Simultaneous evaluation of myocardial blood flow, cardiac function and lung water content using [15O]H2O and positron emission tomography View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2006-10-24

AUTHORS

Alexandru Naum, Helena Tuunanen, Erik Engblom, Vesa Oikonen, Hannu Sipilä, Patricia Iozzo, Pirjo Nuutila, Juhani Knuuti

ABSTRACT

PurposeThis study sought to evaluate an imaging approach using [15O]H2O and positron emission tomography (PET) for simultaneous assessment of myocardial perfusion, cardiac function and lung water content as a potential indicator of pulmonary oedema.MethodsTwenty-six subjects divided into two groups (group I, 13 patients with idiopathic dilated cardiomyopathy; group II, 13 healthy volunteers) underwent dynamic PET scanning after intravenous infusion of ≈995 MBq [15O]H2O. In both groups, echocardiograms were performed after the PET studies. From the dynamic [15O]H2O data, lung water content (LWC) at equilibrium, myocardial blood flow (MBF), cardiac output (CO), stroke volume (SV) and stroke volume indexes (SVI) using the indicator dilution principle were determined.ResultsLWC was 18% (p = 0.038) higher in patients than in controls. Global MBF did not differ significantly between the groups, but regional MBF values were significantly lower (p < 0.05) in the anterior and septal walls in the patient group. The results of the Passing-Bablok regression indicated the absence of a systematic difference between the two techniques. Bland-Altman analysis performed for each group (patients vs healthy controls) showed a non-significant bias (p > 0.1) of −0.02 ± 0.82 vs −0.05 ± 0.54 l/min (CO), −1.44 ± 14.31 vs 1.70 ± 10.56 ml/beat (SV) and 0.47 ± 6.21 vs 0.30 ± 5.02 ml/beat/m2 (SVI). The 95% limits of agreement were −1.62 to 1.59 vs −1.11 to 1.01 l/min (CO), −26.61 to 29.49 vs −22.39 to 18.99 ml/beat (SV) and −11.69 to 12.88 vs −9.53 to 10.14 ml/beat/m2 (SVI). Right ventricular CO was increased by 33% (p = 0.014) in the patient group as compared with normal controls.ConclusionOur results demonstrate that additional analysis of cardiac function and lung water content are feasible from the dynamic cardiac [15O]H2O PET studies acquired for myocardial perfusion. The parameters appear to work as expected. Further studies are warranted to elucidate the clinical value of these new parameters. More... »

PAGES

563-572

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00259-006-0259-3

DOI

http://dx.doi.org/10.1007/s00259-006-0259-3

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1021845977

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/17061129


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