Journal of Isfahan Medical School

Journal of Isfahan Medical School

Comparison of Cardiac Output Measured by Phonocardiography and Transthoracic Echocardiography in Patients with Valvular Disease and Congenital Heart Anomalies

Document Type : Original Article (s)

Authors
Mojtaba Mansouri 1
Mahdi Kheyrollahi 2
Monireh Mokhtari 3
1 Associate Professor, Department of Anesthesiology and Critical Care, School of Medicine AND Anesthesiology and Critical Care Research Center, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
2 Digital Signal Processing Research Lab, School of Electrical and Computer Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran
3 Student of Medicine, School of Medicine AND Student Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran
Abstract
Background: The aim of this study was to compare cardiac output (CO) between two methods of phonocardiography and transthoracic echocardiography in patients with valvular disease and congenital heart anomalies.Methods: Seventy one patients (39 males and 32 females) ranging from 5 days to 13 years (mean: 22.5 months) were enrolled in the study and CO was obtained using transthoracic echocardiography. Afterwards, their heart sounds were recorded using an electronic stethoscope and analyzed to calculate CO and ejection fraction (EF). These amounts were compared to each other using statistical tests.Findings: The mean CO reported by transthoracic echocardiography and phonocardiography was reported 4.62 (SD = 0.98) and 4.55 (SD = 0.96), respectively. Comparison of these values between two methods showed that CO amounts are both significantly higher from transthoracic echocardiography (P < 0.05). Pearson correlation analysis showed a statistically significant correlation between CO among two methods (Pearson coefficient: 0.99 and 0.74 respectively; P < 0.05).Conclusion: This study showed that phonocardiography cannot be an exact alternative for transthoracic echocardiography to report CO; however, considering the significant correlation between these amounts, it can give us an acceptable estimation of heart condition by CO and should be used cautiously
Keywords
Echocardiography
Phonocardiography
Cardiac output
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Journal of Isfahan Medical School
Volume 34, Issue 372 - Serial Number 372
January and February 2016
Pages 143-147

  • Receive Date 01 December 2015
  • Accept Date 06 April 2022