Journal of Clinical Medicine (Jun 2021)

Hemodynamic Heterogeneity of Reduced Cardiac Reserve Unmasked by Volumetric Exercise Echocardiography

  • Tonino Bombardini,
  • Angela Zagatina,
  • Quirino Ciampi,
  • Rosina Arbucci,
  • Pablo Martin Merlo,
  • Diego M. Lowenstein Haber,
  • Doralisa Morrone,
  • Antonello D'Andrea,
  • Ana Djordjevic-Dikic,
  • Branko Beleslin,
  • Milorad Tesic,
  • Nikola Boskovic,
  • Vojislav Giga,
  • José Luis de Castro e Silva Pretto,
  • Clarissa Borguezan Daros,
  • Miguel Amor,
  • Hugo Mosto,
  • Michael Salamè,
  • Ines Monte,
  • Rodolfo Citro,
  • Iana Simova,
  • Martina Samardjieva,
  • Karina Wierzbowska-Drabik,
  • Jaroslaw D. Kasprzak,
  • Nicola Gaibazzi,
  • Lauro Cortigiani,
  • Maria Chiara Scali,
  • Mauro Pepi,
  • Francesco Antonini-Canterin,
  • Marco A. R. Torres,
  • Michele De Nes,
  • Miodrag Ostojic,
  • Clara Carpeggiani,
  • Tamara Kovačević-Preradović,
  • Jorge Lowenstein,
  • Adelaide M. Arruda-Olson,
  • Patricia A. Pellikka,
  • Eugenio Picano,
  • on behalf of the Stress Echo 2020 Study Group of the Italian Society of Cardiovascular Imaging

DOI
https://doi.org/10.3390/jcm10132906
Journal volume & issue
Vol. 10, no. 13
p. 2906

Abstract

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Background: Two-dimensional volumetric exercise stress echocardiography (ESE) provides an integrated view of left ventricular (LV) preload reserve through end-diastolic volume (EDV) and LV contractile reserve (LVCR) through end-systolic volume (ESV) changes. Purpose: To assess the dependence of cardiac reserve upon LVCR, EDV, and heart rate (HR) during ESE. Methods: We prospectively performed semi-supine bicycle or treadmill ESE in 1344 patients (age 59.8 ± 11.4 years; ejection fraction = 63 ± 8%) referred for known or suspected coronary artery disease. All patients had negative ESE by wall motion criteria. EDV and ESV were measured by biplane Simpson rule with 2-dimensional echocardiography. Cardiac index reserve was identified by peak-rest value. LVCR was the stress-rest ratio of force (systolic blood pressure by cuff sphygmomanometer/ESV, abnormal values ≤2.0). Preload reserve was defined by an increase in EDV. Cardiac index was calculated as stroke volume index * HR (by EKG). HR reserve (stress/rest ratio) <1.85 identified chronotropic incompetence. Results: Of the 1344 patients, 448 were in the lowest tertile of cardiac index reserve with stress. Of them, 303 (67.6%) achieved HR reserve <1.85; 252 (56.3%) had an abnormal LVCR and 341 (76.1%) a reduction of preload reserve, with 446 patients (99.6%) showing ≥1 abnormality. At binary logistic regression analysis, reduced preload reserve (odds ratio [OR]: 5.610; 95% confidence intervals [CI]: 4.025 to 7.821), chronotropic incompetence (OR: 3.923, 95% CI: 2.915 to 5.279), and abnormal LVCR (OR: 1.579; 95% CI: 1.105 to 2.259) were independently associated with lowest tertile of cardiac index reserve at peak stress. Conclusions: Heart rate assessment and volumetric echocardiography during ESE identify the heterogeneity of hemodynamic phenotypes of impaired chronotropic, preload or LVCR underlying a reduced cardiac reserve.

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