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Proceedings Paper

Postoperative Measurements Of Ventricular Function In Man Using An Implantable Ultrasonic Sensor
Author(s): Craig J. Hartley; Raphael S. Rabinovitz; Hee Shik Lee; Jacques E. Chelly; George P. Noon; Roberto Bolli
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Paper Abstract

To monitor regional ventricular function in man following cardiac surgery we have developed an implantable ultrasonic sensor which is attached to the epicardial surface during surgery to measure wall thickening. During the last 18 months we have implanted sensors in 33 patients for up to 2 days postoperatively. Good quality signals were obtained from 25 of the sensors, and all were extracted sucessfully in the intensive care unit. Thickening fraction (TF) was highly variable among patients, dropped transiently after surgery, but remained relatively stable in most patients during the recovery period. Four patients developed sustained systolic thinning suggestive of ischemia or infarction during the recovery period. However, none of these patients were symptomatic or had ECG changes or other positive tests for ischemia. We conclude that the method is a safe, reliable, and accurate technique to monitor the recovery of ventricular function following surgery and that it provides quantitative information not obtainable by other methods.

Paper Details

Date Published: 8 August 1989
PDF: 6 pages
Proc. SPIE 1068, Catheter-Based Sensing and Imaging Technology, (8 August 1989); doi: 10.1117/12.952164
Show Author Affiliations
Craig J. Hartley, Baylor College of Medicine and The Methodist Hospital (United States)
Raphael S. Rabinovitz, Baylor College of Medicine and The Methodist Hospital (United States)
Hee Shik Lee, Baylor College of Medicine and The Methodist Hospital (United States)
Jacques E. Chelly, Baylor College of Medicine and The Methodist Hospital (United States)
George P. Noon, Baylor College of Medicine and The Methodist Hospital (United States)
Roberto Bolli, Baylor College of Medicine and The Methodist Hospital (United States)


Published in SPIE Proceedings Vol. 1068:
Catheter-Based Sensing and Imaging Technology
Alan I. West, Editor(s)

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