Müller HM, Tripolt MB, Rehak PH, Groell R, Rienmüller R, Tscheliessnigg KH. Noninvasive measurement of pulmonary vascular resistances by assessment of cardiac output and pulmonary transit time.
Invest Radiol 2000;
35:727-31. [PMID:
11204799 DOI:
10.1097/00004424-200012000-00006]
[Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
RATIONALE AND OBJECTIVES
Pulmonary vascular resistance is of special interest in many diseases. Usually it is determined invasively by catheterization, but cardiac output and pulmonary transit time can be ascertained by several noninvasive methods.
METHODS
Fourteen heart recipients (age 34-71 years) were examined by electron-beam CT of the heart. Cine and flow studies were performed using a total of 60 mL of contrast and a breath-hold of 20 seconds.
RESULTS
A mathematical model for calculating pulmonary vascular resistances from noninvasively measured cardiac outputs and pulmonary transit times was developed. Right-sided heart catheterization served as the reference method.
CONCLUSIONS
The formula created seems to allow a clinically valid estimate of pulmonary vascular resistance from noninvasively acquired data.
Collapse