Researchers discovered that gene deserts, non-coding DNA regions, regulate heart and embryo development through enhancer ...

More testing revealed that, in addition to a rapid heart rate, she had sick sinus syndrome, a condition in which the heart's sinoatrial node is damaged and can't produce normal heartbeats.

The rising prevalence of sinoatrial (SA) node dysfunction, attributed to the aging population, is emerging as a critical health issue. The SA node, a natural organoid within the heart, comprises the ...

Abnormally slow heart rates result from breakdowns in two principal areas of the heart. First, the sinoatrial, or SA, node sets your "resting" heart rate, usually somewhere between 60 and 100 beats ...

Abnormally slow heart rates result from breakdowns in two principal areas of the heart. First, the sinoatrial, or SA, node sets your “resting” heart rate, usually somewhere between 60 and 100 beats ...