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Multifractal Desynchronization of the Cardiac Excitable Cell Network During Atrial Fibrillation. II. Modeling
In this study, we elaborate on a tentative interpretation of the observed intermittent dynamics during AF as the signature of synaptic plasticity. Typical individual GJC transition times between open and closed states were shown to be much longer than those of membrane polarization but compare well with membrane recovery time (≳ 100ms) (Spray et al., 1984; Neyton and Trautmann, 1986; Wang et al., 1992; Bukauskas and Verselis, 2004; Desplantez et al., 2007). Moreover, slow gating modulations have been evidenced due to cytoplasmic protons (low pH) and free calcium (Spray et al., 1984; Burt and Sray, 1988; Kumar and G...
Source: Frontiers in Physiology - April 23, 2019 Category: Physiology Source Type: research

A New Study Shows How Seriously Air Pollution Can Affect Your Heartbeat
For China’s 1.4 billion people, the simple act of breathing has long been something of a risk. Living in the ninth-dirtiest country in the world in terms of air quality, China’s residents lose an average of 2.6 years of life per capita due to atmospheric pollution alone. The greatest risk, of course, is pulmonary, with air pollution leading to shortness of breath, wheezing, coughing, asthma episodes, and chest pain. But pollution affects the heart too; the U.S. Environmental Protection Agency reports that exposure to fine-particulate matter as well as to nitrogen oxides alone can lead to premature aging in bloo...
Source: TIME: Health - May 1, 2023 Category: Consumer Health News Authors: Jeffrey Kluger Tags: Uncategorized climate change Climate Is Everything Environment healthscienceclimate Source Type: news