Correlation between Echo-Doppler Study and Impedance Cardiography in Acute Myocardial Infarction

ABSTRACT

Introduction: Acute Myocardial Infarction(AMI) is quitecommon and despite lack of adequate infrastructure it isa compulsion for doctors in India to treat patients of AMIeven in the rural hospitals due to lack of transportation andcommunication facilities on round the clock basis. In ruralsetup usually ECG and Troponin biomarker kits are available.Aim and objective of the present study was to validateimpedance cardiography derived haemodynamic parametersagainst echo-doppler study.Material and methods: 200 patients of AMI were subjectedto impedance cardiography and echodoppler study.Results: Echocardiographic Mean±S.D values of LVEDV,LVESV , LVEF, IVCT, IVRT, LVET, Total Diastolic Time,Total Systolic Time & MPI were as follows 80.78±25.554,40.62±13.062, 41.18±15.669, 46.13±8.5, 50±8.907,65.93±12.103, 334.11±38.668, 482.97±83.164, 318.4±32.715& 0.4311±0.0732 respectively. Similarly impedancecardiographic Mean±S.D. values of LVEDV, LVESV , LVEF,IVCT, IVRT, LVET, Total Diastolic Time, Total Systolic Timeand MPI are as follows 102.813±26.006, 53.048±14.773,39.646±18.095, 40.4786±10.820, 56.953±13.69,67.153±20.0375, 327.2035±23.91123, 449.4202±91.3202,349.8660±56.011 and 0.4106±0.08682 respectively.Conclusion: There was strong positive correlation among allthe haemodynamic parameters of echocardiography and ICGand the P values were significant in all the parameters studied(<0.001). It can be used for haemodynamic assessment ofpatients in rural setup where the facility of echo-doppler studyor invasive haemodynamic monitoring is not available.