Background: Monitoring of lung fluid content (LFC) in order to predict acute heart failure (AHF) during acute myocardial infarction (AMI) is an unmet challenge.
Aim: To evaluate in AMI patients the ability of proposed radiological score (RS), which is the sum of selected radiological signs of congestion, to reflect correctly LFC, as assessed with repeat physical examinations and lung impedance (LI) measurements.
Methods: Chest X-rays were taken at baseline, when rales were detected, whenever indicated, and at conclusion of monitoring. RS grading for LFC assessment was: RS = 0-1 for normal X-ray, RS = 2-4 for interstitial congestion, and RS values of 5-6, 7-8 and 9-10 signified mild, moderate and severe alveolar edema, respectively.
Results: 624 AMI patients without AHF at baseline were monitored (94 ± 42 h). 476 patients (76%) with baseline RS of 0.3 ± 0.5 did not develop AHF. Overt AHF developed in 148 patients (24%) during monitoring; baseline RS (0.6 ± 0.8) reached 5.4 ± 0.7, 7.0 ± 0.8, and 9.8 ± 0.5 at the stages of mild, moderate, and severe alveolar edema, respectively. AHF resolved with treatment. RS decreased to 1.5 ± 1.3 (P < 0.01) and correlated with physical examination (r = 0.6, P < 0.01) and LI (r = -0.9, P < 0.01).
Conclusion: RS correlated well with findings on physical examination during AHF and closely correlated with LI.
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| http://dx.doi.org/10.3109/17482941.2011.567279 | DOI Listing |
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