Citations 2
Measurement of Pressures in Man by Cardiac Catheters
Wood, Earl H., Leusen, I, Warner, Homer R., Wright, John L.
Circulation Research | June 12, 2012 | Volume: 2 | Issue: 4 | Pages: 294-303
Relationships between artefacts in recorded intracardiac pulses and the dynamic response and susceptibility of catheter-manometer systems to artefacts caused by motion of the catheter were investigated. Sine-wave motions of the catheter, resembling motion frequently seen when the catheter is in the pulmonary artery, produce sine-wave pressure variations with peak-to-peak amplitudes of 10 mm. Hg. Square-wave motions (impacts) produce high-frequency pressure variations, greatest (10 to 200 mm. Hg) when directed along the axis and much less when perpendicular to the axis of the catheter. High-fidelity records of pressure by conventional cardiac catheter-manometer systems are most unlikely when such catheters are threaded through the beating heart.
Hemodynamic and Clinical Appraisal of Coarctation Four to Seven Years after Resection and End-to-End Anastomosis of the Aorta
Wright, John L., Burchell, Howard B., Wood, Earl H., Hines, Edgar A., Clagett, O. Theron
Circulation | June 11, 2012 | Volume: 14 | Issue: 5 | Pages: 806-814
This study was undertaken to ascertain whether coarctation of the aorta produces permanent hemodynamic abnormalities that may persist despite resection and end-to-end anastomosis. The results of studies in 10 patients 4 to 7 years after operation are compared to those obtained before and immediately after operation. The most significant finding was continued decrease in residual coarctation, in addition to dramatic immediate postoperative improvement in the degree of circulatory impairment.