a lower likelihood of impaired diastolic function (e' septal < 7 cm/s) and elevated SPAP (> 40 mmHg).
- Hotter days and seasons were linked to higher mitral e', stroke volume, ejection fraction, and lower SPAP and tricuspid regurgitation.
Conclusions:
- Local climate and environmental thermal stress demonstrably affect hemodynamic parameters in ambulatory patients.
- Diastolic function, specifically mitral e' values, and pulmonary artery pressure are notably influenced by climatic conditions.
- Findings suggest that climate should be considered as a potential confounding factor in echocardiographic assessments of cardiovascular health.
Related Concept Videos
01:50Global Climate Change
28.9K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
28.9K
01:16What is Climate?
20.9K
Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
20.9K
02:12Relationship Formation
46.2K
What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...
46.2K
01:28Ending Relationships
189
The dissolution of intimate relationships presents complex emotional and psychological challenges, particularly when emotional bonds are strong, the relationship is long-standing, and perceived alternatives are limited. This distress often intensifies in romantic breakups, where the initiator may experience greater turmoil than the rejected partner. Contributing factors include residual attachment, guilt over causing pain, and uncertainty about how to manage the situation. The stress is further...
189
01:27Relationship Growth
218
Interpersonal relationships progress through stages, beginning with awareness and moving toward mutuality, where emotional connections deepen. While many relationships remain at moderate levels of mutuality, deeper connections form through self-disclosure, trust, and interdependence.Self-DisclosureSelf-disclosure involves revealing personal information, starting with surface-level details and gradually progressing to more intimate content. As trust grows, individuals feel more comfortable...
218
01:30Social Relationships and Well-Being
313
The significance of social relationships in psychological well-being is a well-established area of inquiry within social psychology. Research consistently demonstrates that the presence of meaningful, supportive relationships enhances emotional health, while the absence or deterioration of such connections can contribute to psychological distress. Relationships serve as a foundation for emotional support, identity, and social belonging, all of which are critical to an individual’s overall...
313