The sinus node powers electrical stimulation through the heart, causing it to contract, first the upper chambers and then the lower chambers. The heart’s contraction is what causes it to beat.

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 ...

SARS-CoV-2 Infection Induces Ferroptosis of Sinoatrial Node Pacemaker Cells. Circulation Research, 2022; 130 (7): 963 DOI: 10.1161/CIRCRESAHA.121.320518 ...

Did you know that certain medications can cause symptom of 'Sinoatrial node dysfunction'. Find these drugs listed on the page and be warned of similar symptoms as possible side-effects.

Heart Rate Mystery Unveiled: Sex Differences in Human Sinoatrial Node Genes and Female Tachycardia. Circulation: Arrhythmia and Electrophysiology, 2025; DOI: 10.1161/CIRCEP.124.013534 ...

First, the sinoatrial, or SA, node sets your “resting” heart rate, usually somewhere between 60 and 100 beats per minute. This is the base effort needed to circulate enough blood to sustain ...