Impedance cardiography for demonstrating procedural efficacy of percutaneous mitral balloon valvuloplasty

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Omaygenç M. O., Doğan C., Bakal R. B., Candan Ö., Hatipoğlu Akpinar S., Babür Güler G., ...More

Turkiye Klinikleri Cardiovascular Sciences, vol.27, no.3, pp.81-87, 2015 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 3
  • Publication Date: 2015
  • Doi Number: 10.5336/cardiosci.2015-44142
  • Journal Name: Turkiye Klinikleri Cardiovascular Sciences
  • Journal Indexes: Scopus
  • Page Numbers: pp.81-87
  • Keywords: Cardiography, Impedance, Mitral valve annuloplasty, Mitral valve stenosis
  • Istanbul Medipol University Affiliated: Yes


Objective: Impedance Cardiography (ICG) method, facilitates measuring hemodynamic parameters indirectly by recording thoracic impedance variations induced by cyclic changes in blood flow. The aim of this study is to evaluate alterations in hemodynamic parameters obtained by impedance cardiography (ICG) in addition to conventional echocardiographic and catheterization data after percutaneous mitral balloon valvuloplasty (PMBV). Material and Methods: 18 patients with severe rheumatic mitral stenosis to whom PMBV had been performed were included in this study. Impedance cardiographic measurements were performed in addition to routine echocardiographic examination and invasive left atrial and pulmonary arterial pressure recordings before and after the procedure. Cardiac output was calculated with direct Fick method before PMBV. Average values of several measurements were used to obtain the most accurate results for atrial fibrillation patients in the study group. Results: Following successful PMBV, in impedance cardiographic evaluation an increase in cardiac output (4.69±1.46 and 5.68±1.3 l/min, before and after PMBV, respectively, p<0.001) and cardiac index (2.72±0.81 and 3.29±0.73 l/min/m2, before and after PMBV, respectively, p<0.001) an evident prolongation in ejection period (246.8±40.3 and 275.2±32.1 msec, before and after PMBV, respectively, p<0.001); and a statistically significant reduction in pre-ejection period (103.7±41.8 and 82.7±16.8 msec, before and after PMBV, respectively, p=0.033), and thoracic fluid content (34.3±11.2 and 27.7±5.31/kΩ, before and after PMBV, respectively, p=0.037) was observed. There was a strong correlation between preprocedural cardiac output calculations of ICG and direct Fick method (r:0.89, p<0.001). onclusion: In addition to the conventional methods, serial recordings of impedance cardiographic outputs may yield beneficial information for the assessment of PMBV efficacy.As a non-invasive and easily applicable method, it might be utilized during in-hospital follow-up.