International Journal of Physiology
  • Year: 2014
  • Volume: 2
  • Issue: 2

Comparative Assessment of Stroke Volume by Transthoracic Electrical Bio-Impedance & Echocardiography in Patients of Acute Myocardial Infarction

  • Author:
  • Samir Kumar Singh1, Manish Bajpai2,, Sunita Tiwari3, Rishi Sethi4, Dileep Kumar Verma5, Gaurav Chaudhary6
  • Total Page Count: 5
  • Page Number: 63 to 67

1PGT Department, King George's Medical University, Lucknow, Uttar Pradesh, India

2Professor, Department of Physiology, King George's Medical University, Lucknow, Uttar Pradesh, India

3Professor & Head, Department of Physiology, King George's Medical University, Lucknow, Uttar Pradesh, India

4Associate Professor, Department of Cardiology, King George's Medical University, Lucknow, Uttar Pradesh, India

5Associate Professor, Department of Physiology, King George's Medical University, Lucknow, Uttar Pradesh, India

6Senior Resident, Department of Cardiology, King George's Medical University, Lucknow, Uttar Pradesh, India

*Corresponding author: Manish Bajpai, Professor, Department of Physiology, King George’s Medical University, Lucknow U.P., India. Email: bajpaimanish@yahoo.com, bajpaimanish@yahoo.com

Online published on 24 September, 2014.

Abstract

To compare non-invasive determination of stroke volume (SV) by whole body electrical bioimpedance using the NICOMON (Larsen & Toubro Ltd., India) apparatus and Doppler echocardiography in acute myocardial infarction (AMI) patients.

The present study enrolled 100 AMI patients, who have been assessed by ECHO and NICOMON for SV, where ECHO is considered as a reference method for comparison. SV by Transthoracic electrical bio-impedance was measured by passing an alternating current and measuring the bio-impedance across the thorax. End diastolic volume (EDV), End systolic volume (ESV) & Left ventricular outflow tract (LVOT) diameter, measured by ECHO was used to calculate SV. Various statistical methods like "t"-test & correlation coefficient (r) have been used where found suitable.

Mean value of SV by NICOMON was found to be significantly higher as compared to that of ECHO (p < 0.001) and a weak positive correlation ("r" value=0.14) between ECHO and NICOMON SV value was found. Conclusion: Measurement of SV by NICOMON showed weak positive correlation with Doppler derived SV. So NICOMON needs more elaborative studies to establish it as an alternative method of ECHO for stroke volume measurement non-invasively.

Keywords

Transthoracic Electrical Bio-impedance