HE HEMODYNAMICS OF HYPERTENSION have not been a popular subject for review. In 1938 Wiggers (246) summarized primarily the excellent work of his own group on this subject. It is fitting that a fresh attempt be made to correlate the hemodynamic features of hypertension, particularly as it is evidenced in man, with current physioIogica1 concepts. In such a broad coverage, material presented in previous reviews of cardiovascular function must be discussed. It is hoped that these excursions will not be considered a reiteration of the obvious. To provide an organizationa framework the hemodynamic features are considered in relation to the various functional subdivisions of the cardiovascular system. Certain aspects not readily covered on this basis are discussed in separate sections.