ArticleClinical research in cardiology : official journal of the German Cardiac Society2009
Fractal scaling properties of heart rate dynamics and myocardial efficiency in dilated cardiomyopathy.
Article in Clinical research in cardiology : official journal of the German Cardiac Society, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed, 5 citations in OpenAlex.
- Effects of Cardiac Resynchronization Therapy on Cardio-Respiratory Coupling.Entropy (Basel, Switzerland) · 2021Article
- Short-term vs. long-term heart rate variability in ischemic cardiomyopathy risk stratification.Frontiers in physiology · 2013Article
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9 authors at 2 institutions in 1 country.
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Abstract
introductionSince 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.
methodsSixteen 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.
resultsShort-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.
conclusionsThe 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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