Measurement of pressures in man by cardiac catheters.
نویسندگان
چکیده
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 cathetermanometer systems are most unlikely when such catheters are threaded through the beating heart.
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عنوان ژورنال:
- Circulation research
دوره 2 4 شماره
صفحات -
تاریخ انتشار 1954