QRS area monitoring during stress test: A novel index to separate normal to ischaemic patients?

Mario Curione, Camillo Cammarota, Giambattista Cardarelli, Simonetta Di Bona, Teresa Montesano, Laura Travascio, Marzia Colandrea, Marco Colotto, Massimo Ciancamerla, Giuseppe Ronga

Research output: Contribution to journalArticle

Abstract

QRS amplitude is correlated with ventricular volume. During stress test ventricular volume changes differently in normal subjects and in ischaemic patients, in relation to different ventricular compliance. The aim of the study is to test whether monitoring of QRS area profile during stress test is able to discern ischaemic from non-ischaemic patients. 28 patients underwent SPECT myocardial perfusion imaging at rest and during bicycle stress test. Two groups were selected: group A (control), 15 subjects with normal distribution of tracer uptake at rest and after stress; group B (ischaemic patients), 13 patients with reduced or absent tracer uptake at rest in one or more areas. QRS total area time profile shows a clearly recognizable difference in patients with ischemia vs. controls. A linear correlation was found between QRS rest total area and cardiac mass in normal subjects but not in ischaemic patients (r=0.53 and r=-0.27 respectively); an inverse correlation was also found between QRS rest total area and rest left ventricular volume and left ventricular section area, evaluated with SPECT (r=-0.52 and r=-0.58 respectively). We can hypothesize that QRS total area is linked to haemodynamic changes. It might be useful to employ in clinical practice QRS area in addition to the standard ST criterion to increase diagnostic capability of the ECG stress test.

Original languageEnglish
Pages (from-to)51-56
Number of pages6
JournalArchives of Medical Science
Volume4
Issue number1
Publication statusPublished - Mar 2008

Keywords

  • Myocardial ischaemia
  • QRS area
  • Stress test
  • Ventricular filling

ASJC Scopus subject areas

  • Medicine(all)

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    Curione, M., Cammarota, C., Cardarelli, G., Di Bona, S., Montesano, T., Travascio, L., Colandrea, M., Colotto, M., Ciancamerla, M., & Ronga, G. (2008). QRS area monitoring during stress test: A novel index to separate normal to ischaemic patients? Archives of Medical Science, 4(1), 51-56.