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2. Effect of respiration on venous return and stroke volume in cardiac tamponade.

Author

Gabe IT, Mason DT, Gault JH, Ross J Jr, Zelis R, Mills CJ, Braunwald E, and Shillingford JP

Subjects
Adult, Aorta physiopathology, Blood Flow Velocity, Blood Pressure, Cardiac Catheterization, Cardiac Volume, Electrocardiography, Heart Rate, Humans, Male, Venae Cavae physiopathology, Venous Pressure, Cardiac Output, Cardiac Tamponade physiopathology, Pulse, Respiration
Abstract

Measurements have been made of pressure and blood velocity in venae cavae and aorta in a patient with severe cardiac tamponade in whom there was pulsus paradoxus. The characteristic pressure changes of pulsus paradoxus were associated with variations in peak blood velocity in the ascending aorta and stroke output. Maximum filling of the right side of the heart occurred during inspiration, and was associated in time with minimum left ventricular stroke volume. These findings point to competition for space by the ventricles in the distended pericardial sac as being the major factor in the production of pulsus paradoxus.

Published
1970
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4. Measurement of instantaneous blood flow velocity and intravascular pressure with a catheter incorporating an electromagnetic velocity probe.

Author

Mills CJ, Mason DT, Gault J, Ross J Jr, Gabe IT, Braunwald E, and Shillingford JP

Subjects
Aortography, Cardiac Output, Coronary Disease physiopathology, Electricity, Humans, Magnetics, Pulmonary Artery diagnostic imaging, Venae Cavae, Blood Flow Velocity, Blood Pressure Determination instrumentation, Cardiac Catheterization instrumentation
Published
1969

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