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In this essay, Freis provided definitions and overviews of the various classifications of hypertension: borderline, mild, moderate, moderately severe, and severe. He indicated that although most patients diagnosed with borderline hypertension, and many with mild hypertension, would not necessarily receive drug therapy, physicians should be diligent in following-up with these patients since their condition could easily progress.
Periodical. Freis, Edward D. "The Clinical Spectrum of Essential Hypertension." Archives of Internal Medicine 133, (June 1974): 982-987. Article. 6 Images.. Archives of Internal Medicine