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Left ventricular output indices in hospitalized heart failure: when “simpler” may not mean “better”

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Abstract

Assessment of left ventricular (LV) output in hospitalized patients with heart failure (HF) is important to determine prognosis. Although echocardiographic LV ejection fraction (EF) is generally used to this purpose, its prognostic value is limited. In this investigation LV-EF was compared with other echocardiographic per-beat measures of LV output, including non-indexed stroke volume (SV), SV index (SVI), stroke distance (SD), ejection time (ET), and flow rate (FR), to determine the best predictor of all-cause mortality in patients hospitalized with HF. A final cohort of 350 consecutive patients hospitalized with HF who underwent echocardiography during hospitalization was studied. At a median follow-up of 2.7 years, 163 patients died. Non-survivors at follow-up had lower SD, SVI and SV, but not ET, FR and LV-EF than survivors. At multivariate analysis, only age, systolic blood pressure, chronic kidney disease, chronic obstructive pulmonary disease, use of angiotensin-converting enzyme inhibitors/angiotensin receptor blockers and SVI remained significantly associated with outcome [HR for SVI 1.13 (1.04–1.22), P = 0.003]. In particular, for each 5 ml/m2 decrease in SVI, a 13% increase in risk of mortality for any cause was observed. SVI is a powerful prognosticator in HF patients, better than other per-beat measures, which may be simpler but partial or incomplete descriptors of LV output. SVI, therefore, should be considered for the routine echocardiographic evaluation of patients hospitalized with HF to predict prognosis.

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Authors and Affiliations

  1. Cardiology Unit and LTTA Centre, University of Ferrara, Ferrara, Italy

    Donato Mele, Vittorio Smarrazzo, Davide Dal Molin, Giovanni Andrea Luisi, Filippo Trevisan, Andrea Fiorencis & Roberto Ferrari

  2. Cardiology Unit, Morgagni-Pierantoni Hospital, Forlì, Italy

    Gabriele Pestelli

  3. Maria Cecilia Hospital, GVM Care & Research, E.S. Health Science Foundation, Cotignola, (RA), Italy

    Roberto Ferrari

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  1. Donato Mele
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  2. Gabriele Pestelli
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  3. Vittorio Smarrazzo
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Correspondence to Donato Mele.

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Mele, D., Pestelli, G., Smarrazzo, V. et al. Left ventricular output indices in hospitalized heart failure: when “simpler” may not mean “better”. Int J Cardiovasc Imaging 37, 59–68 (2021). https://doi.org/10.1007/s10554-020-01946-x

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  • DOI: https://doi.org/10.1007/s10554-020-01946-x

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