Correlation between R Wave Amplitude in Surface E.C.G and Myocardial Viability by Dobutamine Stress Echocardiography in Post-Myocardial Infarction Patients

Introduction:Left ventricular (LV) function and remodeling are key prognostic factors after myocardial infarction (MI). Low-dose dobutamine echocardiography (LDDE) is a practical and safe method for evaluating myocardial viability. Furthermore, ECG parameters, such as the R wave, can help predict viability assessed through LDDE.
The aim: This study aimed to find out the correlation between R wave amplitude in surface ECG and the results of viability tests by dobutamine stress echocardiography in post-myocardial infarction patients.
Methods:Our study included 40 adult patients with a confirmed history of myocardial infarction (MI), verified through ECG, biomarkers, or echocardiographic evidence. The sample size was set at 40 participants, accounting to a 10% non-response rate. Study procedures included history taking, clinical examination, standard 12-lead ECG, transthoracic echocardiography (TTE), and dobutamine stress echocardiography (DSE).
Results:There is a highly significant association between R wave amplitude and viability results determined by DSE, with notable sensitivity (93.75%) and specificity (87.5%), along with a positive predictive value (PPV) of 83.3% and a negative predictive value (NPV) of 95.5%. Conclusions:There was a correlation between R wave amplitude in surface ECG and the results of viability tests by DSE in post-myocardial infarction patients.