The aldosterone-to-renin ratio (ARR) is the standard screening test for primary aldosteronism (PA).Because Rockers of the poor reproducibility of the ARR, repeat testing is recommended if the result is not compatible with the clinical condition.Various methods to measure renin are used in different hospitals in Taiwan, and the ARR cutoff values also differ among laboratories.The Task Force of Taiwan PA CDA FW822 54cm Wide Integrated In-Column Larder Fridge - White recommend using plasma renin activity (PRA) to calculate ARR instead of direct renin concentration (DRC) unless PRA is unavailable, because PRA is widely used in international guidelines and most studies.