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In this monograph Cammarota makes a complete study of the "mean arterial tension" in relation to health and disease. The mean arterial tension, as defined by the author, is that constant pressure which at a given time causes the body tissues to have the same energy as the variable tension in the vessels. That pressure, so described, has no relation to the arithmetical mean pressure (one-half the sum of the systolic and diastolic values), and in order to make a distinction it is called the mean arterial tension.
After a preliminary use of several instruments the author chose for his studies the spring oscillograph devised by Frank Soler, of Argentine, and found that the mean arterial pressure varied extensively in different subjects who were apparently in good health; consequently no definite standard figures could be obtained.
Cammarota studied the mean arterial pressure in relation to aortic regurgitation, hypertension and hypotension,
La tension mediana dinamica.. Arch Intern Med (Chic). 1937;59(3):558-559. doi:10.1001/archinte.1937.00170190193012