Correlation between Coronary Angiography and Impedance Cardiography

  • Bhabani Prasad Chattopadhyay Medical College, Kolkata, West Bengal, India,
  • Kalyan Kumar Saha Medical College, Kolkata, West Bengal, India
  • Rammohan Roy Medical College, Kolkata, West Bengal, India
  • Nasim Mandal Medical College, Kolkata, West Bengal, Indiaof
  • Ashok Rathore Medical College, Kolkata, West Bengal, India
Keywords: Artificial neural network, Augmentation index, Coronary angiography, Impedance cardiography, Left ventricular ejection fraction, Left ventricular end-diastolic volume, Left ventricular end-systolic volume, Regional wall motion abnormality, Stroke volume


Aims and Objectives: The aims of the study were to find out the correlation between coronary angiographic findings and hemodynamic parameters derived from impedance cardiography (ICG) and echo-Doppler study.
Patients, Materials and Methods: A total of 200 patients of acute myocardial infarction having chest pain, ST elevation in two or more contiguous leads of electrocardiogram (ECG), biomarker positivity, echocardiographic evidence of regional wall motion abnormality (RWMA), and coronary angiographic evidence of coronary lesions were recruited. Subjects unwilling to participate, moribund, critically ill subjects, and patients with concomitant heart failure, arrhythmia, and valvular lesions were excluded from the study. GE™ Vivid 7 Dimension machine was used for ECG-gated echo-Doppler studies. The left ventricular ejection fraction (LVEF), stroke volume (SV), RWMA, diastolic function, etc., were observed. ICG measured LVEDV, LVESV, LVEF, and other parameters particularly amplitudes of the different waves. Coronary angiography (CAG) was done in the Cath Lab having “Siemens™ Axiom Artis Zee (floor)” equipment.
Results and Analysis: Results-analysis revealed there is negative correlation (Pearson’s correlation coefficient, r = −0.8) between augmentation pressure and coronary angiographic stenosis percentage and P value is also significant (P = 0.034). Pulse pressure (PP) also is positively correlated (r = −0.78) with coronary angiographic stenosis percentage and P value is also significant (P = 0.027). There is a negative correlation (r = −0.259) between augmentation index (AIx) and coronary angiographic lesions and that is statistically significant (P = 0.03).
Conclusion: There is a positive correlation between ICG -derived hemodynamic parameters and the percentage stenosis of coronary arteries. Rise of augmentation pressure and PP in the ICG waveform is associated with coronary artery disease severity. AIx is negatively correlated with severity of coronary arterial stenosis

Author Biographies

Bhabani Prasad Chattopadhyay, Medical College, Kolkata, West Bengal, India,

Associate Professor, Department of Cardiology, 

Kalyan Kumar Saha, Medical College, Kolkata, West Bengal, India

Post Doctoral Trainee, Department of Cardiology, 

Rammohan Roy, Medical College, Kolkata, West Bengal, India

Assistant Professor, Department of Cardiology, 

Nasim Mandal, Medical College, Kolkata, West Bengal, Indiaof

Post Doctoral Trainee, Department of Cardiology, 

Ashok Rathore, Medical College, Kolkata, West Bengal, India

Post Doctoral Trainee, Department of Cardiology, 


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