TY - JOUR
T1 - Septal/Free Wall Curvature Ratio
T2 - A Noninvasive Index of Pulmonary Arterial Pressure
AU - Reisner, Shimon A.
AU - Azzam, Zaher
AU - Halmann, Menahem
AU - Rinkevich, Diana
AU - Sideman, Samuel
AU - Markiewicz, Walter
AU - Beyar, Rafael
N1 - Funding Information:
From the Department of Cardiology, Rambam Medical Center, the Heart System Research Center, the Julius Silver Institute, and the Department of Biomedical Engineering and Faculty of Medicine, the Technion-Israel Institute of Technology. Supported in part by the United States-Israel Binational Science Foundation (grant 88-00177). Reprint requests: Rafael Beyar, MD, DSc, Department of Cardiology, P.O. Box 9602, Rambam Medical Center, Haifa 31096, Israel. Copyright© 1994 by the American Society ofEchocardiography. 0894-7317/94$1.00 + .10 27/l/50389
PY - 1994
Y1 - 1994
N2 - The leftward septal shift, a well-recognized feature of pulmonary hypertension, was used to quantify right ventricular pressure in 16 patients with pulmonary hypertension and 11 control patients, all with normal left ventricular function. Pulmonary pressure was calculated from the tricuspid regurgitation jet and left ventricular pressure was taken by arm cuff measurements. Short-axis echocardiographic images were obtained and the midwall curvatures of the septum and the left ventricular free wall were measured for each frame from end diastole to end systole and averaged. The septal/free-wall curvature ratio (CR) was 0.37 ± 0.19 in the study group compared with 0.79 ± 0.06 in the control group (p < 0.0001). A tight relationship between the CR and the transseptal/transmural pressure ratio (CR = 0.057 + 0.89 × transseptal/transmural pressure ratio; r= 0.98; p < 0.001) was obtained by linear regression. Given the systolic arterial pressure, the pulmonary systolic pressure is given by: systolic arterial pressure × (1.064 – 1.12 × CR). Therefore the CR can be used as a noninvasive index that reflects the level of pulmonary pressure in relationship to the systolic arterial pressure.
AB - The leftward septal shift, a well-recognized feature of pulmonary hypertension, was used to quantify right ventricular pressure in 16 patients with pulmonary hypertension and 11 control patients, all with normal left ventricular function. Pulmonary pressure was calculated from the tricuspid regurgitation jet and left ventricular pressure was taken by arm cuff measurements. Short-axis echocardiographic images were obtained and the midwall curvatures of the septum and the left ventricular free wall were measured for each frame from end diastole to end systole and averaged. The septal/free-wall curvature ratio (CR) was 0.37 ± 0.19 in the study group compared with 0.79 ± 0.06 in the control group (p < 0.0001). A tight relationship between the CR and the transseptal/transmural pressure ratio (CR = 0.057 + 0.89 × transseptal/transmural pressure ratio; r= 0.98; p < 0.001) was obtained by linear regression. Given the systolic arterial pressure, the pulmonary systolic pressure is given by: systolic arterial pressure × (1.064 – 1.12 × CR). Therefore the CR can be used as a noninvasive index that reflects the level of pulmonary pressure in relationship to the systolic arterial pressure.
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U2 - 10.1016/S0894-7317(14)80415-X
DO - 10.1016/S0894-7317(14)80415-X
M3 - Article
C2 - 8155331
AN - SCOPUS:0028186972
SN - 0894-7317
VL - 7
SP - 27
EP - 35
JO - Journal of the American Society of Echocardiography
JF - Journal of the American Society of Echocardiography
IS - 1
ER -