Researchers using a wearable device have uncovered a hidden driver of high blood pressure that standard tests frequently overlook. The device tracked hormone levels around the clock and found that surges in aldosterone—a hormone that regulates salt and blood pressure—occur primarily at night, when routine blood draws are rarely performed.
This pattern may explain why primary aldosteronism, a common but underdiagnosed cause of hypertension, often goes undetected. Conventional tests typically measure aldosterone during the day, missing the nocturnal spikes that the wearable captured. The findings suggest that timing is critical for accurate diagnosis.
The study, reported by ScienceDaily, does not yet offer a clinical protocol, but it highlights a promising path forward. If confirmed, wearable monitoring could become a standard tool for identifying patients who would otherwise be misclassified as having essential hypertension, enabling more targeted treatment.