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Noninvasive Estimation of End‐Systolic Aortic Pressure in Children
Author(s) -
IWAHARA MASAZUMI,
BENSON LEE N.,
FREEDOM ROBERT M.
Publication year - 1991
Publication title -
echocardiography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 62
eISSN - 1540-8175
pISSN - 0742-2822
DOI - 10.1111/j.1540-8175.1991.tb01017.x
Subject(s) - cardiology , pulse pressure , medicine , body surface area , stenosis , blood pressure , stepwise regression , cardiac catheterization , ventricular pressure , heart rate , regression analysis , linear regression , mathematics , statistics
To simplify the estimation of end‐systolic aortic pressure ( P es ) noninvasively, a regression equation was derived from intra‐arterial measurements. Peak‐systolic ( P ps ), P es , and diastolic aortic pressure ( P d ), pulse pressure ( P p ), heart rate, hemoglobin, body weight, and height were measured. Cardiac index and body surface area were calculated in 66 patients (17 with aortic runoff lesions, group I; 49 without lesions, group II) with various heart diseases without aortic stenosis (35 males, 31 females, mean age 4.6 years) during the course of diagnostic catheterization. Using a stepwise regression analysis, the following relationship was determined from the combined groups: P es = 0.422* P ps + 0.617* P d + 1.377. The correlation between P es measured directly and P es calculated from our formula was quite strong( r = 0.957, P = 0.0001), as was the correlations between each subgroup ( r = 0.948, group I; r = 0.959, group II). The correlation between P es calculated and that estimated using an indirect carotid pulse tracing method was also strong ( r = 0.912, P = 0.0001, n = 31). This regression equation appears applicable to infants or children with aortic runoff lesions in whom it is difficult to measure P es by noninvasive methods using the carotid pulse. (ECHOCARDIOGRAPHY, Volume 8, September 1991)