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- Title
Exploring the mechanisms underlying stroke volume variability reduction in a murine model of heart failure with reduced ejection fraction.
- Authors
Fernández-Mendoza, Gemma; Méndez-Fernández, Abraham; Alves-Figueiredo, Hugo J.; García-Rivas, Gerardo; Santillán, Moisés
- Abstract
Heart failure with reduced ejection fraction (HFrEF) is accompanied by disregulation of cardiovascular function. Heart rate variability (HRV) is commonly used to assess autonomic dysfunction in HFrEF. However, analysis of stroke volume variability (SVV) may provide additional insights. We examined HRV and SVV in a mouse model of HFrEF. HFrEF mice exhibited reduced stroke volume and ejection fraction versus controls, confirming cardiac contractile dysfunction. HRV was preserved in HFrEF mice. However, SVV was markedly diminished, indicating dissociation between HRV and SVV regulation. Using a mathematical model, we propose that Frank-Starling mechanism abnormalities in HFrEF disrupt SVV independent of HRV. Assessing SVV could thus provide unique insights beyond HRV into cardiovascular control deficits in HFrEF.
- Subjects
VENTRICULAR ejection fraction; MICE; HEART failure; HEART beat; FRACTIONS; DYSAUTONOMIA
- Publication
PLoS ONE, 2023, Vol 18, Issue 10, p1
- ISSN
1932-6203
- Publication type
Article
- DOI
10.1371/journal.pone.0292687