Doctors have long known that systolic blood pressure below 120 was considered normal and meant a lower risk of heart disease and kidney problems. But they would often only treat patients if that top number crept above 140, the threshold for officially having high blood pressure.
Recent findings from a large National Institutes of Health study now suggest that it’s worth treating patients in that prehypertension gray area of 120 to 140, in order to bring them down into the normal range.
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