Fractal scaling properties of heart rate dynamics and myocardial efficiency in dilated cardiomyopathy View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2009-11

AUTHORS

Tiina Marjatta Salo, Jan Sundell, Juhani Knuuti, Jukka Kemppainen, Kira Stolen, Pirjo Nuutila, Timo H. Mäkikallio, Heikki V. Huikuri, K. E. Juhani Airaksinen

ABSTRACT

INTRODUCTION: Since altered heart rate (HR) fluctuations provide prognostic information in heart failure, we examined the associations between HR dynamics, myocardial efficiency and perfusion, among patients with dilated cardiomyopathy. METHODS: Sixteen patients with dilated cardiomyopathy were enrolled. Patients received supervised strength and aerobic training for 5 months (n = 9) or standard care (n = 7). The short-term scaling exponent (alpha(1)) and frequency domain measures of HR behavior were assessed at baseline and after 5 months of intervention. The left ventricular (LV) function measured using echocardiography and oxidative metabolism measured using positron emission tomography (PET) and [(11)C]-acetate were used to estimate the myocardial efficiency. RESULTS: Short-term fractal exponent alpha(1) correlated significantly with LV myocardial efficiency (r = 0.77, p = 0.002) at baseline. After the intervention period, the majority of patients showed improved myocardial efficiency and small or marked change in HR dynamics toward the natural fractal-like organization (alpha(1) value close 1). Parallel change in fractal properties of HR and myocardial efficiency after intervention was observed in 78% of the patients. Intervention had no significant effect on any other HR fluctuation indices. CONCLUSIONS: The present study suggests that short-term fractal scaling exponent alpha(1), an important prognostic marker in heart failure, is related to LV myocardial efficiency. More... »

PAGES

725

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00392-009-0060-y

DOI

http://dx.doi.org/10.1007/s00392-009-0060-y

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1041670812

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/19688179


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curl -H 'Accept: application/ld+json' 'https://scigraph.springernature.com/pub.10.1007/s00392-009-0060-y'

N-Triples is a line-based linked data format ideal for batch operations.

curl -H 'Accept: application/n-triples' 'https://scigraph.springernature.com/pub.10.1007/s00392-009-0060-y'

Turtle is a human-readable linked data format.

curl -H 'Accept: text/turtle' 'https://scigraph.springernature.com/pub.10.1007/s00392-009-0060-y'

RDF/XML is a standard XML format for linked data.

curl -H 'Accept: application/rdf+xml' 'https://scigraph.springernature.com/pub.10.1007/s00392-009-0060-y'


 

This table displays all metadata directly associated to this object as RDF triples.

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53 schema:description INTRODUCTION: Since altered heart rate (HR) fluctuations provide prognostic information in heart failure, we examined the associations between HR dynamics, myocardial efficiency and perfusion, among patients with dilated cardiomyopathy. METHODS: Sixteen patients with dilated cardiomyopathy were enrolled. Patients received supervised strength and aerobic training for 5 months (n = 9) or standard care (n = 7). The short-term scaling exponent (alpha(1)) and frequency domain measures of HR behavior were assessed at baseline and after 5 months of intervention. The left ventricular (LV) function measured using echocardiography and oxidative metabolism measured using positron emission tomography (PET) and [(11)C]-acetate were used to estimate the myocardial efficiency. RESULTS: Short-term fractal exponent alpha(1) correlated significantly with LV myocardial efficiency (r = 0.77, p = 0.002) at baseline. After the intervention period, the majority of patients showed improved myocardial efficiency and small or marked change in HR dynamics toward the natural fractal-like organization (alpha(1) value close 1). Parallel change in fractal properties of HR and myocardial efficiency after intervention was observed in 78% of the patients. Intervention had no significant effect on any other HR fluctuation indices. CONCLUSIONS: The present study suggests that short-term fractal scaling exponent alpha(1), an important prognostic marker in heart failure, is related to LV myocardial efficiency.
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