Recent quotes:

The heart: Digital or analog? Researchers shed dramatic light on heart bioelectricity disorders -- ScienceDaily

"Sodium channels are literally stuck together between cells in way that seems to ensure that the firing of channels in one cell sparks partnering channels in the neighboring cell," Gourdie said. "The molecular machinery seems to be in place for bioelectrical signals to step between heart cells, not wholly unlike how impulses jump between nerve cells in a stepping-stone-like manner at neural synapses."

Association of Depressive Symptoms and Heart Rate Variability in Vietnam War–Era Twins: A Longitudinal Twin Difference Study | JAMA Psychiatry | JAMA Network

The association between depression and autonomic dysregulation, indexed by HRV, is bidirectional, with stronger evidence suggesting that autonomic function affects depression risk rather than vice versa.

Association of Depressive Symptoms and Heart Rate Variability in Vietnam War–Era Twins: A Longitudinal Twin Difference Study | Cardiology | JAMA Psychiatry | JAMA Network

The association between depression and autonomic dysregulation, indexed by HRV, is bidirectional, with stronger evidence suggesting that autonomic function affects depression risk rather than vice versa. The opposite causal pathway from depression to lower HRV is mostly driven by antidepressant use. These findings highlight an important role of autonomic nervous system in the risk of depression and contribute new understanding of the mechanisms underlying the comorbidity of depression and cardiovascular disease.

Meditation could help anxiety and cardiovascular health -- ScienceDaily

In "Mindfulness Meditation Reduces Aortic Pulsatile Load and Anxiety in Mild to Moderately Anxious Adults," Durocher, along with fellow researchers Hannah Marti, a recent Michigan Tech graduate, Brigitte Morin, lecturer in biological science, and Travis Wakeham, a graduate student, explains the finding that 60 minutes after meditating the 14 study participants showed lower resting heart rates and reduction in aortic pulsatile load -- the amount of change in blood pressure between diastole and systole of each heartbeat multiplied by heart rate. Additionally, shortly after meditating, and even one week later, the group reported anxiety levels were lower than pre-meditation levels.