Open AccessNew approaches to noninvasive assessment of pulmonary artery pressure
Author(s) -
Mirrakhimov M. M.,
Tenenbaum A. M.,
Moldotashev I. K.,
Niazova Z. A.,
Zlatkovsky M. L.
Publication year - 1992
Publication title -
clinical cardiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.263
H-Index - 72
eISSN - 1932-8737
pISSN - 0160-9289
DOI - 10.1002/clc.4960151105
Subject(s) - medicine , cardiology , reproducibility , pulmonary artery , blood pressure , statistics , mathematics
Direct measurement of pulmonary artery pressure (PAP) was performed in 36 patients; right ventricular (RV) isovolumic relaxation time (IRT) and RV systolic output acceleration time (AcT) values were assessed by pulsed Doppler and 2‐M echocardiography. There was a fairly good correlation between RV IRT and systolic PAP (r=0.898; SEE=7.8 mmHg) and a somewhat weaker one between RV AcT and systolic PAP (r=‐0.880; SEE=8.37 mmHg). Correlation coefficients were the highest between systolic PAP and the (RVIRT/RVIRT+RV AcT) 2 predictor.r:=145x 2 +14 (r=0.972; SEE=4.14), and also between mean PAP and the 10 −RV AcT/100 predictor: y=158x + 6.7 (r=0.951; SEE = 3.48 mmHg). With ±5 mmHg deviations, systolic PAP measurements were accurate in 78% and those of mean PAP in 98% of the patients. The double‐blind assessment of the reproducibility of the suggested noninvasive PAP measurement was performed in 18 subsequent patients; the interstudy variability of the measurement was 0.88 ± 0.94 mmHg and 1.22 ± 1.23 mmHg (p>0.05), whereas interobserver variability was 1.90±1.70 mmHg and 1.67±1.63 mmHg, respectively (p>0.05). Thus, a combined use of the most informative intervals of RV cycle—IRT and AcT—contributes to the accuracy of noninvasive PAP measurement.