Led by Dr. Rodrigo M. Lago of the Framingham Heart Study, Framingham, Mass., the researchers analyzed the relationship between serum sodium levels and blood pressure in nearly 2,200 subjects from a long-term study of cardiovascular disease risk factors. At the start of the study, none of the subjects had high blood pressure (hypertension). Each subject's blood pressure was defined as optimal, normal, or high-normal.
Serum sodium level increased with age. In addition, subjects with higher sodium levels had a higher rate of diabetes and a higher creatinine level (suggesting decreased kidney function).Sodium Level Does Not Predict Blood Pressure, Now or in the Future
During four years' follow-up, blood pressure increased by at least one stage (for example, from normal to high-normal) in 37 percent of subjects. This included the development of high blood pressure in 15 percent of subjects.
However, the risk of increasing blood pressure was unrelated to serum sodium level. In fact, subjects in the highest serum sodium category were at lower risk of developing high blood pressure.
There is a well-known link between high levels of sodium in the diet and the risk of high blood pressure. More recent studies have suggested that higher levels of sodium on routine blood tests might be linked to increased blood pressure. These studies raised the interesting possibility that variations in serum sodium level might explain some of the variation in blood pressure in the population. If so, then measuring serum sodium might provide a way of predicting a person's future risk of high blood pressure.
Meanwhile, Dr. Lago and colleagues emphasize that their results do not negate the "critical role" of salt in the diet. More likely, they reflect the body's "tight regulation of serum sodium within a narrow physiologic range." In other words, since the range of normal sodium levels is so small, variations in serum sodium aren't a good indicator of hypertension risk.About Journal of Hypertension
Wolters Kluwer Health is a division of Wolters Kluwer, a leading global information services and publishing company with annual revenues (2007) of €3.4 billion ($4.8 billion), maintains operations in over 33 countries across Europe, North America, and Asia Pacific and employs approximately 19,500 people worldwide. Visit www.wolterskluwer.com for information about our market positions, customers, brands, and organization.
Katherine Alexander | Newswise Science News
Team discovers how bacteria exploit a chink in the body's armor
20.01.2017 | University of Illinois at Urbana-Champaign
Rabies viruses reveal wiring in transparent brains
19.01.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences